Victron energy SmartSolar MPPT 150/35 Manuel page 4

1.8 Flexible charge algorithm
Fully programmable charge algorithm, and eight preprogrammed
algorithms, selectable with a rotary switch.
1.9 Adaptive three step charging
The SmartSolar MPPT Charge Controller is configured for a three
step charging process: Bulk – Absorption – Float.
1.9.1. Bulk
During this stage the controller delivers as much charge current
as possible to rapidly recharge the batteries.
1.9.2. Absorption
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 2A.
1.9.3. Float
During this stage, float voltage is applied to the battery to
maintain it in a fully charged state.
When the battery voltage drops below float voltage during at least
1 minute a new charge cycle will be triggered.
1.9.4. Equalization
See section 3.8.
1.10 Remote on-off
The MPPT 150/35 can be controlled remotely by a VE.Direct non
inverting remote on-off cable (ASS030550300). An input HIGH
(Vi > 8V) will switch the controller on, and an input LOW (V < 2V,
or free floating) will switch the controller off.
Application example: on/off control by a VE.Bus BMS when
charging Li-ion batteries.
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