Review on 🔋 POWISER 7.5W Solar Car Battery Trickle Charger & Maintainer - 12V Solar Panel Power Charger Kit for Automotive, Motorcycle, Boat, Marine, RV, Trailer, Powersports, Snowmobile, and more by Eric Chapman

Nice little block that does the job. I bought it to keep the batteries charged in my 5 wheel diesel truck and van. The suction cups work well and in a truck I just plug them into the cigarette lighter socket and if the truck sits for a couple of weeks the battery stays good to go. For the RV it has the standard plugs used on most solar panels and 12v electrical connections so I can easily unplug the cigarette lighter port and plug directly into the solar plug on the side of my solar enabled van. It works great in the same way. I have two AGM batteries and this keeps them charged between campervan trips or when I need to get into the campervan to pack or do other chores I can turn on the lights or radio without running out of batteries or when I they drain a little, which helps when refilling without having to connect the RV to shore/house power supply.