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Genasun Overdrive (GO)
for GV-5 and GV-5-MOD


It is now available, for all GV-5 and GV-5-MOD controllers, the new Genasun Overdrive (GO) feature. This feature can be included in the firmware with the Custom Voltage (CV) version, part numbers GV-5-Pb-CV, GV-5-Li-CV, and GV-5-MOD-CV. This feature is in addition to all the other Genasun capabilities that make the GV-5/-MOD unique products in the off-grid market.


The GV-5 and GV-5-MOD are still rated with a max output current of 5 A, but GO allows the charge controller to be paired safely with panels/arrays providing up to 15 A of current without reducing the charge controller’s efficiency or performance. Oversizing your panels/array will ensure more energy delivery to the battery when you need it most, for example, during months with lower solar irradiations or in the early and late hours of the day.


What makes GO unique and when is it useful to use?


Most of the charge controllers on the market can shave power off oversized solar panels for a limited period by over-warming the controller, which affects their performance and longevity. GO allows the GV-5 and GV-5-MOD to handle “unlimited power” and keep the controller in a safe condition and operating at full efficiency. While this means that larger panels will be significantly limited, there are situations in which GO can provide important advantages:

  1. Why get a larger controller if you can use the Genasun Overdrive – Off-grid solar systems are designed to account for periods with lower solar irradiation.  This type of system design requires a larger solar panel to compensate for the periods of low solar irradiation, and the larger panel requires the use of a larger charge controller.  But now, the GV-5 and GV-5-MOD with GO can handle a 36-cell panel/array of up to 15 A to get the maximum power available from the panel/array in the winter, and GO will manage the extra power the system collects in the summer.
  2. More solar energy in the early or late hours of the day – The energy produced by a solar panel follows a bell-shape Gaussian curve. Oversizing the panel makes it possible to enlarge the curve, providing more energy to the battery in the early and late hours of the day.
  3. Keep your battery charged with a constant current – Use the GV-5 or GV-5-MOD with GO to provide a constant charge of 5 A to unattended systems with a steady power draw where it’s important to get continuous charge current from the solar panel even in the worst conditions. The GV-5’s limited output is also important for many lower capacity Lithium battery configurations that require a low charge current to prevent damaging Lithium cells.
  4. Extend the battery lifetime – The battery pack is still one of the more expensive components of an off-grid solar system, while panels keep getting cheaper. Using the GV-5 or GV-5-MOD with GO paired with large (or multiple) panels can reduce deep discharge events of the battery in the worst periods of the year, consequently improving performance and extending the battery’s longevity.

With the introduction of Genasun Overdrive, the GV-5 and GV-5-MOD monitor the input current every 5 ms, slightly increasing its self-consumption to 190 uA, which remains the lowest self-consumption on the market by far. A few other changes have been applied to the manual with the introduction of GO, as well.  For example, the LED status indicators work somewhat differently in units with the GO update. Please refer to the latest manual for more details.


If you have questions about Genasun Overdrive, please drop us an email as always.