AIMS Power Global LF Series, User Manual

Page: 11 / 40

9
De-sulphation
The de-sulphation cycle (
switch position 8
) is a very dangerous setting if you do not know what you are
doing. Before attempting to use this cycle, you must clearly understand what it does and when and how
you would use it.
What causes sulphation? This can occur with infrequent use of the batteries or if the batteries have been
discharged low enough that they will not accept a charge. This cycle is a very high voltage charge cycle
designed to try to break down the sulphated crust that is preventing the plates from taking a charge and
allowing the plates to clean up and accept a charge once again.
Charging depleted batteries
The Global LF series inverter allows a generator to start up and through power (bypass) after batteries
are depleted. See top of page 10 for generator recommendation.
For 12VDC models: after the battery voltage goes below 10V and the power switch is kept in the "ON"
position and the inverter stays connected to the battery and the battery voltage doesn’t drop below 9V,
the inverter will be able to charge the battery once qualified AC inputs are present.
Before the battery voltage goes below 9VDC, the charging can be activated when the switch is turned to
“OFF”, then to “ON”.
When the voltage goes below 9VDC, and you accidentally turn the switch to OFF or disconnect the
inverter from the battery, the inverter will not be able to charge the battery once again, because the CPU
loses memory during this process.
For 24VDC models: multiply all VDC by 2.
For 48VDC models: multiply all VDC by 4.
Charging current for each model
The charging capacity will go to peak charge rate in approximately 3 seconds. This may cause a generator to
drop frequency, making the inverter transfer to battery mode. It is recommended to gradually put the
charging load on the generator by switching the charging switch from min to max. Together with the 15s