Hi can you give me the technical datasheet of the charger?I have got the technical datasheet for the charger now.
The 12V of the charger is not an input - it's an output: 0,5A max to power a relais or something else in order to turn on the BMS. It provides 12V as soon as the AC mains is connected.
Here are the PWM details:
PWM Power control signal: Active high control signal with PWM
PWM signal frequency: 305Hz
PWM signal voltage range:8-30 Vpp
PWM signal modulation: 0% PWM Power OFF - 10% PWM Power MIN 32W - 90% PWM Power MAX, 3200W at 230V input