... water heater timer time switch for solar water pump, water heater Power supply: 110V ac or 240V ac 7 day programmable TM-615H 30amp Electric water heater ... timer switch is within rechargeable battery, in 1.2V/40Ma, high-accuracy CMOS chip, strongly anti-jamming, easy to use. Preprogram ... or 240VAC COMPACT SIZE, DIN RAIL INSTALLATION: 30 Amp hot water heater Timer