GVB-8-Li-36v Solar MPPT Charge Controller

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This is the legendary Genasun GVB charge controller. It's perfect for charging lithium batteries directly from solar power; you simply plug in a solar panel on one side and a battery on the other. They function at 96-99% efficiency and carry a 5 year warranty. We sell the waterproof version made for charging lithium batteries: 36v, 48v, and 52v (If you need a custom voltage charge controller, contact us for more details). 

This page is for the 36v (10s) version.


Ships from us with Anderson Powerpole connectors on both the solar power in and battery power out for ease of setup. 


^Anderson Powerpole connectors.

From the manufacturer:

"Genasun GVB-8 (Boost) 105-350W MPPT Solar Boost Charge Controller for Lithium Batteries

Want to see a 27V grid-tie panel charge a 48V battery pack? Get a GVB.
Most solar charge controllers move power from a higher voltage panel to a lower voltage battery bank.  The GVB-series controllers, in contrast, pump electricity up hill. These controllers will take a lower voltage panel and boost the voltage to charge a 24V, 36V or 48V battery pack.  In fact, the GVB's will work with almost any panel that's below your battery voltage. Larger panels are cheaper per Watt than smaller panels, so using one large panel and a boost controller results in a significantly lower system cost than smaller panels in series with a conventional charge controller.

Mission-Critical Reliability
Genasun controllers are deployed to the most remote locations on earth. They endure years at sea, harsh Antarctic winters, freezing conditions in the upper atmosphere on solar powered airplanes, and in a few off-the-map locations. Made in the USA, each controller is put through complete electrical testing to ensure reliability. If you need mission-critical power, this is your controller.

High-Speed MPPT: Always on Target
Not all Maximum Power Point Tracking controllers were created equally. Most use a sweep and sleep method that scans the entire voltage range every 30-60 seconds. That's okay for a clear day, with a stationary panel. But moving vehicles and changing cloud cover require a faster, more advanced controller. Genasun controllers adapt to changing light conditions 15 times every second. They are always on target, capturing every bit of available sunshine. Simply put, other controllers can't keep up.

Advanced Lithium Charging Algorithms
Drawing on more than 10 years of advanced lithium battery and controller development, Genasun offers a complete line of lithium solar charge controllers. These units employ industry-standard Constant-Current Constant-Voltage (CC/CV) charging for widest battery compatibility.

Custom Voltages Available
Genasun stocks the GVB-8 (Boost) in 12V, 24V, 36V, and 48V nominal charge profile for LiFePO4 batteries. The standard float voltages correspond to 3.55V per cell for compatibility with most batteries (check with your battery manufacturer to be sure). Custom voltages can be programmed at the factory to match the float Voltage (CV voltage) of your battery. For ordering a Custom Voltage controller please contact us with your desired voltage, and we will be in touch with ordering details. 

Made in the USA

LED Display
The built-in LED will quickly tell you that you've installed the controller correctly. Simple to read, it will also let you know when the battery is charging from solar power, and when the battery has reached full charge.

Marine Grade: Reliable Power After Years at Sea
Genasun Boost controllers provide reliable power in the harshest environments on earth. GVB's have been powering boats on round-the-world sailing races for years.

No Fans. No Relays.
Fans get clogged with dust and dirt. Relays eventually stop switching. Genasun controllers use advanced electrical design that obsoletes these parts. With fewer moving parts to wear out, Genasun controllers outlast the competition.


  GVB-8-Li-14.2V GVB-8-Li-28.4V GVB-8-Li-41.7V GVB-8-Li-56.8V GVB-8-Li-**.*V
Rated Panel (Input) Current: 8A*
Minimum Panel Voltage for Charging: 5V
Minimum Battery Voltage for Operation: 9.5V
Recommended Max Panel Voc at STC: 50V
Absolute Maximum Panel Open-Circuit Voltage (Voc): 60V
Input Voltage Range: 0-60V
Maximum Input Short Circuit Current**: 8A*
Maximum Input Current***: 15A
Charge Profile: CC/CV
Nominal Battery Voltage: 12V 
4S LiFePo4
8S LiFePo4
16S LiFePo4
(See specs for closest equivalent.)
Maximum Recommended Panel Vmp: 14V 28V 39V 43V
Maximum Recommended Panel Power (8A Panel w/~155mm cells):

For higher power controllers, please visit the Blue Sky Energy Product Page.
105W 210W 325W 350W
Float/CV Voltage: 14.2V 28.4V 41.7V 56.8V **.*V 
as specified in part number
Electrical Efficiency: 95%-97% typical 96%-98% typical 96%-98% typical 96%-99% typical (See specs for closest equivalent.)
Night Consumption: 7mA 6mA 6mA 5mA
Tracking Efficiency: 99+% typical
MPPT Tracking Speed: 15Hz
Environmental Protection: IP40 (Terminals Nickel Plated)
Connection: 4-position terminal block for 10-30AWG wire
Certifications: cETLus Safety, Recognized Component cETLus HazLoc (C1D2), CE, FCC, RoHS
Weight: 6.5oz., 185g
Dimensions: 5.5x2.5x1.2", 14x6.5x3.1cm
Warranty: 5 years

*Panel ratings have increased since we designed the GVB. Although we don't believe in changing specifications without a corresponding engineering change, based on both our customers' experiences over the years as well as the headroom we designed into the GVB, we feel comfortable recommending the GVB for panels with Imp up to 9A.
**Panel Isc. Maximum input power and maximum input voltage requirements must also be respected.
***Maximum current that the controller could draw from an unlimited source. This specification is not intended for determining PV input.

Download the Manual: GVB-8 (Boost) Manual (197 downloads)

Download the Datasheet: GVB-8 (Boost) Datasheet (151 downloads)

If you have any questions please visit our FAQ

The GVB-8 (Boost) solar charge controllers carry a 5-year warranty on materials and workmanship. Genasun’s warranty does not cover damage due to abuse or operation beyond the rated specifications."