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These combined sinewave inverters/battery chargers are powerful, efficient & reliable. They  use advanced technology to give a harmonic true sinewave 230Vac output with power quality equal to the grid.    
This enables all standard appliances including sensitive equipment such as computers, radio, audio and satellite equipment to be powered without interference.  They have high overload capability, so even big motors and fridges can started, combined with low standby power draw for constant connection.  When supplied with generator or grid power they operate as powerful battery chargers making them ideal for use in back-up power or generator systems.  Extremely quiet and easy to use with fully automatic functions.


  • Input Voltage: 9.5-16.0 ; 19-32 ; 38-64 VDC)
  • Output Voltage: 230 Vac (+/- 10%)
  • Output Frequency: 50Hz +/- 0.5%, true sinewave
  • Power draw in standby/sleep mode: < 1.5W.
  • Load sensing: 1 to 25W (adjustable)
  • Overload Capability: max. 250% max 300%
  • Max. Efficiency: approx. 95%
  • Warranty: Two years.


  • Low Battery
  • Overload
  • Reverse Polarity
  • Short Circuit
  • Over-temperature

Units automatically shut down if any of the above occur, In the event of an overload the inverter tries to restart four times. If the fault is not removed the inverters switch off.  LED indicators show the fault condition and re-start is then by on/off switch.  In the event of low battery or over-temperature the inverters switch off and wait until the battery is recharged or inverter cools down before automatically restarting.

Xtender Series

The Xtender series provides an unmatched freedom of use due to its many functions. In a basic application, it offers a total package: the functions of inverter, battery charger, transfer system and assistance to the source. These functions can be combined and controlled in a totally automatic way for exceptional ease and optimal management of available energy.

Its programmable auxiliary contacts also permit interconnection with existing systems or the implementation of extended functions. Fully programmable by means of its remote control, it enables the software update; thus making it an upgradeable product to which new functions may be added further on. Through the implementation of several units, it is possible to create a 3-phase source or to set them in parallel, in order to increase the power available. Up to 9 Xtender series inverters can then be combined together.


  • True sine wave voltage.
  • Reliable and silent with any kind of load.
  • Outstanding overload capabilities.
  • Smart-Boost function for assistance to the source even with difficult loads.
  • Automatic reduction of peak loads (power shaving).
  • Multi-stage programmable battery charger with PFC.
  • Stand-by level adjustable over a large range and from a very low threshold.
  • Ultra-fast transfer relay.
  • Control by digital signal processors (DSP).
  • High efficiency.
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Product Code Description Retail Price
(ex VAT)
XTS-900/12 Studer Xtender 900W, 12V, 0-35A battery charger £400.00


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Product Code Description Retail Price
(ex VAT)
RCC-02 Remote Control, 2m cable, Wall Mount for XTS Inverters £334.57
TCM-01 Communication & Real Time Clock For XTS Inverters £50.00