GVB-8 (Boost)
105W/210W/325W/350W | Solar charge controller with MPPT

The industry's most efficient boost controllers. These controllers boost lower-voltage solar panels up to charge higher-voltage lead-acid and lithium batteries up to 48V nominal

8A 12/24/36/48V Boost MPPT Controller

  • 99% Peak Efficiency
  • Continuous MPPT
  • Advanced electronic protections
  • IP40
  • 5 Year Warranty
  • Compatible with lithium and lead-acid batteries
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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, but traditional controllers are constantly off target during changing cloud conditions – exactly when power is scarce and is needed the most. Genasun controllers adapt to changing light conditions 20 times every second. They are always on target, capturing every bit of available sunshine. Simply put, other controllers can't keep up.

Computer-controlled, temperature-compensated 3-stage battery charging

Precise computer controlled charging ensures the optimal charge cycle for your battery. This increases the battery life, and maximizes battery capacity.

LED Indicator

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.

For Lead-Acid Batteries

GVB-8-Pb-12V GVB-8-Pb-24V GVB-8-Pb-36V GVB-8-Pb-48V GVB-8-Pb-CV
Rated Panel Input Current 8A*
Minimum Panel Voltage for Charging 5V
Minimum Battery Voltage for Operation 9.5V
Maximum Input Panel 60V
Recom. Max Panel Voc at STC 50V
Input Voltage Range 0-60V
Maximum Input Short Circuit Current 8A*
Maximum Input Current 15A
Tracking Efficiency 99+% typical
MPPT Tracking Speed 15hz
Charge Profile Multi-Stage with Temperature Compensation
Nominal Battery Voltage 12V 24V 36V 48V See specs for closest -Pb equivalent
Maximum Recommended Panel Vmp 13V 26V 41V 43V See specs for closest -Pb equivalent
Maximum Recommended Panel Power 105W 210W 325W 350W See specs for closest -Pb equivalent
Bulk Voltage (Pb models) 14.4V 28.8V 43.2V 57.6V See specs for closest -Pb equivalent
Absorption Voltage 14.2V 28.4 42.6 56.8 See specs for closest -Pb equivalent
Absorption Time 2 Hours See specs for closest -Pb equivalent
Float Voltage (Pb models) 13.8V 27.6V 41.4V 55.2V See specs for closest -Pb equivalent
Electrical Efficiency 95%-97% typical 96%-98% typical 96%-98% typical 96%-99% typical See specs for closest -Pb equivalent
Night Consumption 7mA 6mA 6mA 5mA See specs for closest -Pb equivalent
Battery Temperature Compensation -28mV/°C -56mV/°C -84mV/°C -112mV/°C See specs for closest -Pb equivalent
Maximum Full Power Ambient 70°C
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 (DiL) 6.5 oz., 185g
Dimensions 5.5 x 2.5 x 1.2", 14 x 6.5 x 3.1 cm
Warranty 5 years

For Lithium Batteries

GVB-8-Li-14.2V GVB-8-Li-28.4V GVB-8-Li-41.7V GVB-8-Li-56.8V GVB-8-Li-CV
Rated Panel (Input) Current 8A*
Minimum Panel Voltage for Charging 5V
Minimum Panel Voltage for Operation 9.5V
Absolute Maximum Panel Open-Circuit Voltage (Voc) 60V
Recommended Max Panel Voc at STC 50V
Input Voltage Range 0-60V
Maximum Input Short Circuit Current** 8A*
Maximum Input Current** 15A
Tracking Efficiency 99+% typical
MPPT Tracking Speed 15hz
Float/CV Voltage 14.2V 28.4V 41.7V 56.8V Custom
Nominal Battery Voltage 12V 4S LiFePo4 24V 8S LiFePo4 36V 4S Li-ion 48V 16S LiFePo4 Lithium
Maximum Recommended Panel Vmp 14V 28V 39V 43V See specs for closest CC/CV voltage
Maximum Recommended Panel Power 105W 210W 325W 350W See specs for closest CC/CV voltage
Electrical Efficiency 95%-97% typical 96%-98% typical 96%-98% typical 96%-99% typical See specs for closest CC/CV voltage
Night Consumption 7mA 6mA 6mA 5mA See specs for closest CC/CV voltage
Charge Profile CC/CV
Operating Temperature -40°C – 85°C
Maximum Full Power Ambient 70°C
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 6.5 oz., 185g
Dimensions 5.5 x 2.5 x 1.2", 14 x 6.5 x 3.1 cm
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.