20W 12V Solar Trickle Charger w/ MPPT, Waterproof Maintainer for Car RV Boat
As we all know, batteries naturally drain power and if allowed to go flat, may never regain their full power. Made of high efficiency, 30% more than competitors, works great in sunlight. The surface was covered by tempered solar glass, protecting the solar cells from snow, hail, dust, etc.