Genasun GVB-8-WP Waterproof Boost MPPT Solar Charge Controller – 12V LiFePO₄

8A waterproof voltage-boosting MPPT solar charge controller for 12V LiFePO₄ batteries and low-voltage solar panels.

The Genasun GVB-8-Li-14.2V-WP combines voltage-boosting MPPT technology with an IP68 waterproof enclosure, making it an excellent solution for marine and other outdoor installations where the solar controller may be exposed to moisture.

Designed for 12V (4S) LiFePO₄ battery systems, the GVB-8-WP can accept solar-panel input as low as 5V for charging and boost the panel voltage to the 14.2V required by the LiFePO₄ charging profile.

It is an ideal companion for specialty low-voltage solar panels such as the CMP 36W Walkable Semi-Rigid Solar Panel, which has a Vmp of only 6.49V.

Made in the USA | IP68 Waterproof | 8A Boost MPPT | 12V LiFePO₄ | 5-Year Warranty

Why Choose the Waterproof GVB-8-WP?

Marine and outdoor installations can expose electrical equipment to rain, spray, condensation, splashing water, and other harsh conditions.

The GVB-8-WP uses a proprietary potting compound to protect its internal electronics and carries an IP68 waterproof rating.
That makes it particularly well suited to applications where the controller cannot be fully protected inside a dry electrical compartment.

Ideal for:

• Marine and boat installations
• Exposed solar installations
• Vans and RVs
• Outdoor equipment
• E-bikes and small electric vehicles
• Other applications where the controller may be exposed to moisture

Key Features

• 8A voltage-boosting MPPT solar charge controller
• Designed for 12V (4S) LiFePO₄ batteries
• 14.2V CC/CV charging profile
• Boosts low solar-panel voltage to battery charging voltage
• Panel input as low as 5V for charging
• IP68 waterproof construction
• 12 AWG tinned flying leads
• 99% peak efficiency
• 95–97% typical electrical efficiency
• High-speed 15Hz MPPT tracking
• Advanced electronic protections
• Low 7mA standby consumption
• No fans or mechanical relays
• Made in the USA
• 5-year warranty
• CE, FCC and RoHS compliant

Boost Low Panel Voltage to Charge a 12V LiFePO₄ Battery

Most conventional solar charge controllers reduce a higher panel voltage down to the battery charging voltage.
The GVB-8-WP works in the opposite direction.

Its boost (step-up) MPPT technology increases the voltage from a low-voltage solar panel while continuously tracking the panel's maximum power point.

This allows a specialty low-voltage panel to be used in a 12V LiFePO₄ solar charging system without requiring the panel voltage itself to reach battery charging voltage.

Waterproof Protection for Marine Applications

The GVB-8-WP is designed for applications where moisture exposure is a concern. Its electronics are protected by a proprietary potting compound, providing an IP68 waterproof rating.

For marine installations, this provides an additional level of protection compared with the standard GVB-8, which has an IP40 enclosure.

Standard GVB-8: IP40
GVB-8-WP: IP68 Waterproof

If the controller will be installed in a dry, protected electrical compartment, the standard GVB-8 may be a more compact and lower-cost option.

[View the Standard Genasun GVB-8 →]

New 12 AWG Flying Leads

The latest GVB-8-WP version includes 12 AWG flying leads made from tinned wire, providing a robust connection for solar and battery wiring.
The wires are supplied pre-stripped for installation.

High-Speed MPPT Tracking

Solar conditions can change rapidly, particularly on boats and mobile installations where panels can experience changing shadows from rigging, antennas, structures, trees, or other objects.

The GVB-8-WP tracks the solar panel's maximum power point at 15Hz, allowing it to respond rapidly to changing light conditions.
This helps the controller continuously seek the panel's available maximum power as sunlight changes.

Efficient Across a Wide Power Range

The GVB-8-WP is designed to maintain high conversion efficiency across a broad range of operating conditions.
Genasun specifies 95–97% typical electrical efficiency for the 12V LiFePO₄ version.
For the 12V models, efficiency remains approximately 94% even at 10% of rated input, helping the controller continue charging when available solar power is low.

Lithium-Specific Charging Profile

The GVB-8-Li-14.2V-WP is configured specifically for 12V (4S) LiFePO₄ batteries.

Charging Specifications

• Battery chemistry: LiFePO₄
• Battery configuration: 12V (4S)
• Charge profile: CC/CV
• CV voltage: 14.2V
• Battery temperature compensation: Disabled

This product is intended for 12V LiFePO₄ systems.

Built for Demanding Environments

Genasun controllers are used in demanding environments, including marine applications and other remote installations.
The GVB-8-WP has no cooling fan or mechanical relay, eliminating moving components that can wear out or become clogged.
Its waterproof construction and robust electrical design make it well suited for installations where reliability and environmental protection are important.

Partial-Shade Performance

The Genasun GVB-8-WP uses high-speed MPPT tracking to continuously seek the solar panel's maximum power point.
This is particularly useful in marine applications where partial shade can come from:

• Sailboat rigging
• Masts and antennas
• Bimini hardware
• Booms
• Nearby structures
• Other obstructions

Genasun reports that its advanced MPPT technology can provide significantly more available power than conventional controllers under certain partial-shading conditions.
Actual performance will vary depending on the panel, shading pattern, installation, and available sunlight.

LED Status Indicator

The built-in LED provides a quick visual indication of controller operation.
It helps confirm proper installation and indicates when the controller is charging the battery from solar power and when the battery has reached full charge.

No Fans. No Relays.

The GVB-8-WP uses solid-state electronic design without cooling fans or mechanical relays.
With no moving parts, there are fewer mechanical components subject to wear during normal operation.

Technical Specifications

Panel Input Note
Genasun's current recommendation allows the GVB-8 to be used with solar panels having Imp up to 9A, provided all other panel input limits are also respected, including maximum Isc, input voltage, and recommended panel power.

Installation & Compatibility

The GVB-8-Li-14.2V-WP is specifically configured for 12V (4S) LiFePO₄ battery systems.
Before installation, verify that:

• The battery is a compatible 12V LiFePO₄ system.
• The solar panel's voltage and current are within the controller's input specifications.
• The total panel configuration does not exceed the controller's voltage, current, or power limits.
• Proper wire sizing, fusing, and installation practices are followed.
• Connections are properly protected and installed according to applicable electrical requirements.

Do not use this model for lead-acid, 24V, 36V, 48V, or other battery configurations.

Frequently Asked Questions

❔ Why does the CMP 36W solar panel need a boost MPPT controller?
The CMP 36W panel has a Vmp of only 6.49V, while a 12V LiFePO₄ battery requires approximately 14V charging voltage.
A conventional buck-type MPPT controller cannot increase the panel voltage. The GVB-8-WP uses boost MPPT technology to increase the panel voltage to the required charging voltage.

❔ Is the GVB-8-WP compatible with a 12V LiFePO₄ battery?
Yes. The GVB-8-Li-14.2V-WP is specifically configured for 12V (4S) LiFePO₄ batteries with a 14.2V CC/CV charging profile.

❔ What is the difference between the GVB-8 and GVB-8-WP?
The main difference is environmental protection and physical construction.
The standard GVB-8 is IP40, while the GVB-8-WP is IP68 waterproof and uses a potted enclosure with 12 AWG tinned flying leads.
Choose the WP version when the controller may be exposed to moisture or the elements.

❔ Is IP68 the same as waterproof?
IP68 indicates a high level of protection against dust and water ingress under specified test conditions. Installation should still follow the manufacturer's requirements and applicable environmental limitations.

❔ What is the minimum solar-panel voltage?
The GVB-8-WP can charge from panel input as low as 5V, provided the other operating conditions and input limits are satisfied.

Made in the USA

Genasun controllers are made in the USA and electrically tested before shipment.
The GVB-8-WP combines boost MPPT technology, waterproof construction, and a lithium-specific charging profile for demanding marine and outdoor solar applications.

Standard or Waterproof?

Choose the Genasun GVB-8-WP when your solar controller may be exposed to rain, spray, splashing water, condensation, or other moisture.

Choose the standard GVB-8 when the controller will be installed in a protected, dry electrical compartment.

Both versions provide the same core 8A boost MPPT function for 12V LiFePO₄ systems.

Recommended for the CMP 36W Low-Voltage Solar Panel

The Genasun GVB-8-Li-14.2V-WP is designed to pair with low-voltage solar panels such as the CMP 36W Walkable Semi-Rigid Solar Panel when charging a 12V LiFePO₄ battery.

Low-voltage panel. Boost MPPT. Waterproof protection. 12V LiFePO₄ charging.

[Shop the CMP 36W Walkable Semi-Rigid Solar Panel →]