opti-solar Sp4000 Premium, User Manual

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17. Charging Management
Charging Parameter Default Value Note
Charging current 60A
It can be adjusted via software
from 10Amp to 80Amp.
Floating charging voltage (default) 54.0 Vdc
It can be adjusted via software
from 50Vac to 64Vdc.
Max. absorption charging voltage
(default)
56.0 Vdc
It can be adjusted via software
from 50Vac to 64Vdc.
Battery overcharge protection
66.0 Vdc
Charging process based on default
setting in 3 stages:
First – max. charging
voltage increases to 56V;
Second - charging voltage
will maintain at 56V until
charging current is down to
12 Amp;
Third - go to floating
charging at 54V.
This inverter can connect to battery types of sealed lead acid battery, vented battery, gel
battery and lithium battery. The detailed installation and maintenance explanations of the
external battery pack are provided in the manufacturer’s manual.
If using sealed lead acid battery, please set up the max. charging current according to
below formula:
The maximum charging current = Battery capacity (Ah) x 0.2
For example, if you are using 300 Ah battery, then, maximum charging current is 300 x
0.2=60 (A). Please use at least 50Ah battery because the settable minimum value of
charging current is 10A. If using AGM/Gel or other types of battery, please consult with
installer for the details.