A:
DO YOU WANT TO MAKE THE LONGEST LASTING BATTERY BACKUP??? BUY YOURSELF A GOLFCART STYLE DEEP CYCLE BATTERY, AN INEXPENSIVE BATTERY CHARGER, A MODERATELY PRICED POWER INVERTER (150.00 OR LESS) AND A DOUBLE POLE, DOUBLE THROW 12 VOLT RELAY, WITH GOOD
CURRENT FLOW TERMINALS. THEN IF THERE IS A POWER FAILURE, 12 HOURS LATER, YOUR SYSTEM STILL WORKS.