SUNAPEX Solar Battery Trickle Charger Maintainer 30W 12V Waterproof Solar Panel Trickle Charger for Car Boat RV Truck Motorcycle Marine Tractor Battery

This solar panel is slow charging my truck battery and is able to keep it maintained. I am running 2 Garmin dash cams (front and rear) while the truck is parked. I leave these cameras running 24/7 for the security of my truck when parked outdoors. The cameras will save the video if there is any disturbance. The two cameras when standby and simply monitoring pull about 1/2 Amp from the battery. Over a number of days when the truck is parked the battery can start to run down because of the dash cams.This panel in full sun light is putting out about 2.4 Amps. On a bright cloudy day it is putting out anywhere from about 0.8 Amps to about 1.8 Amps depending on the density of the clouds. In most cases during the day this panel is maintaining the cameras to prevent the battery from being run down. When it is putting out more than about 1.5 Amps it is trickle charging the battery. The vehicle phantom current from its own electronics is about 0.06 Amps average. The user manual indicates after about 2 weeks of vehicle non use the battery may be run down. When parked for more than a few days the battery should have a charger connected to it.--In most of the Japanese vehicles the 12 Volt cigar lighter socket turns off with the key. With most of the US vehicles the 12 Volt cigar lighter socket remains live. In some of the Japanese SUVs and trucks they offer both a switched 12 Volt cigar lighter socket, and one that is always on.In my truck I have an always on 12 Volt cigar lighter socket. Also, you can have your dealer wire in a fuse protected auxiliary 12 Volt socket for you. They can also wire in a pair of 12 Volt wires and you can custom connect them to the panel or operate any other type of 12 Volt devices.--I would recommend this solar panel for battery maintenance. I found with the proper adapters it would be possible to put a number of these panels in parallel to have higher current.I have a friend with a large mobile trailer home and he wired up 20 panels in parallel to charge a bank of 12 Volt Lithium ION batteries. He is able to run his lighting, a computer, an RV fridge, and an HD TV with a sound system. All is using 12 Volts. His cooking and grilling is using propane.

I have about 10 of them charging deep cycle batteries that power target throwing machines. They work well and are the least expensive available.

Needs more sun than the one it replaced. Sometimes I only get 8 volts which will not charge a battery. Tractor did stary after 2 or 3 months so expect it does change sometimes.

Fonctionne très bien pour recharger des batteries à bateaux qui ne sont pas déchargés complètement

Good value for the money. Accessories cover all applications of possible use....