Three Step Charging; Bulk; Absorption; Float - Victron energy MPPT 75/10 Manual

1.8 Three step charging

The controller is configured for a three step charging process: Bulk – Absorption - Float.
See section 3.8 and section 5 for default settings.
See section 1.9 for user defined stings

1.8.1. Bulk

During this stage the controller delivers as much charge current as possible to rapidly
recharge the batteries.

1.8.2. Absorption

When the battery voltage reaches the absorption voltage, the controller switches to constant
voltage mode.
When only shallow discharges occur, the absorption time is kept short in order to prevent
overcharging of the battery. After a deep discharge the absorption time is automatically
increased to make sure that the battery is completely recharged.
Additionally, the absorption period is also ended when the charge current decreases to less
than 1A.

1.8.3. Float

During this stage, float voltage is applied to the battery to maintain a fully charged state.
When the battery voltage drops below float voltage during at least 1 minute a new charge
cycle will be triggered.
1.8.4. Equalization
See section 3.8.1
2