J. Scott Kelley
January 21 2007, 12:47 AM
QUOTE(pic @ January 19 2007, 10:27 AM) [snapback]52427[/snapback]
Thanks everyone for your input! Keep em' coming!
Yeah I think I am looking for things like this possibly--I'm usually in places with no electricity outlet

A little off topic but....
One other trick up my sleeve is to use a DC-AC power inverter connected to my car and 150' of extension cable to get the AC power to the strobes at a remote site. I've measured the current draw of my DynaLite pack in order to determine how many Watts I need the inverter to provide.
In a nutshell, the inverter should be to supply a peak current of 8A (880 Watts @ 110VAC) at full power on a DynaLite 500XL (500WS). This peak lasts less than half a second as the capacitors charge to about 2/3 capacity, then it rapidly falls of to less than 1A ( 110W). A 450W inverter should be plenty powerful enough to to supply the very brief peak current. The current characteristics WILL be different for other packs, but I would expect it to be similar and fairly linear.
Selecting the best inverter for the job is a little tricky since they're designed for relatively constant power output. With some models, you might be able to get by with 25% of the peak (i.e. 220W with my pack), but I think a good general rule of thumb would be to use one that's at least 50% peak. It's always a good idea to consult the inverter specifications, which usually list the peak, but very rarely will they list for how long the peak current can be pulled (do they mean 10 seconds or 1/4 second?).
Do NOT run modeling lights off an inverter - They're normally rated at 250 or 500W (mine are the latter), and I measured the current draw for two modeling lights to be 9A (990W) - Just shy of 500W each, which is exactly what I expected.
Also, keep the car running so that the alternator is generating electricity and you're not sucking your battery dry (also bad for your battery's health).
The longer the extension cord, the more resistance and thus the higher the current draw. My measurements were taken with a 100' cord because that's primarily what I'll be using. You probably want to add at least 50W per 100' to be safe.
*** LEGAL ***
THIS IS NOT ADVICE. DO NOT TRY THIS. CONSULT A PROFESSIONAL ELECTRICIAN. I AM NOT RESPONSIBILE IF YOU BLOW UP YOUR CAR OR BURN YOUR HOUSE DOWN. I AM HAPPY TO SHARE MY PERSONAL EXPERIENCES BUT I PROVIDE NO WARRANTY, EXPRESS OR IMPLIED, FOR ANY PARTICULAR FITNESS OF USE OR REASONABLE SAFETY.