7
1-5 Battery Capacity
Battery capacity (SOH)*1 over 10 years.
A batteries capacity to maintain its charge 'State of Health' (SOH) slowly decreases over time due to the charging &
discharging process.
The following chart shows typical SOH decrease.
[ time ]
10 years
0 years
4:00h
Discharge
time *2
*1 : SOH =
S
tate
o
f
H
ealth
*2 : at 25°C, 1 cycle/day
<
2:24h
8kWh
Usable
capacity *2
<
4.8kWh
100%
SOH
*1
<
60%
1-6 Battery Charge and Discharge cycles
A 'one charge/discharge cycle' definition is when the batteries over a 24 hour period are discharged to their minimum
remaining battery level then re-charged to their maximum remaining battery level. This is the recommended and
factory default known as 'Maximum Self consumption Mode'.
We do not recommend charge/discharge mode that exceed the one per day cycle (i.e multiple daily full charge/
discharge) as the battery charge capacity will fall below 60% sooner than 10 years.
