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I have a question on loss when charging and discharging.
I have a question on loss when charging and discharging.
I was informed to expect 10% loss on the charging and 10% on the discharge when consuming.
I have x4 Fox ESS 5200 batteries giving me 20kWh.
Tonight I was running low on battery juice and turned off none essential items.
My lads still used their PC’s but turned off 2 of the 3 monitors.
I turned off all of the vampire juice suckers and sat in the dark.
I know its stupid, I going to pay 29p at the most. But that’s my 29p. Haha.
I was watching the batteries discharge was 1214watts. My consumption was 1058.
Isn’t that 20% loss or am I missing something?
At midnight I’ll watch the meter readings, charge into the battery and consumption to see if it also a 20% loss.
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8 Replies
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I get a similar results from mine. The inverter consumed about 30W when it’s idling. I think my conversation loss is around the 15% mark.
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I ran out of battery storage at 23:15
The batteries were idle, not charging and not discharging, My Consumption showed as 1041 inport from the grid was 1198, Around 15% loss excluding the DC to AC conversion.
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I work that out at a little under 13% not far off?
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This is a post for dull men’s club … lol . I don’t even worry about the odd time I run out of battery … well not enough to turn stuff off any way . I just enjoy the avg electric cost of 8.3p a kWh last month
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Inverter and the battery itself also consume electricity
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that should be included in the round trip efficency calculations.
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As Stan says, thats under 13% 156 watts (1214-1058) is 12.9% of 1214 and your second figure of 157 (1198-1041) is 13.1% of 1198, so rounded to whole numbers 13% both times.
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20% round trip is high
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