Charge Controller Solar

Charge Controller Solar

Product name:PWM solar charge controller 50A
Model No.:NC 12/24 - 50D
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.


50a solar charge controller information

Factory manufacture 12V 24V 50A pwm charge controller solar system 

This is a kind of intelligent, multi-purpose solar charge and discharge controller.

The family use the fixed LCD display, with a very friendly interface; various control parameters can be flexibly set, fully meet your various application requirements.

Technical Data for NC 50a charge controller





PV input voltage


Rated charge current



System voltage

12V/24V Auto or 48V



Rated current


No-load loss


Charge loop voltage drop


Discharge loop voltage drop

≤ 0.12V

Charging mode

PWM 4-stage(bulk, absorption,float, equalized)

Voltage of float charging


Voltage of absorption charging

14.4V(13V~15V) ×1/×2/×3/×4

Duration of absorption charging



10.8V(10V~14V) ×1/×2/×4


12.6V(10V~14V) ×1/×2/×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/×4

Battery type

GEL, SLD, FLD and USr(default)



LCD, 3 buttons

Heat sink

AL alloy heat sink


PCB terminal, ≤25mm2

Working temperature

-20 ~ +55 °C

Storage temperature

-30 ~ +65 °C

Working humidity

10% ~ 90%, no condensation


188 x 133 x 51.5 mm

Net Weight


IP grade


Optional function

Remote communication,TTL, standard ModBus protocol


Temperature sensor

Connection diagram

Packaging for pwm charge controller

About 50 amps charge controller

• Vivid LCD graphic symbols

• Simple button operation

• Automatic identification of system voltage level

• Intelligent PWM charging mode 

• Adjustablecharge-discharge protection

• Automatic temperature compensation

• Settable operation mode of load

• Battery reverse-discharge protection

• Battery low voltage disconnection(LVD)

• Battery reverse connection protection

• Overcurrent protection

Application for solar charge controller

Our Advantage

Our factory

Our market



Q: What's A PWM solar charge controller ?

A PWM solar charge controller stands for “Pulse Width Modulation”. These operate by making a connection directly from the solar array to the battery bank. During bulk charging, when there is a continuous connection from the array to the battery bank, the array output voltage is ‘pulled down’ to the battery voltage. As the battery charges, the voltage of the battery rises, so the voltage output of the solar panel rises as well, using more of the solar power as it charges. As a result, you need to make sure you match the nominal voltage of the solar array with the voltage of the battery bank. *Note that when we refer to a 12V solar panel, that means a panel that is designed to work with a 12V battery. The actual voltage of a 12V solar panel, when connected to a load, is close to 18 Vmp (Volts at maximum power). This is because a higher voltage source is required to charge a battery. If the battery and solar panel both started at the same voltage, the battery would not charge.

Q: What's MPPT solar charge controller ?

An MPPT solar charge controller stands for “Maximum Power Point Tracking”. It will measure the Vmp voltage of the panel, and down-converts the PV voltage to the battery voltage. Because power into the charge controller equals power out of the charge controller, when the voltage is dropped to match the battery bank, the current is raised, so you are using more of the available power from the panel. You can use a higher voltage solar array than battery, like the 60 cell nominal 20V grid-tie solar panels that are more readily available. With a 20V solar panel, you can charge a 12V battery bank, or two in series can charge up to a 24V battery bank, and three in series can charge up to a 48V battery bank. This opens up a whole wide range of solar panels that now can be used for your off-grid solar system.

Q: What are the pros and cons for PWM solar charge controller and MPPT solar charge controller ?

PWM Pros

1.PWM charge controller are built on a time tested technology . They have been used for years in PV systems and are well established.

2.These charge controllers are inexpensive .

3.PWM charge controllers are avaialble in sizes up to 60 amps

4.PWM charge controllers are durable , most with passive heat sink style cooling.

5.These charge controllers are available in many sizes for a variety of applications

PWM Cons

1.The PV input nominal voltage must match battery bank nominal voltage if you're going to use PWM.

2.There is no single controller sized over 60 amps DC as of yet.

3.Many smaller PWM charge controller units are not UL listed

4.Many smaller PWM charge controller units come without fittings for conduit.

5.PWM charge controllers have limited capacity for system growth.


1.MPPT charge controllers offer a potential increase in charging efficiency up to 30 %.

2.These charge controllers also offer the potential ability to have array with higher input voltage than battery bank

3.You can get sizes up to 80 amps .

4.MPPT charge controller warranties are typically longer than PWM units

5.MPPT offer great flexibility for system growth


1.MPPT charge controllers are expensive, sometimes costing twice as much as a PWM controller and are certainly more expensive than PWM controllers.

2.MPPT units are generally larger in physical size.

3.Sizing an appropriate PV array can be challenging without MPPT charge controller manufacturer guides.

4.Using an MPPT controller forces the PV array to be comprised of like photovoltaic modules in like strings. 

Hot Tags: charge controller solar, China, manufacturers, suppliers, factory, wholesale


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