2nd battery installed

7 comments started 2024-03-19 last 2024-03-19
GivEnergy ProductsHybridBattery
J
#1 JymDastardly

Hi.

I have had a 2nd battery installed and a hybrid 5 G3 inverter. I have noticed that the soc of the batteries is different. Is this normal or should I recalibrate?

#2 ProximusAl

I would say "Get used to it". Sometimes I can see 30-35% split in the SoC on my pair....

As long as the voltages are within 0.5V you're good.

G
#3 geoffreycoan

Have a look on the forum, this has been discussed before, but in short, yes they will drift apart. A recalibration will bring them back together but it seems that the chained batteries don’t discharge and charge at an even rate. GivEnergy don’t seem to have a fix for this.
If its working fine then there’s nothing to worry about.

D
#4 DD

(I only have one battery...) Perhaps they'll back backn into sync either when they get down to minimum, or reach 100% ? [I would hope that when one of them gets to a limit, the other would keep going, rather than just sitting and sulking.]

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#5 JymDastardly

Thanks all. I will ignore it as the voltages are good 😊

#6 hoggy

It's likely down to the daisy chain nature of the batteries where the "master" one is connected to the inverter and the others chain after - the master always seems to do more work (so charges / discharges first and the rest follow on behind) If it were a ring type setup it'd probably alleviate a lot of this but I don't think anyone's tried, nor is it an approved method.

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#7 Vestas

hoggy Probably worth getting the installer to swap them around during install if the existing one has been in use for a while, making the new battery master - assuming same size/gen/etc....