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Bulk Charge: This algorithm is used for day to day charging. It
uses 100% of available solar power to recharge the battery and
is equivalent to constant current.
When the battery has charged to the Boost
voltage set-point, it undergoes an absorption stage which is
equivalent to constant voltage regulation to prevent heating and
excessive gassing in the battery. The Boost time is 120
minutes.
Float Charge: After Boost Charge, the controller will reduce
the battery voltage to a float voltage set point. Once the battery
is fully charged, there will be no more chemical reactions and all
the charge current would turn into heat or gas.Because of this,
the charge controller will reduce the voltage charge to smaller
quantity, while lightly charging the battery. The purpose for this
is to offset the power consumption while maintaining a full
battery storage capacity.
Boost Charge:
In the event that a load drawn from the battery exceeds the
charge current, the controller will no longer be able to maintain
the battery to a Float set point and the controller will end the float
charge stage and refer back to bulk charging.
Equalization:
Is carried out every 28 days of the month. It is
intentional overcharging of the battery for a controlled period.
Certain types of batteries benefit from periodic equalizing
charge, which can stir the electrolyte, balance battery voltage
and complete chemical reaction. Equalizing charge increases
the battery voltage, higher than the standard complement
voltage, which gasifies the battery electrolyte.
Once equalization is active in the battery charging, it will not exit
this stage unless there is adequate charging current from the
solar panel. There should be NO load on the batteries when in
equalization charging stage.
WARNING
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