UPS & Car Battery

prosenjit · 10-23-2006, 12:58 AM

I want to replace my UPS battery with a car battery (13 palates), details:
I want to connect a 12 volt 120 AH lead-acid car battery with my existing 500 VA UPS, for very fast switch over and long backup time during power failure, i also have an 400VA inverter which i want to use for charging up the car battery. Now question is will the UPS able to draw required power from 12v battery to run my PC.
I am trying to do so because my inverter is not so fast as the UPS in terms of switching over. And UPS back up time is 15 muintes only where inverter and this battery backup time more 3 hrs,

17" AOC monitor, 1.7 ghz p4 cpu

**twajetmech** · 10-23-2006, 01:19 AM

While I'm pretty sure what you suggest is possible, having a Automotive battery in your house and next to your computer does not sound very safe. Automotive batteries out-gas acidic fumes when discharging or being charged, not to mention the heat that can be involved during either cycle as well. Most UPS mfg's sell additional battery kits for extended hold-up time, some are external (but usually a sealed battery type) I would suggest you look into that or consider upgrading to a 900VA or better UPS model for additional hold-up time

10-23-2006, 12:58 AM	#1 (permalink)
prosenjit Registered User Join Date: Oct 2006 Posts: 1 OS: XP	UPS & Car Battery I want to replace my UPS battery with a car battery (13 palates), details: I want to connect a 12 volt 120 AH lead-acid car battery with my existing 500 VA UPS, for very fast switch over and long backup time during power failure, i also have an 400VA inverter which i want to use for charging up the car battery. Now question is will the UPS able to draw required power from 12v battery to run my PC. I am trying to do so because my inverter is not so fast as the UPS in terms of switching over. And UPS back up time is 15 muintes only where inverter and this battery backup time more 3 hrs, 17" AOC monitor, 1.7 ghz p4 cpu

10-23-2006, 01:19 AM	#2 (permalink)
twajetmech Moderator Join Date: Jul 2004 Location: LGA, NYC Posts: 2,368 OS: XP-Pro Sp2 & XP-Pro Sp2 Tablet Edition, Vista Ultimate My System	While I'm pretty sure what you suggest is possible, having a Automotive battery in your house and next to your computer does not sound very safe. Automotive batteries out-gas acidic fumes when discharging or being charged, not to mention the heat that can be involved during either cycle as well. Most UPS mfg's sell additional battery kits for extended hold-up time, some are external (but usually a sealed battery type) I would suggest you look into that or consider upgrading to a 900VA or better UPS model for additional hold-up time __________________ PSU Selection/Info // Bench test // Thermal Paste // Memory Selection // Bios Beep Codes // CPU-Z// Posting System Specs