Victron energy BlueSolar MPPT 75/50 Manual Del Usario página 4

1.8 Automatic battery voltage recognition
The MPPT 75/50 will automatically adjust itself to a 12V or a 24V
system.
1.9 Adaptive three step charging
The BlueSolar MPPT Charge Controller is configured for a three
step charging process: Bulk – Absorption - Float.
1.9.1. Bulk stage
During this stage the controller delivers as much charge current
as possible to rapidly recharge the batteries.
1.9.2. Absorption stage
When the battery voltage reaches the absorption voltage setting,
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 2 A.
1.9.3. Float stage
During this stage, float voltage is applied to the battery to
maintain it in a fully charged state.
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