wa8yxm
Davison Michigan (East of Flint)
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First you said "100 watt" that's about 10 Amp hour
Or did you mean 100 amp hour.. Ok.
Item 1: Unless you upgraded the conveter to an LI they never hit full so you don't have the full 200 AH (I'm assuming 200 ah total) You might have 180-190 but even to get there takes 6-8 hours of generator time or more depending on your converter.
Next that Refrigerator is likely around 200 watts running 100-150 average. Divide by 10 or 12 volt power consumption so it's 10-15 amps.. You only have woo
The sat receiver may well draw as 30-70 100 watts (3-10 amps)
We are now up to around 25 amps draw You only have 200 amp hours and I've not yet added in the CPAP (those can draw a bit of power if humidified. and that's the best kind) so you are below 8 hours at full charge.. and you were not likely at full charge.
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msmith1199
Reno, NV
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Yes, I meant AMP. Told you I’m no electrician! And it’s only one A/C. I’m guessing I wasn’t at full charge, but I don’t understand exactly why. Like I said, I’m on day 7 and every other day there was power in the batteries to last all night. And when starting the generator the next morning you can tell the batteries were still strong. Just wondering why on night 7 it didn’t work. The tech department at the converter maker said it’s possible I was simply using 5% a day more power than I was charging and by the 7th day that resulted in a 35% loss so that’s why it gave out on the 7th day. I’ll run the generator longer today and see what happens tonight.
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CA Traveler
The Western States
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Joined: 01/03/2004
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OP Your posts suggest that over the 7 days you used 160AH (80%) of your batteries that was not replenished due to inadequate charging. It's likely setup for flooded batteries and not for the LiPo batteries.
Your A/C is not the cause. If your A/C plus charger tried to draw more AC amps that the CB rating then the CB would have tripped on the gen.
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pianotuna
Regina, SK, Canada
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Joined: 12/18/2004
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The OP is seeing 14.5 volts when the generator is running.
I wonder why the batteries are not fully charging when presented with that?
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.
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ScottG
Bothell Wa.
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Joined: 02/25/2005
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From your orig post "The voltage at the batteries both with the generator running and without is 13.6 volts. I think those numbers mean it’s should be working fine."
13.6 is not going to charge Lithium batteries. Something is very wrong between the converter/charger and your batteries. You should be seeing well over 14V.
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msmith1199
Reno, NV
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CA Traveler wrote:OP Your posts suggest that over the 7 days you used 160AH (80%) of your batteries that was not replenished due to inadequate charging. It's likely setup for flooded batteries and not for the LiPo batteries.
Your A/C is not the cause. If your A/C plus charger tried to draw more AC amps that the CB rating then the CB would have tripped on the gen.
It’s set for LiPo
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msmith1199
Reno, NV
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ScottG wrote:From your orig post "The voltage at the batteries both with the generator running and without is 13.6 volts. I think those numbers mean it’s should be working fine."
13.6 is not going to charge Lithium batteries. Something is very wrong between the converter/charger and your batteries. You should be seeing well over 14V.
The converter is putting out the 14.5. The 13.6 is at the battery. According to sources I looked up, 13.6 indicates a fully charge LiPo battery. So I don’t know if it’s supposed to show 14.5 at the battery when charging or if it’s correct in showing 13.6 even when charging.
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wa8yxm
Davison Michigan (East of Flint)
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What is the make and model (And ampreage) of your converter
You have 300 amp hours of batteries. Let's say you use 80% (240 amp ours)
Well converters can be as low as around 20-25 amps or as high as 100.
To replace 240 amp ours will take at least 250 amp hours.. 25 amps that's 10 hours in theory.. but wait there's more.
As the battery charges the converter "Backs down" a bit so it might take 12 or more.. and if it's not a LI-charger (Still an LA charger (Lead acid) it may well never it 100% because it simply has not the push to do it.
3.4 volts resting. 3.65 charging times 4 cells = 13.6 volts resting and 14.6 charging.... Many converters are 13.6 Float(that's good) and some that's all they do and 14.2-14.5 Boost/Absorption (Not enough) to fully charge LiFePO4.
(Voltage source google)
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msmith1199
Reno, NV
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Okay, batteries lasted all night and showed fully charged still this morning. I ran the generator longer yesterday and reduced power consumption so I don’t know which one really fixed the problem. But the problem is solved. I’ll just keep that pattern going.
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wolfe10
Florida
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msmith1199 wrote:The converter is putting out the 14.5. The 13.6 is at the battery.... So I don’t know if it’s supposed to show 14.5 at the battery when charging or if it’s correct in showing 13.6 even when charging.
The only reason for a higher voltage reading at the converter than at the battery bank is RESISTANCE between the two. Could be a connection at one end or the other, could be a fuse (if there is one) between them, could be too small a gauge wire.
And, the lower the charge rate, the less voltage drop you should see.
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