Hi guys, The HUP manual specifies minimum charge rate of 136 amps, max at 272,
jay peltz power On Feb 9, 2014, at 1:38 AM, RE Ellison wrote: > Sounds like there is a need for a bigger generator, my gut tells me there is > almost enough (but not quite), with 12kw to almost max the chargers and > nothing left to feed the other loads. > I have found that “on paper” and reality do not always mix well. > Getting max theoretical charging capacity from solar and the generator at the > same time is sometimes a tough nut to crack, although batteries seem to > “like” the varying charge better than a steady max charge. That battery can > probably absorb 420 amps as the charging max using the usual 3 stage charging > we have with inverters, you’re not getting anywhere near enough to max them > with that generator. Powering down all the chargers 30% or so (or 1 inverter > totally) would help stop the breaker trips but slow the charging off the > generator. Then you just need to pray for lots of sun. > Is the solar alone enough to power the loads in the normal day to day usage > in a best case situation, or is this a case of the generator has to run to > keep up? > > Up here we have seen 1 sunny day in 3 weeks, we know about generator usage….. > > I can’t speak on the HUP’s. I have never used them, but might they be > somewhat hard to charge? > > Just some thoughts, but it’s 3 am and I hope it makes sense in the morning > when I reread it…. > > Later, > Bob > > > > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of > br...@willpowerelect.com > Sent: Sunday, February 09, 2014 1:29 AM > To: RE-wrenches > Subject: Re: [RE-wrenches] Charging a HUP > > Hi Larry, > > I have an FNDC in the system. Manufacturer wanted 2 hour EQ before adding > water to the new battery. We got that and had SG between 1.260 and 1.275 on > all 24 cells. Cells were very thirsty (shipped with electrolyte almost to the > plates) and took 8.5 gallons between all cells. We aren't having much trouble > getting voltage back up but SG is below 1.23 (within .01 on cells tested). > Strategy at this point is to give a daily bulk and absorb and EQ every 3 or 4 > days for extended times and monitor SG. Discontinue hard charging when SG > plateaus. I generally shoot for c/10 charge current, and nervous about barely > c/20 and a 12kw genset only giving me about 5. > > Bruce > -------- Original Message -------- > Subject: Re: [RE-wrenches] Charging a HUP > From: "Larry Crutcher, Starlight Solar Power Systems" > <la...@starlightsolar.com> > Date: Sat, February 08, 2014 11:50 am > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > > Hi Bruce, > > Please explain "feeding it properly". Charging any lead acid battery slowly > actually preserves battery life. As long as you are achieving the recommended > charge voltage (temperature compensated) for long enough time, and reaching > 100% SoC regularly, you are caring for the battery. > > At 82kWh battery capacity and 6.5kW PV, the customer may have a hard time > getting to 100%. You did not mention, but I HOPE you have a battery capacity > meter in the system. It's mandatory if they want to care for the battery. > Since the customer has a small generator, they need to realize the > limitations and reduce their loads during generator time so you can use the > full output. > > Larry > > On Feb 7, 2014, at 11:46 PM, 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 > > > <sigimg0.jpeg> > > s.re-wrenches.org >
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