this is for wery poor people who have no electricity on their farm. the only power they have is the 6x 90amp batteries and the inverter taking it from 12volt to 220volt. buying a charger is not an option. the charger is not regulated that i'm using. transformer, bridge rectifier,amp meter. transformer direct into rectifier, negative from rectifier to batteries negative, positive from rectifier to amp meter, amp meter to positive of batteries. this is the circuit. transformer can supply 30rms amps.