Problem with the TH solar project
Guys I have encountered a couple of problems with my solar project. I am not sure just how to correct/fix or make it work yet. Problem: I will have 4-230W PV panels on the roof, I will have the...
Forum Discussion
Hi Don,
8 feet from the battery bank to the inverter is pushing your luck.
*looks at your palm*
I see in your future life line ultra thick doubled up welding cable from the battery bank to the inverter.
Charging times. 60 amps into 440 amp-hour battery bank. Assumption never go below 220 amp-hours (50% state of charge).
85% state of charge on 440 amp-hours is 374 amp-hours. Acceptance rate at 85% is 12.5 amps. 4.4 x 12.5 = 55 amps. But no one who doesn't have to generator charges from 85% to 100%. It simply takes too many hours.
220 - 66 = 165 amp-hours to return. 165/60 = 2.75 hours of generator charge time.
Getting to 100% would be an additional 2.75 hours.
So total generator time from 50% to 100% is 5.5 hours
With the Magnum:
165 amp-hours / 125 amps = 1.3 hours of generator charge time.
Getting to 100% still takes an additional 2.75 hours of generator run time.
Total generator run time 3.05 hours to 100% state of charge.
Total savings in run time is 1.45 hours That is BEST case.
I expect that with 920 watts of solar you may never run the generator except to run the roof air. The potential harvest is 4.6 KWH per day.
I'd go with a stand alone inverter that could be placed closer to the battery bank.
It is not that I don't like Magnum. I do. And that is in spite of destroying one.
8 feet from the battery bank to the inverter is pushing your luck.
*looks at your palm*
I see in your future life line ultra thick doubled up welding cable from the battery bank to the inverter.
Charging times. 60 amps into 440 amp-hour battery bank. Assumption never go below 220 amp-hours (50% state of charge).
85% state of charge on 440 amp-hours is 374 amp-hours. Acceptance rate at 85% is 12.5 amps. 4.4 x 12.5 = 55 amps. But no one who doesn't have to generator charges from 85% to 100%. It simply takes too many hours.
220 - 66 = 165 amp-hours to return. 165/60 = 2.75 hours of generator charge time.
Getting to 100% would be an additional 2.75 hours.
So total generator time from 50% to 100% is 5.5 hours
With the Magnum:
165 amp-hours / 125 amps = 1.3 hours of generator charge time.
Getting to 100% still takes an additional 2.75 hours of generator run time.
Total generator run time 3.05 hours to 100% state of charge.
Total savings in run time is 1.45 hours That is BEST case.
I expect that with 920 watts of solar you may never run the generator except to run the roof air. The potential harvest is 4.6 KWH per day.
I'd go with a stand alone inverter that could be placed closer to the battery bank.
It is not that I don't like Magnum. I do. And that is in spite of destroying one.
