LifePo4 Voltage at .5C - .6C Discharge
Our two GC2's (with 100% charge) drop below 12v while under a 100a - 125a load. When they reach 50% (at 100a - 125a), voltage drops into the low 11's while under-load. What kind of under-load volt...
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Hi BFL13,
As a battery discharges the voltage starts to drop.
By the time it reaches 50% of the amp-hours, voltage is some what lower than it was at 75% state of charge.
When the battery reaches 10% state of charge voltage is again lower.
Since watts are the product of amps X volts, and the voltage is lower--there is less energy in watt-hours remaining, even though the amp-hours are at 50% of full.
I started a thread on Battery Monitoring basics that shows some graphs to help bend your mind around this.
I know you hate watts--but watt-hours are a better measurement of energy than amp-hours.
As a battery discharges the voltage starts to drop.
By the time it reaches 50% of the amp-hours, voltage is some what lower than it was at 75% state of charge.
When the battery reaches 10% state of charge voltage is again lower.
Since watts are the product of amps X volts, and the voltage is lower--there is less energy in watt-hours remaining, even though the amp-hours are at 50% of full.
I started a thread on Battery Monitoring basics that shows some graphs to help bend your mind around this.
I know you hate watts--but watt-hours are a better measurement of energy than amp-hours.
