400W solar panel kits ideal for 12v battery charging, designed for RVs, cabins, homes, boats, caravan s, back-up and remote power use.

Multiple applications: Solar kit with 12V battery off-grid, perfect solution for power supply. Such as street lights, indicators, door openers, etc.. Also can meet the RV, boat, cabin, trailer, farm, home, etc. lack of power, power failure problems.

Robust and durable：Corrosion-resistant aluminum frame for extended outdoor use, allowing the panels to last for decades as well as withstand high winds (2400Pa) and snow loads (5400Pa) .

With the 20A charge controller with PWM function, it can prevent the battery from over charge, over voltage, discharge and short circuit, reversed polarity protection, battery is fully protected. You can expand your system up to a maximum of 260W 12V system or 520W 24V system