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-   -   multiple UPS's for lighting power supply? (https://www.dvinfo.net/forum/photon-management/80800-multiple-upss-lighting-power-supply.html)

Greg Quinn December 2nd, 2006 01:16 AM

multiple UPS's for lighting power supply?
Has anyone tried using computer uninterruptable power supplies (UPS) to power lighting in night shoots/remotes? Clearly they wouldn't last for hours, but it seems to me a workable solution for relatively brief remote shoots.

Bob Hart December 2nd, 2006 01:21 AM

The internal batteries may not be suitable for high current draw and deep-cycling.

Giroud Francois December 2nd, 2006 02:34 AM

ups deliver low power (about 300W) versus what needed for light (usually 500W and over) and at full load it is only few minutes.
and weight is really heavy, and expensive.
you better had to go with a small gazoline generator that can deliver easily 2000 W and for some , almost silently.
or you can go with 12V car lead accumulator and car lights. that is very cheap and efficient. you can probably run 2 or 300W per accumulator for several hours.

Boyd Ostroff December 2nd, 2006 07:15 AM

UPS'es almost all have an alarm that goes off as soon as the power drops. Older ones had a switch to disable this, but most of the new ones I've seen do not. They may also have a feature to shut them down automatically if running on battery power with no load attached. They really are intended to do something completely different and won't be a very good choice for what you want.

If you don't have too large of a load to power you might look at something like the Husky jump starter/inverter. Home Depot sells them for about $90. Just tried to link to their site but it doesn't work for some reason... go to homedepot.com and enter "hsk037hd" in the search box for more info.

It has an internal battery and provides both 12 volts DC and 120 volts AC through a 400 watt inverter. Of course it depends on how many lights you have and how long you want to run them. As others have said, battery power may not be sufficient for your needs.

Bob Grant December 2nd, 2006 07:52 AM

You can buy just inverters that run off 12 or 24V batteries. SLA batteries are pretty cheap, we use the Panasonics.
Running inkies off batteries is a bit of a waste of energy, fluros are better or LEDs. Generators are certainly a cheap source of lots of power. Can be noisy and need to be out in the open though.

Greg Quinn December 2nd, 2006 02:04 PM

Thanks for the input, all very good points. I suggested UPS's because folks do use them as off-site power supplies (after disconnecting the buzzers), but it sounds like an inverter of generator would be better.

Dean Sensui December 2nd, 2006 03:10 PM

Take a look at the Honda EU series of generators. They're enclosed and have low noise ratings around 59 dB. Panasonic in-room air conditioners, by comparison, have about the same noise ratings.

The 1000-watt generator is very compact and weighs 29 pounds. The 2000-watt generator weighs 46 pounds. They'll run at least a few hours on a tankful of gas at its rated load and several hours at partial load. And a gallon of gas goes a long way.

Check with your local rent-all company. They might have them available. Here in Honolulu the 1000-watt rents for about $35/day. The 2000 goes for $47/day.

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