2.5. Battery charger
The batteries are charged by solar energy using the built-in MPPT solar controller. It can also be charged by a PV grid inverter
connected to the AC out. In this case the battery will be charged to ~98%. The built-in MPPT has a power limit of 4000W. So the
maximum charging current for a 50V battery will be 80A. If an additional PV grid inverter is connected (max 5000W) the maximum
total charging current is limited to 100A. The maximum charging current of 100A is reduced if battery voltage goes above 60V. A
custom maximum charge current value can also be defined by the installer in VictronConnect.
The charger algorithm is the same as for the BlueSolar MPPT solar controllers. This provides built-in battery preset parameters,
and allows for expert mode to define additional charging parameters. Please see the MPPT section of the VictronConnect manual
for additional explanation of these charging features.
2.6. Setup options
Adaptive three step charging
The MPPT Charge Controller is configured for a three step charging process: Bulk – Absorption – Float.
A regular equalization charge can also be programmed.
Bulk- During this stage the controller delivers as much charge current as possible to rapidly recharge the batteries.
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.
Float - During this stage, float voltage is applied to the battery to maintain a fully charged state.
Optional external voltage and temperature sensor
Wired connections are available for battery voltage and temperature sensing. The Solar Charger uses these measurements to
optimize its charge parameters. The accuracy of the data it transmits will improve battery charging efficiency, and prolong battery
life.
The Smart Battery Sense and other VE.Smart networking features are not currently supported.
Remote on-off input
On/off control by a VE.Bus BMS when charging Li-ion batteries.
Remote L functions as ‘allow to charge’ in case lithium battery is selected and remote H functions as ‘allow to discharge’. Use
smallBMS for the RS with Victron lithium batteries.
Programmable relay
Can be programmed (with a smartphone) to open or close on an alarm, or other events.
Inverter RS Smart
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General Description
