Genasun 8A MPPT 36V Voltage Boost (41.7V Lithium) - Waterproof Solar Charge Controller
Genasun 8A MPPT 36V Voltage Boost (41.7V Lithium) - Waterproof Solar Charge Controller
True MPPT Boost for 36V Li-Ion | IP68 Waterproof | 325W Max Panel
Highlights:Wiring Guide: Clear terminal guide for Battery and Panel connections,LED Status Indicator: Multi-color LED indicates standby, charging, or full battery status,Mounting Flanges: Integrated mounting holes for secure installation,Made in USA: Manufactured in the USA quality badge,Voltage Spec: Label indicating 41.7V Lithium boost charging capability.
Rugged, fully encapsulated waterproof potting ensures the controller withstands harsh environments while the side flanges allow for easy mounting.
Simple wiring configuration showing connections from the solar panel to the controller and the 10S Li-Ion battery with an in-line fuse.
Key features: Fast, unrivaled MPPT tracking 15 times/second, Voltage boost technology ideal for e-vehicles, IP68 Waterproof rating, Extreme temperature performance from -40°C to 85°C, Low self-consumption of 5-7 mA, Made in the USA.
Comparison showing the GVB-8-WP's superior low-voltage startup, waterproofing, and efficiency compared to standard boost controllers. 
DESCRIPTION
Genasun GVB-8-WP: Advanced MPPT Boost Charge Controller for 36V Lithium Systems
Engineered for Demanding Off-Grid, Marine, and Industrial Applications
The Genasun GVB-8-WP 8A MPPT boost charge controller is purpose-built to solve a critical challenge in solar system design: charging higher-voltage batteries from lower-voltage solar panels. This waterproof MPPT controller enables a 12V or 24V nominal solar array to efficiently charge a 36V lithium battery bank, making it an essential component for electric vehicles, golf carts, marine systems, and remote off-grid installations where panel voltage is limited by space or configuration.
Unlike conventional boost converters that rely on simple PWM or "nominal MPPT" algorithms, the GVB-8-WP employs true Maximum Power Point Tracking at 15 Hz, ensuring your panels operate at their optimal power point even under rapidly changing light conditions. This results in up to 30% more energy harvest compared to non-MPPT boost controllers, particularly during cloudy or low-light periods.
True MPPT vs. Nominal MPPT: Why It Matters
Many competing boost controllers claim MPPT functionality but actually use a fixed voltage multiplication factor, ignoring real-time variations in panel performance. Genasun's ultra-fast 15 Hz tracking continuously adjusts the input voltage to extract maximum available power, delivering 99% peak tracking efficiency. This is especially valuable in mobile applications where shading, tilt angle, and temperature fluctuations constantly alter the panel's maximum power point.
Built for Harsh Environments
The GVB-8-WP is fully encapsulated in a proprietary potting compound, achieving an IP68 waterproof rating that protects against dust, moisture, and vibration. This makes it suitable for marine solar charging, vehicle-mounted systems, and outdoor industrial equipment where exposure to the elements is unavoidable. The controller operates reliably from -40°C to 85°C, with full power output up to 70°C ambient, ensuring consistent performance in extreme climates.
- True MPPT boost topology charges 36V lithium batteries from 12V or 24V panels
- 99% peak tracking efficiency maximises energy yield in variable conditions
- IP68 waterproof and fully potted for marine, vehicle, and outdoor use
- Multi-stage charging with temperature compensation protects and extends lithium battery life
- Ultra-low self-consumption (6 mA night draw) preserves battery charge during darkness
- Integrated in-line fuse and flying leads simplify installation and enhance safety
- Made in the USA with a 5-year warranty for long-term reliability
Optimised for 36V Lithium Battery Banks
This model is specifically configured for 36V lithium-ion batteries with a bulk charge voltage of 43.2V and float at 41.4V. The multi-stage charging algorithm includes temperature compensation to prevent overcharging in hot conditions and undercharging in cold, a critical feature for lithium chemistries that are sensitive to voltage extremes. With a maximum recommended panel power of 325W and panel Vmp up to 41V, it pairs perfectly with common 60-cell or 72-cell residential panels repurposed for mobile or off-grid use.
Applications Where the GVB-8-WP Excels
This controller is ideal for scenarios where a higher battery voltage is required but panel voltage is constrained:
- Electric golf carts and utility vehicles using 36V battery packs charged from a single 12V or 24V panel on the roof
- Marine solar systems where a 36V trolling motor battery needs charging from a compact 12V panel
- Remote monitoring stations with 36V equipment powered by a small solar array
- Off-grid lighting and signage where 36V LED systems require reliable daytime charging
- Industrial IoT and telemetry installations needing a robust, maintenance-free charge solution
Installation and Wiring
The controller features pre-stripped 16 AWG tinned flying leads for straightforward connection to your solar panel and battery. An in-line fuse is included to protect against overcurrent conditions. The compact dimensions (140 x 81 x 55 mm) and integrated mounting flanges allow secure installation in tight spaces. A multi-colour LED provides clear status indication: standby, charging, or battery full.
Why Choose Genasun?
Genasun controllers are engineered and manufactured in the USA to the highest standards, with a focus on efficiency, durability, and real-world performance. The GVB-8-WP's combination of true MPPT boost technology, IP68 waterproofing, and wide temperature tolerance makes it a superior choice over generic boost converters that often lack proper MPPT, environmental protection, or lithium-specific charging profiles.
Equip your 36V lithium system with a charge controller that delivers maximum power, reliability, and longevity. Order the Genasun GVB-8-WP today and experience the difference that precision MPPT boost technology makes in your off-grid or mobile solar setup.
SPECIFICATIONS
Product Specifications
| GVB-8-WP, All Models | |
|---|---|
| Rated Panel (Input) Current | 8A |
| Minimum Panel Voltage for Charging | 5V |
| Minimum Battery Voltage for Operation | 9.5V |
| Maximum Input Panel | 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 |
| Operating Temperature | -40°C to 85°C |
| Maximum Full Power Ambient | 70°C |
| Environmental Protection | IP68, Waterproof |
| Connection | Flying Leads, 16 AWG tinned wire, pre-stripped |
| Weight | 10.3oz (290g) |
| Dimensions | 5.5 x 3.2 x 2.7 in (14 x 8.1 x 5.5 cm) |
| Warranty | 5 years |
| Specification | 12V | 24V | 36V | 48V |
|---|---|---|---|---|
| Charge Profile | Multi-Stage with Temperature Compensation | |||
| Nominal Battery Voltage | 12V | 24V | 36V | 48V |
| Max Recommended Panel Vmp | 13V | 26V | 41V | 43V |
| Max Recommended Panel Power | 105W | 210W | 325W | 350W |
| Bulk Voltage | 14.4V | 28.8V | 43.2V | 57.6V |
| Absorption Voltage | 14.2V | 28.4V | 42.6V | 56.8V |
| Absorption Time | 2 Hours | |||
| Float Voltage | 13.8V | 27.6V | 41.4V | 55.2V |
| Battery Temp Compensation | -28mV/°C | -56mV/°C | -84mV/°C | -112mV/°C |
| Electrical Efficiency | 95-97% | 96-98% | 96-98% | 96-99% |
| Night Consumption | 7mA | 6mA | 6mA | 5mA |




