Enernova ETA - Page 10

3.3 Battery Cells
3.3.1 Power Reserve:
The power storage capacity marked by the power supply are rated
values. The rated power storage of the power supply is shown in the
parameter label in the power supply manual, which is usually marked
directly *Wh, and also marked with the rated voltage (V) and rated ca-
pacity (mAh), and the power storage (Wh) = rated voltage * rated capa-
city (mAh) /1000.
3.3.2 The Actual Power Discharged From the Power Supply:
The actual power discharged by the power supply is related to the fol-
lowing parameters:
1) Ambient Temperature
Ambient temperature has a large impact on the amount of power rele-
ased from the battery. For example, the range of electric vehicles will
be shortened when used in cold areas. Generally speaking, based on
the rated 25 °C (77°F), for every 10 °C(50°F) lower than 0°C(32°F), the
power released will be reduced by 10-15%. For every 10 °C(50°F) below
0°C(32°F), the amount of power discharged will be reduced by 30%.
2) Efficiency
During the discharge process, the battery voltage needs to be transfor-
med, which inevitably brings energy loss, especially in the inverter (AC
output) part, which is affected by the ambient temperature and the
power level of the equipment being run, with losses ranging from
5-15%. Therefore, the measured power discharged from the output
side under full load is only 85%-95% of the rated capacity.