measured voltage and battery state of charge

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#1 | measured voltage and battery state of charge datum

Sat Oct 23, 2021 2:58 pm (Last edited: Sat Oct 23, 2021 3:04 pm)

Here is a little chart that I was sent by Batterystuff.com which shows the relationship between measured voltage and the remaining level of charge of a typical lead-acid battery:

State of Charge - Voltage

100% - 12.7 - 13.2
75% - 12.4
50% - 12.1
25% - 11.7
Discharged - 0 - 11.6

Current motorcycle collection: 2002 Yamaha FZ1; 2020 KTM 390 Duke; 2011 Royal Enfield Bullet 500; 2009 BMW F650GS; 2016 BMW R1200RS; 2018 Zero S 16.6 kWh

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#2 | RE: measured voltage and battery state of charge datum

Sat Oct 23, 2021 6:37 pm

Battery voltages can recover after use to give an inflated charge state.
In the old days of wet cells, a hydrometer was the best way to get a true value of discharge.

Alan

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