Re: AC battery , would it be better than DC battery with AC converter
No doubt someone is selling room temperature superconductors on Ebay but I wouldn't recommend buying them :smile:
Batteries work by chemically splitting the molecules into positive and negative charges, one at each terminal. AC batteries do not exist. Also, it is improbable that 220V DC batteries are available (you actually need more to get peak sine voltages). An inverter taking low voltage DC and converting it to high voltage AC is your best option.
Brian.