Charge controller manual?

I recently got a cheap PWM charge controller to be able to charge my batteries individually to do some tests and charge my car battery if i need to. The controller says Max PV voltage 50v and Max PV power 390W. In the manual it has a note "12v battery with 18v solar panel. 24v battery with 36v

12V /24V/48V 10A/20A/30A Solar Controller Manual PWM Solar Charge Controller

CMTP02 - disassembling this solar charge controller - DIY Projects

Led Lcd Display Intelligent Pwm 12v 24v 30a 10a 20a 10 20 30 Amp Manual Pwm Off Grid Solar Panel Charge Controller For Pv Modu , Find Complete Details

Led Lcd Display Intelligent Pwm 12v 24v 30a 10a 20a 10 20 30 Amp Manual Pwm Off Grid Solar Panel Charge Controller For Pv Modu - Buy Manual Pwm Solar

Temank supply Intelligent PWM 20A 12V 24V Solar Panel Charge Controller with high quality

Temank Intelligent PWM 60A 12V 24V 36V 48V Solar Panel Charge Controller With LCD Display

100A MPPT Solar Charger Controller, EEEkit Solar Panel Regulator Charge Controller Auto Focus Tracking, High Charging Efficiency, Dual USB, MCU Control, Build-in Timer(Blue)

MPPT 30A Charge Controller 12V 24V – Great Solar Panels

Manual PWM Price Solar Charge Controller China Supplier

12V 24V/48V 10A/20A/50A Solar Charger Controller PWM Solar Controller Manual PWM Solar

Temank supply 12V 24V 30A MPPT ML2430 Solar Charge Controller

CM Series (4-10 A) for Low Power Applications

ZHCSolar Solar Charge Controller 80A 12V 24V PWM Solar Panel Charger Regulator for Renewable Energy 1920W Max with USB Multi Circuit Protection Anti-Fall Durable ABS Housing Enhanced Heat Sink