Best Solar Charge Controller

Best Solar Charge Controller

Product name:PWM solar charge controller 40A
Model No.:NC48- 40D
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.


40 a solar charge controller information

2017 best solar charge controller from soluowill

This intelligent ,multi-purpose solar charge and discharge controller has a very friendly interface of fixed LCD display .Various control parameters can be flexibly set ,fully meet your various application requirements.

Technical Data for NC 40a solar 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

≤ 0.10V

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


Voltage of equalized charging

14.6V(13V~15.5V) ×1/×2/×3/×4

Duration of equalized charging



10.7V(10V~14V) ×1/×2/×3/×4


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

Self-timing switch on/off mode

Light control voltage

5V(1V~10V) ×1/×2/×3/×4

Battery type

GEL, SLD, FLD and USr(default)



LCD, 3 buttons

Heat sink

AL alloy heat sink


PCB terminal, ≤16mm2

Working temperature

-20 ~ +55 °C

Storage temperature

-30 ~ +80 °C

Working humidity

10% ~ 90%, no condensation


196 x 111 x 54 mm

Net Weight


IP grade


Optional function

Remote communication,TTL, standard ModBus protocol


Temperature sensor

Packaging for pwm solar charge regulator

About 40 amp solar charge regulator 

● PWM charging 

● Battery type selectable: Sealed, Gel, and Flooded

● Informative black light LCD display

● Multiple load control modes 

● Energy statistics function

● Full power working at temperature range from -25 to 55 ℃

● Adopt high quality, high reliability components of ST,IR and Infineon 

● UL and VDE certified Nickel plated copper terminals, to ensure safe and solid connection

● Battery temperature compensation function

● Extensive Electronic protection

Application for solar charge controller 

Our Advantage

Our factory

Our market




Q1: 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.

Q2. May I take some samples to test before placing the order ?

A: Yes, but customers need to pay for the sample fees and express fees, and it will be returned when next order is confirmed.

Q3. What’s the price terms can you offer for us?

A: We can accept EXW, FOB, CIF and so on.

Q4. Where is your main market for your products?

A: Most of our products are exported to Southeast Asia, Europe.

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