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Frequently Asked Questions

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Are the Xantrex GT inverters dual tracking

No, the Xantrex GT inverters are a single tracker (MPPT) only

Did Xantrex ever sell batteries?

 Did Xantrex ever sell batteries?

Yes. See attached.
However, Xantrex/Schneider Electric no longer manufactures batteries.

Did Xantrex ever make a battery?

 Did Xantrex ever make a battery?

Yes. See attached.
However, Xantrex/Schneider Electric no longer manufactures batteries.

Wireless remotes for Xantrex products

The Gateway product is a wireless monitor for Xantrex Residential Xanbus enabled products. These consist of the single phase GT and the XW inverter charger

There are currently no wireless remote controls available or contemplated for any Xantrex products.

How long is the Xantrex GT Warranty?

The Xantrex GT Warranty length is 5 years from date of installation. If date of installation can not be proven, then it is based off of the manufacturing date.

Are AC fuses covered under warranty for Xantrex GT inverters?

No, due to the nature of what can cause them to blow.
If the replacement fuse blows immediately after replacement, please contact Technical Support on 1300 202 525.

AC Fuse size for GT2/8 inverter: 15A ceramic slow blow
AC Fuse size for GT5/0 inverter: 30A ceramic slow blow

Customer is trying to find replacement parts and service for select out of production units/ out of warranty unit.

Please have a customer contact a Xantrex Authorized Service Centers (ASC)

Xantrex Authorized Service Centers repair out-of-warranty and non-warrantable products.

How to power a Xantrex System Control Panel when no XW+ or SW is present?

When using a Xantrex System Control Panel, this unit is powered from either an XW+ or an SW hybrid inverter.

When in a situation that either one of these hybrid inverters are not available, to get the SCP to operate, you will need to provide an independant 15V DC 200mA supply to the Xanbus network.

+ve should be connected straight to pins 1,2 and 7. -ve should be connected to 3, 6 and 8.

ECCN Code / Harmonized codes for Xantrex Solar Products

Customers will occasionally request the ECCN code for Xantrex solar products. This is a code required for products being shipped out of the US. All Xantrex inverter products are code EAR99. 

Customers may also request the Harmonized code for Xantrex solar products. This number is ten digits long; the last four numbers are country specific so Schneider Electric cannot provide that (a local customs broker at the receiving end can determine what these four digits are). The first 6 digits are 850440.

Will the Xantrex Communication Gateway Work With The Conext XW+?

The customer owns a Communication Gateway and is looking to upgrade their legacy XW or has received a Conext XW+ unit as a replacement

Product Line
Conext XW+, Xantrex Communication Gateway

Conext XW+ connected with a Xantrex Communication Gateway on Xanbus

The Xantrex Communication Gateway was discontinued before the release of the Conext XW+.  No firmware was released for the Gateway to make it compatible with the Conext XW+ units.  Any unit carrying XW firmware that is version 2.00 or higher will not be recognized by the Gateway.

The firmware of the XW+ unit has to be downgraded to v1.07 to work with the Communication Gateway.  It will then be recognized by the Gateway as an 865-1000.  To downgrade the firmware, a Conext Combox or a Configuration Tool will be required since the Gateway does not recognize the XW+.


Although Xantrex doesn't make or technically support this product, we occasionally get asked questions about it.

Files exported using this software are saved in .xls format. This information is provided as a courtesy and doesn't constitute an endorsement by Xantrex.

Are the Conext RL range of inverters dual tracking

Yes, this is one of the benefits of this range of inverters over the Xantrex GT range.
While it is possible to connect unbalanced strings, it is best to keep the tracking as close to each other as possible

GFCI compatibilitity list for Modified Sine Wave


Some make/models of GFCI are not compatible with certain Xantrex models


Battery backup


Compatibility list attached


Some GFCI's may buzz or hum due to the square waveform of modified sine wave

How to troubleshoot a ground fault error on a Schneider Electric Xantrex GT Inverter?

Important Note: Troubleshooting Schneider Electric Xantrex GT Inverter faults including ground faults must be undertaken and completed by a CEC - Grid Connect Inverter accredited solar installer/service agent.
This is a safety requirement as failure to follow installation instructions could result in death or serious injury in addition to voiding terms of the warranty.

Complete the ground fault troubleshooting section of the attached site troubleshooting checklist.

Additionally, the isolation impedance of both the positive leg to earth and negative leg to earth can be measured using a minimum 600VDC rated multimeter.
The inverter should be powered down and the DC inputs disconnected to obtain an accurate isolation impedance reading.

Both the positive leg to earth and the negative leg to earth should be greater than 500kOhms. If they are displaying greater than 500kOhms then the ground fault error is being caused by a faulty inverter.
If you are measuring less than 500kOhms on either the positive leg to earth or the negative leg to earth then you will need to inspect your PV panels, wiring, isolators, breakers for moisture and wiring issues which could be resulting in the ground fault condition. 

If you have an external earthing kit installed as required by your PV panel manufacturer then the internal ground fault protection of the Xantrex GT Inverter should have been disabled. 


What is the part number for the Battery Temp Sensor (BTS) for my Xantrex or Solar product?

Customer is searching for a replacement part number for a BTS.

Product Line:
Conext XW+, Conext XW, Conext SW, Trace Inverters, Legacy Products

All Xantrex and Schneider Solar product groups.

BTS has become damage or misplaced.

Product Family Xantrex Part Number
Conext XW, Conext SW, TR, Truecharge2*, XC chargers*, FSW2000* 808-0232-01
Trace SW, CR*, DR, RV*, C series 130-0004-01-01
Trucharge20+/40+*, Prosine 3.0* 808-0231
RS/MS*, RV/GS series*, FSW3000*, FSW2012*, FSW3012*, Prosine 2.0* 809-0946
FDM 458* / FDM Marine* 76-0022-00

*Mobile product; for mobile support please contact Xantrex mobile division at (800) 670-0707 option #2.

What are the connectors required for the DC Input on a Conext RL5000 in SOLA?

The connectors that are required are branded as Multi-Contact MC4.
The part numbers are also located in the Installation and Operation Manual P.2-39.
Type PV-KBT4/6 II for Positive and PV-KST4/6 II for Negative.
These are required by the standard AS5033 as this standard does not allow the mixing of brands.

These connectors are not provided with the new product.

What CEC accreditation is required to install/service Schneider Electric Grid Tie Inverters in Australia?

The installation and service of Schneider Electric Xantrex GT, Conext RL, Conext TL and Conext CL Inverters must be undertaken and completed by a CEC - Grid Connect Inverter accredited solar installer/service agent.

This is a safety requirement as failure to follow installation instructions could result in death or serious injury in addition to voiding terms of warranty.

Installing solar systems requires knowledge and experience with PV array design, installation and configuration to avoid potential catastrophic failure.

What is the function search mode on my XW series inverter?

 Search mode allows the inverter to selectively power only items that draw more than a certain amount of power, which can result in power savings. The Xantrex XW Series has a no-load power draw of about 28 watts. Enabling Search mode reduces this power draw to less than 8 watts. Search mode operates differently in single-unit and multi-unit installations. When a single Xantrex XW Series has Search mode enabled, the inverter sends electrical search pulses through its AC output. These search pulses “look” for connected AC loads. The delay between search pulses is set using the Search Delay setting. After a load larger than the Search Watts setting is detected, the inverter turns on.

For Multiple units

To use Search mode in multiple-unit installations with paralleled Xantrex XW Series units, the master unit must have Search mode disabled. Slave units must have Search mode enabled. When Search mode is disabled on the master unit and Search mode is enabled on slave units, only the master Xantrex XW Series operates, and the slave units come on-line only when the load exceeds approximately 60 per cent of the rated output of the master unit. In a three-unit system, the third slave unit turns on if the load on the master does not drop below 60 per cent about 3 to 5 seconds after a slave unit turns on to assist the master. When the load drops below 20 per cent of the master’s rated output, the slave units turn off in reverse order; that is, the last slave unit to turn on is the first to turn off.

When to set up Search mode

The Search mode feature is only valuable if the inverter can spend a fair amount of time “sleeping” each day, i.e. no AC loads whatsoever. Therefore, if Search mode is to be utilized it must be adjusted properly. The initial adjustment should be made so that the inverter comes on only when needed. Certain types of loads can cause Search mode not to work as expected.  

If these kinds of loads are in the system, follow the suggestions given to eliminate the
problem. If the problem loads cannot be eliminated, there are two work-around solutions:

1. Disable Search Mode from the main Xantrex XW Series Setup menu, causing the inverter to always remain at full output voltage.

2. Use a search-friendly “companion load” whose only purpose is to be switched on to “wake up” the inverter to power the load that is unable to bring the inverter out of Search mode. 

Note : 
Some appliances will not operate when using search, such as the clock on a microwave or a fridge (has to monitor temp to know when to run compressor).

Is there any Xantrex support in New Zealand ?

For Xantrex branded products, they are supported locally by Xantrex's authorized distributor, Advance Trident.

Advance Trident ltd (ATL)
173 Marua Road
Mt Wellington, Auckland 1051
PO Box 4174
Shortland St
Auckland 1140
New Zealand
Phone      +64 9 845 5347 ext 2
Head Office Sales: 
+64 9 845 5347 | South Island Sales: +64 27 449 0033

Note:  Although Xantrex is owned by Schneider, they treat it separately.  That's why they have an authorized distributor in NZ.


Video: Enabling Sell Mode on the Xantrex XW Hybrid Solar Inverter/Charger

1) Enable Grid support in XW basic setup menu
2) Set Grid Support Voltage to 64V (32V for XW4024) and enable SELL in XW Advanced - Grid Support menu (only if firmware on the XW inverter/charger is 1.07)
3) Verify XW CHARGE CYCLE is '2Stg/NoFloat' in XW Advanced - Charger Settings - Charge Cycle (factory default setting)
4) On MPPT set CHARGE CYCLE to '3 stage' in MPPT Advanced - Charger Settings - Charge Cycle 
5) It is also recommended that the system has a minimum battery capacity of 200Ah. An additional 100Ah for every 1kW of solar power is preferable.

Difference between SW, SWPLUS and Power Panel products.

Here are the major differences between the products.

Power Panel is the complete kit. It's a special order item, not generally stocked by dealers and distributors.

SWPlus is a more customizable product; it's for tinkerers; if you don't know what parts you need you will need a dealer/installer guiding you through the installation.

SW series is a product which includes the disconnect, but you need the DC and AC wiring.

For more detail on installation and application questions, we strongly recommend that you speak to a Xantrex Certified Dealer. The link to locate one in North America is here:

What is the difference between the old SCP and new SCP (System Control Panel)?

The old SCP (865-1050) is used to configure the original XW and SW inverter charge units, with the addition of newer features implemented by the updated firmware of these units, though the old SCP can only be firmware
 upgraded so far to the point where it could not configure a good deal of the new features.
The new SCP (865-1050-01) has all the same programming capabilities as the old SCP but also includes the ability to program the new features included with the updated firmware found on the XW and SW inverter charge units.

It is advised that if you have the old model SCP, to replace it with the new SCP.

Sump pumps and inverters

Sump pumps are one of the most common backup requirements for Xantrex customers.

In order to help you plan, size and install your Xantrex solution for your sump pump backup requirement, you will probably need to do a little research.

Sizing the inverter

It is true that 1 horsepower equals 748 watts in all the conversion tables; this doesn't mean that a 1000 watt inverter will run a 1 horsepower motor. Motor loads frequently surge 4 - 6 times their rated running load; and the 748 watts is measured at the output shaft of the motor, not taking losses into account.

In our experience, customers should not try to run a one horsepower motor on anything smaller than a 2500 watt inverter, to account for both the surge and running loads.

As a rule of thumb:

1/4 horsepower motor = at least 1000 watts continuous inverter
1/2 horsepower motor = at least 1500 watts continuous inverter
1/2 - 1 horsepower motor = at least 2500 watts continuous inverter

More than 1 horsepower = speak to the manufacturer of the motor and see if you can get the locked rotor amps for the motor (or the wattage of the startup surge load), which will help a technician assist you in sizing the inverter.

Sizing the battery bank

To find out how big a battery bank you need, determine the following:

How many hours, minimum, you want the sump pump to run
The duty cycle of the sump pump (how many minutes per hour the sump pump is running in the worst case scenario)
The rated running load in watts or amps of the sump pump.


You want the sump pump to run for 4 hours.
It will be running 50% of the time - so effectively you need about 2 hours of battery capacity.
The rated running load of the sump pump is 7.1 amps ac.

Amps convert to watts with the formula 120 x #of amps, in this case 120 x 7.1, yielding 852 watts.

The battery calculator is located on the Xantrex website at

Your battery bank will likely be 12v. If you enter 200 amp hours of battery capacity, and enter 852 watts as the load, and click on "Calculate" you find to your surprise that you will not get 2 hours of run time. Doubling the battery amp hour capacity gives you just over 2 hours of run time, or 4 hours of service based on 50% cycle time.

Possible solution:

2500 watt inverter (Xpower 3000, PROwatt 3000)
Xantrex Truecharge 20+ battery charger
Automatic transfer switch
400 amp hour battery bank
Heavy duty cabling, 400A fuse and fuse block

Total cost (retail) between $1500 and $2000, not including shipping, taxes, inspection or installation.

Putting the system together

If you want the system to be automatic - in other words, you don't have to be in the house for it to start working in the event of a power failure - you will need to purchase an inverter/charger, or a standalone inverter with a transfer switch, or purchase the transfer switch separately. You will need to purchase an appropriately sized battery bank, and if you don't get an inverter charger, a battery charger which will charge the batteries when not in use.

Sump pumps do not require true sine wave to start and function properly.

Many sump pump manufacturers market backup power solutions tailored to their products and customers; however, please remember that turnkey solutions are generally more expensive than systems you put together yourself.

What kinds of support are available for my Solar products?

Customer is looking for support on a Schneider Electric Solar product.

Product Line:
Conext Inverters (XW+, XW, SW, GT, TX, XC, GT 3ph), Conext Accessories, Solar products

Any Schneider Electric Solar solution.

Customer has experienced an issue or has a question on a Solar product.

  1. What hours are the phone support lines open?
    • Monday - Friday -- 6:30 AM - 4:30 PM Pacific

  2. What if my Solar product says Xantrex on the cover?
    • All Xantrex products that were certified for residential or commercial use are supported (products for the mobile market are still supported by Xantrex).

  3. Where are my shipping labels for my warranty replacement unit?
    • Shipping labels are approved on a case by case basis.

  4. What support is offered for 3rd party products that directly attach to a Solar product (i.e. - Midnite Solar E-panel).
    • We are unable to provide support for products that are not part of the Schneider Electric portfolio.

  5. Where can I request additional training on Schneider Electric products?
    • Please call 1-888-778-2733 and use option #3.

  6. Where can I find product documenation or general product information?

  7. Who can service or repair my Solar product?
    • Please call for assistance in locating the nearest Authorized Service Center (ASC) for your product.

  8. Where can I find pricing or availability for a Solar product?

  9. How can I provide feedback on Solar products or submit a feature request?

Customize Widget for Gateway

There are times when a customer, normally a dealer, will want to rebrand the Yahoo Widget.

In order to do so, you will need a software designer who is somewhat familiar with JavaScript. You will also need a graphics designer who can scale your logo images to the appropriate size and convert them to .png file format.


A widget file is nothing more than a zip file containing the JavaScript code which is interpreted inside the engine. The data files, including all the graphics, are also bundled in the zip file. The zip file is unpacked into C:\Documents and Settings\<user name>\Local Settings\Application Data\Yahoo\Widget Engine\Unzipped. Browse through the directory structure and you will find a directory with Xantrex branding image files.


Please go to the Yahoo! Widget web site at and click on the "Create Widgets" link in the header for more information. It shouldn't take more than a day to change the branding of the widget.

Why does my Conext XW+ Solar Inverter show a W96 when trying to equalize?

Customer is reporting a W96 when trying to equalize

Product Line:
Conext XW/XW+
Conext SW

Installation Support

Change battery type if your batteries should be equalized. Gel or AGM batteries should not be equalized. 
Check for presence of AC. Make sure Charge and Equalize are enabled. Verify the Xantrex XW AGS trigger is set to Stop Float. If Stop V is enabled, then the voltage level should be above the Eqlz Voltage level. 
Make sure that the charging is not blocked by either the Charge Block setting or by Load Shave.  When Load Shave is Enabled, the charger is effectively disabled until the batteries get close to LBCO.

Solar Customer Support can be obtained here:

 No qualified AC power source, AC input is not qualified, or the charge setting is not adequate. 
The selected battery type should not be equalized.

Understanding AC voltage faults


Grid tie inverter offline and display indicates AC Voltage Fault


Single-phase Xantrex GT or Schneider Conext TX  inverter


A) If the 'AC VOLTAGE FAULT' display is permanent, contact installer and have the AC overcurrent fuse tested for continuity.

B) If the fault is intermittent, the unit is functioning as programmed and responding to unsuitable grid conditions as required by national safety standards. The unit will restart once grid conditions improve. If the fault occurs often, contact the electrical power provider. If the utility company acknowledges the line voltage is abnormally high (>126VAC L-N) and can provide permission to adjust the anti-islanding settings, then Schneider Electric Technical Support personnel can set the installer up with special software that will allow those limits to be adjusted. Call 866-519-1470 M-F 6:30A-4:30P PST.


A) AC fuse opened due to current overload.

B) Unit is shutting down in response to unsuitable grid conditions as required by the UL1741 safety standard.

Will MPPT80 generate ground fault with floating array?

Will MPPT80 generate ground fault with floating array?


Installation may require floating array


HV solar controller


On pg.2-8 of the installation guide, it states the MPPT80 can detect a ground fault when using ungrounded array :


For ungrounded arrays, the unit detects the resistance between the


array and ground, and it indicates a fault if the resistance is too low. The unit is


configured at the factory for an ungrounded PV array connection. For both types


of ground fault protection, if the unit determines that a ground fault has occurred,


it will cease operating and will indicate a fault on the unit's display and over the


Xantrex Xanbus? network (if used).



Ground fault detection circuitry is active when using ungrounded array. Both polarities must be fused externally, a single disconnect (SquareD H361) may be utilized (see attached)

Bluetooth Wireless Installation for RS-232 to USB GT Monitoring


The following is for informational purposes only. Schneider Electric does not specifically endorse nor exclude any 3rd party manufacturer. Many of our customers are looking for ways to monitor their Conext / GT inverter wirelessly.


Conext GT and GT 1-phase Inverters only


Some of our customers have found bluetooth devices by the following company to be suitable


1. To install your AirCable Bluetooth RS-232 to USB adapter, first connect the AirCable Serial to the GT inverter's RS-232 port. Now connect the supplied AC power cord from the power plug to the AirCable Serial device. 

2. Now, connect the AirCable USB device to your computer. The blue light on the AirCable USB will begin to flash, then will come on solid. After a few seconds, the The Hardware Wizard will automatically open. The wizard will ask if you want Windows to connect to Windows Update to search for software. Click 'Yes, this time only'. 

3. The wizard will tell you to insert the driver disk (it is provided with the hardware). Insert the driver CD. Wait for the wizard to recognize the disk and install the drivers. 

4. If the wizard tells you that the software has not passed the "Windows Logo Test", ignore it and click 'Continue Anyway'. 

5. Finsh Installation.

Now, go to your Windows Start menu and click 'Control Panel'.


Click on 'Ports' to expand the dropdown menu and take note of which COM port is labeled 'AirCable'.


1. Now, download the Conext or GT view software from the Schneider Electric Solar website at

For Conext :

For GT :

2. Once downloaded, click 'Open', then double click the 'SETUP' icon (the one that looks like a window).

3. Your security settings may tell you that the publisher cannot be verified and ask you if you wish to proceed with the installation. Click 'Run'.

4. The Installation Wizard will open and display the Schneider Electric or Xantrex logo and copyright information. Click 'Next'.

5. The next screen will read "Welcome to Conext or GT View setup...' Click 'Next'. 

6. Accept the terms and conditions. Click 'Yes'.

7. It will ask you where you would like to store the files. Leave the default file path, or type in you preference and click 'Next'.

8. It will ask you which folder you would like the icons to be save in. Leave it at the default or enter your preference and click 'Next'.

9. Click 'Next' again to begin copying the files.

10. The installation Wizard will tell you when it has finished. Click the 'Finish' button.

11. Now you can go to the folder where the GT View software was saved
(default is C:\Program Files\Xantrex\GT-View. Double click the blue and gray 'X' icon labeled GT View to open the GT View window.

12. Right-click anywhere on the GT View window and click Settings. Under the System Options section, select the COM port which was labeled as AirCable, then click 'OK'.

13. After a few seconds, the GT View window should begin displaying your system information.



Glossary of Power Terms

Absorption Charge
The second stage of three-stage battery charging. Voltage remains constant and current tapers as internal battery resistance increases during charging. This ensures complete charging.

Alternating Current (AC)
The type of electrical power supplied by the power utility. The unique characteristic of this form of electricity is that it reverses direction at regular intervals. For example, 120 Vac 60 Hz power reverses flow 60 times a second, hence the rating 60 Hz (cycles).

Ambient Temperature
Refers to the air temperature around the inverter and batteries, which will affect the output power of your system.

Amp/Ampere (A or I)
A measurement of the flow of electrical current. One amp is equal to the electric force of one volt acting across the resistance of one ohm.

Amp Hour (Ah)
One amp of electrical current flowing for one hour. Expresses the relationship between current (amps) and time. (Ohm's law: A = V/R)

Amp Hour Capacity
The ability of a fully charged battery to deliver a specified quantity of electricity (Amp-Hr., Ah) at a given rate (Amp, A) over a definite period of time (Hr.). The capacity of a battery depends upon a number of factors such as: active material, weight, density, adhesion to grid, number, design and dimensions of plates, plate spacing design of separators, specific gravity and quantity of available electrolyte, grid alloys, final limiting voltage, discharge rate, temperature, internal and external resistance, age and life of the battery (or battery bank).

The current-carrying capacity of an electrical conductor or device, expressed in amperes.

AGM (Absorbed Glass Mat) Battery
A lead acid, maintenance-free battery.

A group of solar electric modules wired together.

AWG (American Wire Gauge)
A standard used to measure the size of wire.


Battery Charger
A device that is used to replenish the capacity of a battery (its ?charge?) by supplying DC current to the battery.

Bulk Charge
The first stage of three-stage battery charging. Current is sent to batteries at the maximum rate they will accept while voltage rises to full charge level.


An electric circuit is the path of an electric current. A closed circuit has a complete path. An open circuit has a broken or disconnected path.

Circuit (Series)
A circuit which has only one path for the current to flow. Batteries arranged in the series are connected with the negative of the first to the positive of the second, negative of the second to the positive of the third, etc. If two 6-volt batteries of 50 amp-hours capacity are connected in series, the circuit voltage is equal to the sum of the two battery voltages, or 12 volts, and the amp-hour capacity of the combination is 50 amp hours.

Circuit (Parallel)
A circuit which provides more than one path for current flow. A parallel arrangement of batteries (of like voltage and capacity) would have all positive terminals connected to a conductor and all negative terminals connected to another conductor. If two 12-volt batteries of 50 amp-hour capacity each are connected in parallel, the circuit voltage is 12 volts, and the amp-hour capacity of the combination is 100 amp hours.

The rate of flow of electrical charge. The flow of current is measured in amps.

In a battery, one discharge plus one recharge equals one cycle.


Deep Cycle
A deep cycle occurs when a battery is discharged to 50% of its capacity (50% depth of discharge). A deep-cycle battery is one that is intended to be deeply discharged and charged repeatedly.

Depth of Discharge (DOD)
The amount of energy or charge removed from the battery bank, usually expressed as a percentage. A depth of discharge of 0% indicates a fully-charged battery, and a depth of discharge of 100% indicates a fully-discharged battery.

Direct Current (DC)
The type of electricity stored in batteries and generated by solar electric devices. Current flows in a single direction.

When a function is disabled, it is not allowed to occur and if it is occurring, it is terminated. Regardless of other conditions, the function will not be activated. For example, even if AC power is present, if the charger is disabled, the unit will not charge. The charger must be enabled. See ?Enable? in the glossary.

Stored energy being released from a battery.

DC Loads
These loads are those that run off a DC electrical system (battery). A few examples of DC loads are pumps, lights, fans, power vents, toilet, inverters, and some water heaters. DC loads rely on the batteries for power.


Echo Charger
Auxiliary charger that can charge your engine battery when the main charger is in
Bulk or Absorption mode and the house battery voltage is at 13.2 volts DC or higher.

A conductive medium in which the flow of electricity takes place; this is the liquid found inside storage batteries.

When a function is enabled, it is allowed to occur but other conditions may have to be met before the function is activated or turned on. For example, the charger function on the MS2000 may be enabled, but it will not charge unless qualified AC power is present.

Engine Battery
A battery that is separate from the House battery, specifically designated to provide power for engine starting. In a system with a house battery and an engine battery, the inverter would not have its main power cables connected to the engine battery.

Equalization or Equalize Charge
A deliberate, controlled overcharge of the batteries which brings all cells up to the same voltage potential, reduces sulfation and stratification in flooded (or wet) lead-acid batteries. Not necessary and harmful on Gel or sealed batteries.


Float Charge
The third stage of three-stage battery charging. After batteries reach full charge, the charging voltage is reduced to a lower level to reduce gassing (boiling of electrolyte) and prolong battery life. This is often referred to as a maintenance charge, since rather than charging a battery it keeps an already-charged battery from self-discharging.


Gel Cell Battery
A type of battery that uses a gelled electrolyte solution. These batteries are sealed and are virtually maintenance free. Not all sealed batteries are the gel cell type.

When used in reference to utility power, it refers to a system of electrical transmission and distribution lines.

Grid Tie
An electrical system that is connected to a utility distribution grid. For example, Xantrex SW line tie inverters are designed to connect to and interact with utility power.

The reference potential of a circuit. In automotive use, the result of attaching one battery cable to the body or frame which is used as a path for completing a circuit in lieu of a direct wire from a component. This method is not suitable for connecting the negative cable of the inverter to ground. Instead, route the cable directly to the negative terminal of the battery.

Ground Fault Circuit Interrupter (GFCI)
A protective device that rapidly de-energizes a circuit when current to ground exceeds a predetermined value.

Ground Fault Protection (GFP)
A circuit protection device that prevents the flow of electrical current to earth if a short circuit is present. Usually required in wet locations, for example, for outdoor, kitchen, and bathroom circuits.


Hertz (Hz)
The frequency, or number of times per second, that the flow of AC electricity reverses itself. Also referred to as cycles (see "alternating current").

High Battery Protection
A control circuit that disconnects charge current flowing to batteries when voltage reaches a dangerously high threshold. Prevents damage created by excess gassing (or boiling) of electrolyte.

House Battery
The house battery is the large capacity, deep cycle battery that is connected to the inverter/charger's main DC terminals.

Hybrid Systems
These are systems that combine two or more renewable energy technologies. A combination photovoltaic and wind system, or a photovoltaic system that recovers and utilizes heat from the panels for space or water heating are hybrid system examples.

A simple device that measures the specific gravity of battery electrolyte. Specific gravity readings express state of charge/discharge of battery.


Idle Current
The amount of electrical power required to keep an inverter ready to produce electricity on demand.

Inductive Loads
TVs, VCRs, stereos, computers, and electric motors (power tools, vacuum cleaners, for example) are examples of inductive loads which surge on start up. They require a high start-up current compared to a resistive load such as a toaster or a coffee pot.

Inrush Current
The peak power that a load will draw at the instant that it starts up.

A device that converts DC power to AC power.


Kilowatt (kW)
One thousand watts of electricity. Ten 100-watt light bulbs use one Kilowatt of electrical power.

Kilowatt hour (kW/h)
One kW of electrical power used for one hour. The most common measurement of electrical consumption, most grid connected electrical meters measure kWh for billing purposes.


Light Emitting Diode (LED)
A device used to display various status functions.

Line Loss
A voltage drop caused by resistance in wire during transmission of electrical power over distance. Line loss is why you must increase the size of DC battery cables the further the inverter is from the battery or battery banks.

Line Tie
An electrical system that is connected to a utility distribution grid. For example, Conext CL line tie inverters are designed to connect to and interact with utility power.

Any device that consumes electricity in order to operate. Appliances, tools, and lights are examples of electrical loads.

Low Battery Protection
A control circuit that stops the flow of electricity from batteries to loads when battery voltage drops to low levels. This prevents over-discharge of the batteries.


Main Charger
The main charger output is at the main DC terminals on the inverter/charger and connects to the house batteries. The main charger replenishes the charge to the house batteries. The main charger can be configured as a two stage or a three-stage charger.

Maximum Power Point Tracking (MPPT)
Every PV (solar electric) device has a point where maximum current is delivered. MPPT electronically adjusts the output of a PV device to the maximum power point.

Modified Sine Wave (MSW)
An AC wave form (generated by many inverters) that is a pulse width modified square wave.


National Electric Code (NEC)
The electrical wiring and installation standards used in the United States.

Designating or pertaining to electrical potential. The negative terminal is the point from which electrons flow during discharge.


Off Grid
An electrical system that is not connected to a utility distribution grid.

A unit for measuring electrical resistance.

Ohm's Law
Expresses the relationship between voltage (V) and current (I) in an electrical circuit with resistance (R). It can be expressed as follows: V=IR. If any two of the three values are known, the third value can be calculated by using the above formula.

A device that displays the wave form created by an electrical generating device such as a generator, inverter, or utility.

Overload/Overcurrent Protection
A control circuit designed to protect an inverter or similar device from loads exceeding its output capacity. (A fuse, for example, is an overcurrent protection device.) All Xantrex inverters have internal circuitry to protect themselves from most overload/overcurrent conditions.


Parallel Wiring
A group of electrical devices, such as batteries or PV modules, wired together to increase ampacity, while voltage remains constant. Two 100 amp hour 12 VDC batteries wired in parallel will form a 200 amp-hour 12 VDC battery bank.

Photovoltaic (PV) Panels
These are the devices that convert sunlight into electricity.

Photovoltaic (PV) System
The components that form a solar electric generating system, usually consisting of PV modules, charge controller, circuit protectors (fuses or breakers) and batteries.

A battery is made up of lead plates separated by an electrolyte solution. The electrolyte solution chemically reacting with the lead plates causes the flow of electrons known as electric current.

Designating or pertaining to electrical potential; opposite of negative. The positive battery terminal is the point where electrons return to the battery during discharge.

Power Factor
Power factor is the ratio between true power (Watts) and apparent power (Volt Amps)

Power Sharing
The feature of the charger to reduce its output when the AC power being consumed by the charger and external AC loads connected to the output of the inverter are in excess of the input breaker rating.


Resistive Loads
Toasters, coffee pots, and incandescent lights are examples of resistive loads. They use a resistive heater element to generate heat or light.

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Series Wiring
A group of electrical devices, such as batteries or PV modules, wired together to increase voltage, while ampacity remains constant. Two 100 amp hour 12 Vdc batteries wired in series form a 100 amp hour 24 Vdc battery bank.

Sine Wave
The optimal output wave form of alternating current (AC). A smooth wave going above and below zero.

As a battery discharges, its plates become covered with lead sulfate. With regular recharging, the lead sulfate leaves the plates and recombines with the electrolyte. If the lead sulfate remains on the plates for an extended period of time (over two months), it hardens, and recharging does not remove it. Sulfation reduces the effective plate area and the battery's capacity. Equalization of flooded (or wet) batteries helps to reduce sulfation.

Surge Capacity
The amount of current an inverter can deliver for short periods of time. Most electric motors draw up to three times their rated current when starting. An inverter will 'surge? to meet these motor-starting requirements. Schneider Electric inverters have surge capacities at least twice their continuous ratings, and many surge to three times their continuous ratings.

Over time, electrolyte tends to separate. The electrolyte at the top of the battery becomes watery while it becomes more acidic at the bottom. This effect is corrosive to the plates. Equalization of flooded (or wet) batteries helps reduce stratification.


Temperature Compensation
Optimal battery charging voltage is dependent on the battery temperature. As the ambient temperature falls, the proper voltage for each charge stage needs to be increased. When the ambient temperature increases, the proper voltage for each charge stage needs to be decreased. On some products, the Battery Temperature Sensor (BTS) allows the charger or inverter/charger to automatically scale charge-voltage settings to compensate for ambient temperatures. On others, there is a setting for hot, cold, and warm settings.

Transfer Switch
A switch designed to transfer electricity being supplied to loads (appliances, for example) from one source of power to another. A transfer switch may be used to designate whether power to a distribution panel will come from a generator or inverter.

Trickle Charge
Trickle charging, also called float charging, means charging a battery at the same rate as the rate of self-discharge. All batteries self discharge over time.

TSC (Temperature Sensitive Charging)
The ability of the charger to adjust its charging voltage based on the temperature sensed at the battery bank if a temperature probe is used.


Volts (V)
A unit of measure of the pressure in an electrical circuit. Volts are a measure of electric potential. Voltage is often explained using a liquid analogy, comparing water pressure to voltage: a high pressure hose would be considered high voltage, while a slow-moving stream could be compared to low voltage.

Volt-amps (VA)
A measure of the apparent power equivalent to the true power (watts) in resistive loads, but exceeding watts in non-resistive loads. VA is calculated by multiplying volts times amps without using power factor.


Watt(s) (W)
A quantitative measurement of electrical power taking into account power factor. Watts are calculated by multiplying volts times amps times power factor. (watts = volts × amps × power factor)

Watt Hour (W/h)
Electrical power measured in terms of time. One watt hour of electricity is equal to one watt of power being consumed for one hour. A one-watt light operated for one hour would consume one watt hour of electricity.

Wet Cell Battery
A type of battery that uses liquid as an electrolyte. The wet cell battery requires periodic maintenance: cleaning the connections, checking the electrolyte level and performing an equalization cycle.

Wind Energy Conversion System
Usually known as a windmill or a wind turbine. WECS convert energy from the wind into electricity. A complete set of components may include the following components: Wind Turbine, wiring, inverter, controller, batteries and other components depending upon the sophistication of the system.


Xanbus is a network communications protocol, developed by Schneider Electric.