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i. Auto Gen-start will be triggered when the battery voltage or percent reaches the level programmed in the
Battery Setup menu. Then, the generator will continue to charge the batteries until they are about 95% full (this
percentage is not programmable) before turning the generator off.
F. We recommend changing the "Grid Reconnect Time" under the Grid
Selection tab of the grid setup menu to 30 seconds; otherwise, the Sol-Ark
will not charge from the generator until it has been on for at least 5 minutes
per the default value of 300 seconds
G. Under setup for Limiter: Other, select "GEN connect to Grid Input."
And General Standard in the Grid Selection tab. Then, ensure to widen the
input frequency range to 55-65Hz to work with any frequency generator.
H. If you want to use a wind turbine with the Sol-Ark 30K-3P-208V, the
turbine must have a 400V charge controller with a dump load to prevent
overcharging the batteries. Connect the charge controller on the turbine
to the battery bank the Sol-Ark uses, and the turbine will help charge the
batteries.
I. Don't forget to set the Battery capacity and reasonable
charge/discharge rates
3.2.9.2 Grid-Tie / No Battery Install Tips
A. Under Battery setup, select no Battery & disable Activate Battery
(or the system will beep)
B. Note: a whole system power cycle is required when changing
the battery to no battery settings
C. Under the Limiter Setup, select Grid Sell
D. Touch the Battery Icon to see the Detailed Volts View to verify
your inputs & outputs.
3.2.10 Batteries Charging Information
3- Stage Charging
The MPPT has a 3-stage battery charging algorithm for rapid, efficient, and safe battery charging. The figure
below shows the stage sequence.
Bulk Charge Stage
In the Bulk Charge stage, the battery is not at
a 100% state of charge and has not yet
reached the Absorption voltage setpoint. The
controller will deliver 100% available solar
power to recharge the battery.
Absorption Stage
When the battery has reached the absorption
voltage setpoint, we use constant-voltage
regulation to maintain battery voltage at the
absorption setpoint, preventing heating and
excessive battery gassing. The battery can come to a full state of charge at the absorption voltage setpoint.
Absorption lasts until batteries charge at 2% of the programmed Ah size.
Float Stage
After the Absorption stage charges the battery fully, the MPPT reduces the battery voltage to the float voltage
setpoint. If batts have 100% charge, there can be no more chemical reactions, and all the charging current turns
into heat and gassing. The float stage provides a meager rate of maintenance charging while reducing the
heating and gassing of a fully charged battery. The purpose of float is to protect the battery from long-term
overcharge.
NOTE: Find our full list of currently supported battery communications
www.sol-ark.com/battery-partners
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