ACOPOWER PWM20A, Product Introduction

3×40W

Alternatively Display voltage and FUL when battery is fully charged

The unit has a 6-stage charging algorithm.

Diagnose* - Soft Charge – Bulk Charge - Absorption charge – Equalizing Charge* - Float Mode

The VOLT/AMP button can be changed at any time during charging process. 

The LCD also can be treated as an independent voltage meter or thermometer. 

CHARGINGSTAGE

Diagnose * 

– Only for Lithium battery type, subjected to the Lithium battery initial voltage then 

determine going to Soft start or Bulk charge; if the Lithium battery is protected by BMS, the 
controller will automatically send the signal periodically to the battery terminal to activate the BMS 

against protection. 

Soft start 

-When batteries suffer an over-discharge,the controller will softly ramp the battery 

voltage upto10V for 12V battery, 20V for 24V battery. 

Bulk Charge

 - Maximum current charging until batteries rise to Absorption level. For Leadcrystal 

battery type, the charge controller will deliver two step level of Bulk charge,when the first level rises 
the battery voltage up to14.4V, then switch into the second level of the 50% of the first bulk charge 
rate, until the Lead crystal battery voltage up to14.7V. 

Absorption

-Constant voltage charging and battery is over 85% for lead acid battery; a Li-ion 

battery, LiFePO4 battery and LTO battery will close fully charging after absorption stage, the 
absorption voltage level will reach12.6V for Li-ion battery, 14.4V for LiFePO4 battery; 14.0V for LTO 
battery. 14.7V for Lead crystal battery. 

Equalization*

- Only for WET battery or Calcium battery type, when the battery is deeply drained 

below10 Vore very 28 day scycle,it will automatically run this stage to bring the internal cells as an 

equal state and fully complement the loss of capacity. (Lead crystal, Li-ion, LiFePO4,LTO, Gel and 
AGM battery do not run Equalization charge)