Sunday 5-1-11
peak amps 15.29
peak watts 209.20
total amphrs 110.4
total watthrs 1590.9
this was absolute minimum use of generator,
make coffee, make breakfast 30 minutes, heat lunch 6 min, heat supper 7PM 15min
this lucks real good, until you subtract the power used during the same time period,
several fans, 120v residential fridge cycling on off, parasitic loads etc.
by dusk at 8pm ZERO solar output
total measured power consumed "turnigy power meter" 80.99 amphrs, 1063.4 watthrs
net gain 29.41 amp hrs, 527.5 watthrs, or 6.6% of capacity
assuming that my batteries were full at 8pm saturday night, and that they were at a calculated 75% this Morning, they needed to absorb 110amp hrs to recharge to full, the net gain recharge equaled 26.73% of NEEDED, 6.6% of total capacity, so I went up to 81% SOC
this was for the 11hr period from 9am to 8pm and included (2) hrs of TV 6-8pm, the worst time as far as charge compensation, but we are NOT day time TV watchers except for special events, ( she loves figure skating ) and watched 4hrs on Sat, when the generator was topping off the batteries
the upside is that during the middle of the day the numbers were much better
at 11:56 am solar 13.28a @ 14.77v 195.9w output
total was at 47.7ahrs
power use was at 17.9ahrs
62.5% of solar power returned to batteries 37.5% used,
29.8amphrs returned just 0.51 amps hrs less than the total for the whole day
at 3:09 pm solar 10.43a 14.8v
total 86.86 amphrs 1258.5 whrs,
used = 36.28 481.5 whrs,
Net gain 50.32 amphrs , 773.4 whrs returned to the batteries,
4:42 pm solar 9.22a @ 13.69v
total 103.05 ahrs 1491.7 whrs,
used = 48.23 ahrs 643.2 whrs
Net gain 54.82 ahrs 848.5 whrs
( this is the point where I should have started the generator )
after this it starts loosing instead of gaining
5:38pm charge is down to less than 1.9amps 12.65v
battery is discharging at the rate of 6.2 amps ( my use is more than the input )
loads total 8.1amps
solar total 108.63 ahrs 1568.5 whrs , total used ?? i didn't record it
6:22pm solar output 1.5a 12.49v
battery discharge 19.1 amps, total load 20.6amps
lights TV etc..
6:50 solar 1amp
8pm NO solar output
total solar 1590.8 whrs, 110.4 ahrs
total used 88.99 ahrs 1063.4 whrs used
(2) hrs of TV was a good size dent approx 38 ahrs consumed
conclusion batteries at 81% SOC at 8pm sunday night, Monday morning expect batteries to be approx 55-60% SOC
while I can maybe do this for 1 or 2 days ??
we are better off charging the batteries to 90% in the morning and letting the solar top off the batteries and supply the daytime usage so the batteries are at a higher SOC come dark, our net gain is more by charging in the morning and not suffering as much net LOSS, with another charging run in the evening, when the battery drain is the heaviest and solar output the least
these numbers Reflect our system and OUR use patterns
the 120v electric compressor fridge uses power that an LP fridge would not use IF on LP,(but less power than an Absorption fridge on 120v )
our batteries are NEVER at rest, they are always in use, unless the charge power is greater than the power drain, then they are charging, when NOT charging they are being used, we full time, the inverter power is is always on, it might be idling, it might be charging our phones or PC's, it might be running the fridge
we have two 12v 300MA fans behind the fridge the are on 24-7 unless being cleaned
as always your MILEAGE WILL VARY
this was an attempt at max solar charging
the morning battery readings will be the telling sign
Don't know if I can do this (2) days in a row, don't know how hard it will be on the 4 GC's, i'll make that decision tomorrow, or have it made for me by expedient need of recharge ??
I can explain it to you.
But I Can Not understand it for you !
....
Connected using T-Mobile Home internet and Visible Phone service
1997 F53 Bounder 36s
