With a rated input power of 50W, Genasun’s GV-4 solar charge controller is perfect for coupling a small panel to a battery to provide power for many applications, including powering lights, radios, and charging mobile devices in a sailboat or RV, maintaining a battery while a vehicle is in storage, or powering unattended devices where grid power is not available. Where panel size is limited, the GV-4’s advanced Maximum Power Point Tracking (MPPT) delivers 10-30% more power than a PWM controller, and the GV-4’s near-perfect tracking efficiency, excellent electrical efficiency over the whole power range, and tiny self-consumption allow it to easily outperform other MPPT controllers. The GV-4’s small size and light weight make mounting and installation a snap.
Widest Power Band
Efficiency matters. Many controllers are designed simply to not burn up at high power levels, with no attention to efficiency in low light. At Genasun, we understand that a watt-hour collected during bad weather is worth even more than a watt-hour collected on a sunny day. We tuned our power conversion circuitry to maintain high efficiency over the full range of power levels. Whereas other controllers may charge with efficiencies as low as 80% or worse in low light, the GV-4 maintains greater than 95% efficiency down to a few watts. At even lower levels, the GV-4 engages a special mode that boosts electrical efficiency to an astounding peak of 99.85%, consuming less than 0.2 milliamps and charging down to milliwatts of solar input. When other controllers have given up and are draining your battery, the GV-4 will still be charging.
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 operation 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 equal. Most use a “sweep and sleep” method that scans every 30-60 seconds. That’s okay for a clear day, but traditional controllers are constantly off target when used on vehicles or in changing cloud conditions – exactly when power is scarce and is needed the most. 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.
Custom Voltages Available
A custom charge voltage profile can be programmed at the factory to match the specs of your lead-acid battery (for lithium batteries, please see our GV-5 solar charge controller). To order a Custom Voltage controller, hit the “Choose Options” button next to the GV-4-Pb-CV SKU below, and select the voltages from the drop-down menu. Further options and bulk discounts are available by special order.