Solar Voltage Regulator

Solar Voltage Regulator

Product name:PWM solar charge controller 20A
Model No.:CL12/24- 20DU
Working principle:PWM Solar Charge Controller is a photovoltaic (PV) charge controller that tracks the PV array to deliver the available current for charging batteries. When charging, the Controller regulates battery voltage and output current based on the amount of energy available from the PV array and state-of-charge of the battery.


20a pwm solar voltage regulator controller information

20A 12v 24v auto switch LCD display PWM off-grid solar voltage regulator controller

CL series is a new series of intelligent multi-purpose solar charge controller

It is equipped with explicit LED for you choice.While meeting functional needs,it also offers user-friendly .installation and operation.All in all,it is a popular high-efficient product.

Technical Data for CL20a charge controller





PV input voltage


Rated charge current



System voltage

12V/24V Auto

Battery over-voltage protection voltage

16.00V×1/×2/×3/×4 (0.5V differents)

Rated discharge current



≤13mA (12V),≤16mA(24V)

Charge loop voltage drop


Discharge loop voltage drop

≤ 0.1V

Charging mode

PWM 4 stages (bulk, absorption,float,equalized)

Float Charge Voltage


Absorption charge voltage

14.4V(13V~15V) ×1/×2/×3/×4

Duration of Absorption Charge


Voltage of equalized charging *

14.6V(13V~15.5V) ×1/×2/×3/×4

Duration of equalized charging


Low voltage disconnection

10.7V(10V~14V) ×1/×2/×3/×4

Low voltage reconnection

12.6V(10V~14V) ×1/×2/×3/×4

Load working mode

Regular control mode,Light control with switch-off point at night and switch-on point before dawn,Light control mode

Light control voltage

5V(1V~10V) ×1/×2/×3/×4

Battery type



USB port




LCD,2 buttons


PCB terminal, ≤10mm2

Working temperature

-20 ~ +55 °C

Storage temperature

-30 ~ +65 °C

Working humidity

10% ~ 90%, no condensation





IP code


Optional function

Remote communication,TTL, standard ModBus protocol

Connection diagram

Packaging for pwm solar charge controller

About 20amps simple solar charge controller

• Automatic identification system voltage, 12/24V auto recoginition.

• Humanized LCD displaying and double button operation of man-machine interface.

• Completed technical data for setup and modify.

• High efficiency intelligent PWM 4 stage charging.

• The load control mode can be selected, the timer function can be reset for street light at night.

• Discharge counter of Ampere hour.

• Reliable over voltage protection, short circuit protection, over load protection, over charge protection, over-discharge 


Application for solar charge controller 

Our Advantage

Our factory

Our market



Q1: What is your terms of payment?

A: 1.Sample: 100% of the sample cost before sampling.

2. Mass Production: 30% deposit in advance, 70% balance when finished.

3. Payment terms: usually T/T, also support West Union, PayPal, etc

Q2: What’s kinds of battery will you provide?

A: All the specification can be customized, such as the parameter of 2v, 4v, 6v, 10v, 12v batteries.

Q3: Can you print my logo on the battery cover?

A: Yes, OEM is available, we can print your logo on the battery case, and you can offer your logo.

Q4: What’s the delivery time?

A: 1.Sample ready in 7-15 days, depends on the requests.

2. Mass production ready in 15-30 days, depends on the qty & factory’s producing.

Q5: How to maintain the battery?

A: The battery should be stored in clean, dry, ventilated, dark environment when not using, keep it after full charge, and recharge it every 3 months or 6 months.

Q6: If a battery fails, what will be the indications?

A: 1.Lower performance 

2.Low voltage 

3.Cannot charge/recharge 

4.Swelled container 

5.Acid corrosion

Q7:If there are defective batteries in the warranty, what’s your policy to replace them?

A: Please take the photos of the broken batteries for us and tell us what happen, if everything is confirmed, thenew ones will be sent to you as compensation in the next order.

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