Sadly I missed out on that 600 baht/200ah battery deal and have been watching the market for the last six months. I am using this system as a UPS for a couple of TV’s, fan, and a few lights and normally draw less than 175 watts unless the MIL has her old CRT TV running. I do agree that it is a waste of money to purchase these used batteries for a solar setup that has to cycle every day.