Using UPS as portable power source for location lighting

Started Oct 12, 2011 | Discussions thread
Robert J. Gonzalez
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Re: Using UPS as portable power source for location lighting
In reply to Michael Fryd, Oct 13, 2011

You're not thinking big enough. Use a golfcart or wheelchair battery.

12 ah is nothing.

Michael Fryd wrote:

There are a few issues to watch out for.

400W doesn't sound like much for hot lights. I assume you intend to use studio strobes. Most studio strobes have a peak power draw of over 1400 VA. You need to make sure your UPS won't shut down on overload (particularly if you use more than one strobe).

Remember that the AH rating of most sealed lead-acid batteries are based on a low current draw. At high current draws, the batteries have a lower rating. A battery that will provide 100W for an hour, will likely provide 1000W for much less than 6 minutes.

Use thick wires. For 1,000W you need to pull over 80A from your 12V batteries.

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