Battery Charging Settings
It is important to select the correct battery setting for the battery type used in the solar
system. Refer to the specifications provided by the battery manufacturer and choose
a setting that best fits the recommended charging profile.
There are 4 charging stages:
Bulk Charging: This is the initial stage of charging. While Bulk Charging, the charger
supplies the battery with controlled constant current. The charger will remain in Bulk
charge until the Absorption charge voltage (determined by the Battery Type selection)
is achieved. The green LED will blink once every 0.5 seconds during bulk charging.
Absorb Charging: This is the second charging stage and begins after the
battery has recharged to the set absorption voltage. Absorb Charging provides
the batteries with a constant voltage and reduces the DC charging current,
maintaining the absorb voltage setting. This prevents heating and excessive
battery gassing. The green/blue Led will blink once per every two seconds
during absorption charging.
Float Charging: The third charging stage occurs at the end of the Absorb Charging
time. While Float Charging, the charge voltage is reduced to the float charge voltage
(determined by the Battery Type selection). In this stage, the batteries are kept fully
charged. The float stage provides a very low rate of maintenance charging while
reducing the heating and gassing of a fully charger battery. This protects the battery
from long term over charger. The green/blue LED will keep green during float charging
Equalize Stage
Equalize charging will charge in a higher voltage to kick start battery activity, usually
this cycle lasts about 30 minutes depending on battery type. Only for open lead acid
batteries and this stage occurs every 30 days.
Network Connections
Network connections allow the MPPT controller to communicate with computers. A
network can be as simple as one controller and one PC, or as complex as dozens of
controllers monitored via the Internet. RS485 cable needed and not included.
WARNING: Risk of Explosion
Equalizing vented batteries produce explosive gases. The battery bank must be
properly ventilated.
Battery type
Bulk charge stage
Absorption charge
stage
Float charge stage
Same as bulk charge voltage-
Same as bulk charge voltage
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