A 12KW generator can produce 250A at 48V, and the breaker should be 12KW *125% or 62.5 amps. You may have an unbalanced load, you probably can only put 6KW per leg of the 240V feed.
On Sat, Feb 8, 2014 at 2:46 AM, <br...@willpowerelect.com> wrote: > Hi All, > > 3 VFX 3648 > 2 FM 80 > 6.5 kw solar > 12 kw generator > PSX 240 on generator output and VFX stacking > Mate 3 > HUP 1690 ah > > System design considering 45 amp charge current from each VFX totaling 135 > amps. (135 x ~55v = 7.42kw) Potential charge current from 2 arrays and FM > 80's, 90 - 100 amps. On a good day, reasonable to expect 200+ amps? > Have not been able to exceed 90 amps for more than 30 minutes, with the > generator putting out about 9 kw before it's 70 amp 2pole breaker trips. L1 > 42 amps, L2 37 amps. 5 amps neutral. Load banked to 12.3 kw (51 amps @ > 240v) resistive without breaker trip. > I have had to dial back the maximum charge current in the Mate 3 to 12 > amps each on two of the inverters (L1 and L2) and 8 on inverter 3 to keep > the generator from tripping out when customer turns on the microwave or > coffee pot. In effect, 42 amps charge @ 240 v = 7.6 kw. At the battery, I'm > only seeing 80 amps of charge current. Running loads are typically less > than 1 kw but there has been a of construction going on with chop saws and > compressors creating annoying spikes that are easily handled by the > inverters when the generator is off. > I don't want to kill this new battery by not feeding it properly! I would > have put in a larger generator, but the owner bought the 12 kw before > deciding on the new battery. I thought the 12 would be merely adequate, but > not so.... > Any suggestions? > > Thanks! > > Bruce Fiero-RMI > > > > > > *"I'd put my money on the sun and solar energy. What a source of power! I > hope we don't have to wait until oil and coal run out before we tackle > that." T. Edison, 1931* > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > -- Chris Mason President, Comet Systems Ltd www.cometenergysystems.com Cell: 264.235.5670 Skype: netconcepts
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