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Thread: Can I put an extra battery in my Chevy?

  1. #11
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    Depends what type of UPS you have... I know that most APC UPS's that I've seen are solid and can run for hours without a problem. If you're really worried about heat dissipation, add in a second fan somewhere.

    My 400W inverter has one small fan and that's it. My 700W UPS has a honking fan and a build in temperature sensor that will shut down if it gets too hot.

    And they'll provide you with cleaner power than an inverter and with a lower dropout voltage too. Not to mention that there is a built in computer interface that will allow you to get access to the car's battery voltage, estimated runtime remaining, current load, and some other neat features.
    IN DEVELOPMENT -- '96 Mustang, lilliput with PII/450 laptop, custom DC-DC power supply, 60GB; Garmin GPS; 802.11g; compact keyboard, small graphical LCDs, OBDII.

  2. #12
    Maximum Bitrate eugenen's Avatar
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    May 2002
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    I noticed he wasn't from the US so I don't know if tripplite and APC are over there or not (I think they are both worldwide companies though). A lot of the lower cost brands don't run well for long times.We also had problems with old APC's in the 911 centers being too sensitive, when the center was running from backup power they would never switch off battery to line power because the generators, even the expensive clean power ones, were still too noisy. I would think car power would be close to as noisy, maybe not though.

  3. #13
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    Right, which is exactly why you might need to wire it directly into the car as opposed to plugging the UPS into an inverter. This is more efficient and then you wouldn't have to worry about that problem.

    However I do believe that other people are using inverters with UPS's plugged into them, but since I don't, I don't know how they would react.

    APC is a worldwide company and I know that they exist and are used in Europe. I'm not sure about Tripplite, but after dealing with APC's customer service, which might just be the best customer service in the world, I don't see a need to try anything other than APC.
    IN DEVELOPMENT -- '96 Mustang, lilliput with PII/450 laptop, custom DC-DC power supply, 60GB; Garmin GPS; 802.11g; compact keyboard, small graphical LCDs, OBDII.

  4. #14
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    Nov 2008
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    Virginia
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    What I am reading here is that you want a separate battery to provide power to the computer when the engine is not running.

    I can offer a suggestion that has been utilized by many RV'ers... a pair of Trojan 6V 225 AH golf cart batteries wired in series. This increases the voltage to 12 and gives you 112.5 AH at 50% discharge for the pair. These batteries are about $300 for the pair, but are much better than a 40 AH Optima that costs $175.

  5. #15
    Constant Bitrate
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    Apr 2003
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    Norway
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    Eh..thanks, but it's a bit late. This was in 2003, and I have been running a dual battery setup in that Chevy for more than five years now! And golf cart batteries aren't available in Norway anyway, as far as I know.
    Tor - The MediaSUV

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