KOBUTA 5 I have an old (17 years) Honda Stepwagon. I often go overseas for long periods. Last year the battery was destroyed by leaving the vehicle in the parking place.This year I left the vehicle for about 5 months in the summer. Using this solar panel and charge controller the battery was fine and the van started immediately.The instructions for the charge controller were in Chinese and English. OK for me because I can understand English.The charger worked OK, but does not look very strong or well made, so I don't know how long it will last. It is not waterproof, but was fine under the car bonnet while the vehicle is parked.I simply left the solar panel on the dashboard, modified the cable and ran it through the door seal and into the engine compartment. I put the controller on top of the engine.The power output of the panel was enough to maintain the battery in the summer. Maybe it will be OK in the winter.Very good value at the price.