Genasun GV-4 - 50W 4A | Solar charge controller with MPPT



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Small, critically efficient, and cost-effective, the GV-4 gets more from every panel.

4A 12V MPPT Controller

  • 99.85% Peak Efficiency
  • High-speed MPPT
  • Advanced electronic protection
  • Tiny self-consumption (0.12mA)
  • IP40
  • 5 Year Warranty
  • Compatible with lithium and lead-acid batteries
Maximum Recommended Panel Power 50W
Rated Battery (Output) Current 4A
Nominal Battery Voltage 12V
Max Input Voltage 27V
Recom. Max Panel Voc at STC 22V
Minimum Battery Voltage for Operation 7.2V
Input Voltage Range 0-27V
Maximum Input Short Circuit Current 4A
Maximum Input Current** 7A
Charge Profile Multi-Stage with Temperature Compensation
Absorption Voltage 14.2V
Absorption Time 2 Hours
Float Voltage 13.8V
Charging Output Voltage Range 7.2-18V
Charging Output Voltage Range 7.2-18V
Battery Temperature Compensation -28mV/°C
Operating Temperature -40°C - 85°C
Maximum Full Power Ambient 50°
Electrical Efficiency 96%-99.85% typical
Tracking Efficiency 99% typical
MPPT Tracking Speed 15Hz
Operating Consumption 0.125mA(125uA)
Night Consumption 0.09mA (90uA)
Environmental Protection IP40 (Terminals Nickel Plated)
Connection 4-position terminal block for 12-30AWG wire
Weight 2.8 oz., 80g
Dimensions 4.3 x 2.2 x 0.9", 11 x 5.6 x 2.5 cm
Warranty 5 years

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.

Get the Ceramic Edge. Electrolytic-Free with 10 Year Warranty

Genasun’s Ceramic controllers set a new benchmark for reliability. Traditional controllers have components filled with fluid electrolytes that boil off over time, causing system failure. Genasun Solid Ceramic controllers have no fluid. They don’t wear out in the heat. Backed by an industry leading 10 year warranty, these controllers take reliability to a new level.

High-Speed MPPT: Always on Target

Not all Maximum Power Point Tracking controllers were created equal. 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.

Advanced Lithium Charging Algorithms

Our Lithium charging algorithms draw from nine years of experience building Lithium battery packs for harsh environments. We've worked with every chemistry, and have tailored charge profiles to help you get more capacity and cycle life from your battery pack.

Custom Voltages Available

Genasun stocks the GV-4 in a variety of charge profiles for the most common Lithium chemistries and cell configurations. Custom voltages can be programmed at the factory to match the Float Voltage (CV voltage) of your battery. To order a Custom Voltage controller, hit the "Customize" button in the e-commerce page and select the custom voltage from the drop down. For further information email techsupport @


Surviving the Storm with Low Power Burn

Every controller uses power. While a typical PWM controller burns 9mA, the Genasun GV-4 burns a scant 0.125mA. That slow burn is perfect for waiting out a snow-covered panel, or a few bad weeks of clouds.

Partial Shade – In-City Applications

Genasun controllers shine in partial shade. The 50% power increase from Genasun’s advanced MPPT is often enough to prevent system downtime from partial shade. From street signs and tree branches, to coffee cups and stickers placed on panels by pedestrians, Genasun MPPT keeps partially shaded solar panels generating more power than any other controller.

Steady Power Source

Life is unpredictable. PWM controllers amplify that unpredictability. A small amount of shade can drop PWM power output to 2/3's of what a Genasun MPPT controller can draw from the same panel. By constantly adapting to changing light conditions, Genasun’s advanced MPPT controllers provide a steadier source of power, keeping your system running in uncertain weather.

Radio Silence

Most MPPT solar charge controllers broadcast Radio Frequency noise from the DC/DC conversion circuit. Unfiltered inputs and outputs waste energy and interfere with nearby or attached electronics. Genasun worked to eliminated RF emissions from our line of charge controllers. During third-party testing for FCC compliance, the test engineer asked us, “Is it on?”. Mission accomplished.

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.

Fault Tolerance

Electronic reverse-battery protection.

Electronic reverse-panel protection

    Collections: Solar Controllers

    Category: 0-50 Watts, Genasun

    Type: Solar Controller

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