SOLPERK Solar Panel Kit 20W 12V, Solar Battery Trickle Charger Maintainer + Upgrade Waterproof Controller + Adjustable…

Amazon.com Price: $56.99 (as of 12/06/2021 14:50 PST- Details)

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☞【Outstanding Quality】20W solar panel adopts well-built monocrystalline cells with high conversion efficiency up to 24%. Using Tempered glass, weatherproof film and plus aluminum frame for excellent extended outdoor use, which can withstand storms for more than 10 years.
☞【Waterproof controller】 Improved waterproof case eliminates the problem of controller water failure. Advanced PWM algorithm can fully protect the battery: under/over voltage, output overload, short circuit and anti-back connect protections. It can greatly enhances 20% charging efficiency with no additional self power consumption.