deep cycle battery backup

**badkuk** · July 24th, 2014 03:10 PM

Hi All,

i recently saw a page/blog with pretty basic setup -- the guy basically had a deep cycle battery hooked up to an inverter/trickle charger, with an inverter on standby in case of power outages. If you don't want to fool around with solar panels this seems a practical setup.

What do you guys think? Any off-the-shelf charger/inverter should work right, assuming the volts/amps/wattage line up?

tia

**sirkosero** · July 24th, 2014 03:23 PM

we had the same setup before. inverter is hooked the car battery and car is on idle. power was supplied to an electric fan and a black and white TV and some lights.

we used it in the 90s until nasira yung inverter. now im looking for a 12vdc to 220vac inverter

Sent from my Thrill 430x using Tapatalk 2

**shibby75** · July 24th, 2014 03:41 PM

You can use an old ups with a dead bat, change the battery to a much larger capacity and connect it to your lights. Every brownout your lights will automatically change to battery mode and go back to standby mode when the grid returns.

Just dont expect the ups to charge the batteries overnight. Some ups on charges the batteries at 1 or 2 amp

**dr. d** · July 24th, 2014 08:01 PM

..tried it before. It works. The difficult part was to isolate the appliances that will be powered by the battery. Otherwise, your contraption will power the entire neighborhood and run out of power very fast, if it doesn't blow a fuse first..

**badkuk** · July 25th, 2014 10:40 AM

Originally Posted by shibby75

You can use an old ups with a dead bat, change the battery to a much larger capacity and connect it to your lights. Every brownout your lights will automatically change to battery mode and go back to standby mode when the grid returns.

Just dont expect the ups to charge the batteries overnight. Some ups on charges the batteries at 1 or 2 amp

i read in some forums that hooking up deep cycle batteries to UPSes isn't recommended, that the UPS electronics/electricals "aren't designed" to handle deep cycle batteries...

**shibby75** · July 25th, 2014 11:18 AM

Yes, its not designed to handle flooded batteries that has a float voltage of 14.6. A sealed type battery has a float voltage of 14.4v.

Lead acid Battery fumes tend be more corrosive and explosive if charged in an enclosed space.