I use this to run the 8amp 12vdc water pump in the cab. For these purposes it works well and without any problems. I've been using it daily for a few weeks. Update: I've been using this all day, every day for over a year and it's still working. The fan was a bit noisy so I panicked and bought another just in case. I don't need it yet. We have a drying cabin with a water tank and water pump. I pour water from our truck's barrels into the tank. We use 100 to 200 gallons a week. I would advise people who need a power adapter to buy one.