Genasun GVB-8 36V Voltage Boost MPPT Charge Controller for 41.7V Lithium Batteries

High-Efficiency Boost MPPT for 10S Li-Ion Systems

The Genasun GVB-8 36V Voltage Boost is a specialised MPPT solar charge controller engineered to charge 41.7V lithium battery packs (10S Li-Ion, also acceptable for 12S LiFePO4) from lower-voltage solar panels. Unlike conventional controllers that step down voltage, this boost MPPT elevates panel voltage to precisely match your battery, enabling the use of cost-effective, large-format panels typically rated below battery voltage. This approach reduces overall system cost while maintaining high efficiency.

Designed for mission-critical reliability, Genasun controllers operate in the world's most extreme environments—from Antarctic research stations to high-altitude solar aircraft. Each unit is manufactured in the USA and undergoes comprehensive electrical testing to ensure dependable performance when it matters most.

Advanced MPPT Technology: 15Hz Tracking Speed

Standard MPPT controllers often use a "sweep and sleep" algorithm, scanning the panel's power curve every 30–60 seconds. This is adequate for stationary panels under clear skies but falls short in dynamic conditions. The Genasun GVB-8 employs a high-speed MPPT algorithm that adjusts to changing light 15 times per second. This rapid tracking is critical for mobile applications—such as vehicles, marine vessels, and portable systems—where shading and orientation change constantly. The result is up to 99%+ tracking efficiency, capturing more energy from every ray of sunlight.

Optimised for 41.7V Lithium Batteries

This model is pre-configured with a CC-CV (Constant Current – Constant Voltage) charge profile tailored for 10S Li-Ion packs with a nominal voltage of 36V and a charge voltage of 41.7V. The controller delivers a precise, computer-controlled charge cycle that maximises battery capacity and extends service life. With no temperature compensation required for lithium chemistries, the profile remains stable across a wide operating range.

Key Features

• Boost topology charges 41.7V lithium batteries from panels with Vmp as low as 5V
• 8A rated input current supports panels up to approximately 325W (using typical ~155mm cells)
• 15Hz MPPT tracking adapts instantly to clouds, shadows, and vehicle movement
• Wide temperature tolerance from -40°C to 85°C for harsh environments
• Ultra-low self-consumption (5–7mA at night) preserves battery charge
• Fully potted, waterproof design withstands salt spray, humidity, and immersion
• Made in the USA with rigorous end-of-line testing

Built for Extreme Environments

The GVB-8 is encased in a compact, fully potted enclosure that protects against moisture, dust, and vibration. This waterproof MPPT construction makes it ideal for marine, coastal, and off-grid installations where reliability is non-negotiable. The controller operates silently—no cooling fans—and its low electromagnetic emissions ensure compatibility with sensitive communication equipment.

Simplified System Design

By decoupling panel voltage from battery voltage, the boost architecture allows a single large panel to replace multiple smaller panels wired in series. This not only lowers hardware costs but also simplifies mounting and wiring. The controller's 3/8"-16 (Approx. M10) stud terminals accept heavy-duty lugs up to 4/0 AWG (approx. 95mm²), ensuring secure, low-resistance connections for high-current applications.

Applications

• Charging 36V lithium battery banks in off-grid solar systems
• Marine and RV installations requiring waterproof, corrosion-resistant electronics
• Remote monitoring stations, telecommunications, and scientific equipment
• Portable power packs and mobile solar generators
• Any application where panel voltage is lower than battery voltage

Power Your Mission with Confidence

Equip your system with the Genasun GVB-8 36V Voltage Boost MPPT and experience the difference that precision engineering makes. Whether you're powering a remote sensor, a sailboat, or a critical backup system, this controller delivers the reliability and efficiency you need. Order today and harness every watt from your solar array.