Full Product Manual

Lithium Activation

U0 U

Bulk

100 %

10 %

Absorption Float

U/V

I/A

This is an automatic process for Lithium batteries. Ensure correct lithium polarity

when connecting to the DC Output.

NOTE

Battery Charging Logic

In the beginning, a discharged battery will be charged with maximum current and voltage will

be climbing steadily until reaching the absorption voltage setpoint.

Bulk (Phase I) (Lead Acid + Lithium)

The battery reaches the absorption voltage setpoint and holds the voltage constant while the

current gradually decreases until the battery is becoming full (within 10-20%). By default,

absorption will not exceed 3 hours to prevent overcharging.

Absorption (Phase U0) (Lead Acid + Lithium)

After the absorption stage, the voltage of the battery will reduce to the float voltage setpoint

and current will also reduce to a low maintenance mode to prevent the battery from

discharging and offsetting any self-discharge. Heavier battery discharge may set controller

back to Bulk/Absorption to replenish energy lost while energy is available.

The DC-DC have reactivation feature to awaken a sleeping lithium battery. The protection

circuit of Lithium batteries will typically turn the battery off and make it unusable if over-dis-

charged. This can happen when storing a Lithium pack in a discharged state for any length

of time as self-discharge would gradually deplete the remaining charge. Without the

wake-up feature to reactivate and recharge batteries, these batteries would become unser-

viceable and the packs would be discarded. A small charge current will be applied to the

house battery to activate the protection circuit and if a correct cell voltage can be reached,

it starts a normal charge.

Float (Phase U) (Only Lead Acid)