3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
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pianotuna wrote:Good question, Don. I assume it depends on the size of the surge. I didn't think to simply tie a DMM to the battery while testing it. It was a customer's genny so I no longer have access to it.
Hi So,
Does the extra boost occur any time the load is suddenly and dramatically increased--as it is when an air conditioner is turned on?
Easy to do...
1. First, tie a DMM (w/analogue scale) to the battery and note the stable, unloaded voltage (genny running, warmed up, no loads)
2. Then start loading the unit with various known loads (with DMM still attached to the battery). I'd start with a 1500W space heater - turned on first, then plug it in the genny and see if battery voltage dips noticeably.
Assuming a max 500W surge boost (@ 120Vac), that's an estimated 38 amp momentary draw on the battery, @ 13Vdc. You'll likely see a 2-4v (maybe more) momentary drop. It could also be a variable boost, tapping the battery with only what is necessary to counter the surge. If that's the case, then you'll see a proportional but momentary decrease in battery voltage as the load is suddenly increased on the genny's 120Vac side.
