Solar Controller

Solar Controller

Product name:PWM solar charge controller 20A
Model No.:NC 12/24- 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 controller information 

China 20A LCD Digital Display Adjustable Setting PWM Low Price Solar Charge Controller

The controller is a new series of intelligent, multi-purpose solar charge controllers. Its innovative structured design makes it easy to install and more reliable to use. Optimized charging and discharging management enables the service life of batteries to be greatly boosted. Meanwhile, more system symbols can be displayed in bigger LCD interface. Vivid symbols can show the working status of the system and relevant parameters can be fully displayed. What's more, intelligent control of LED backlight makes it possible to see all symbols and parameters clearly even in the dim light conditions. Various control parameters can be flexibly set to fully meet your various application requirements.

Technical Data for NC 20a solar controller



Technical Data for NC 20a solar controller

Packaging for pwm solar controller

About 20 amps pwm solar controller

1. Simple visible LCD display shows live parameters of power system, monitor and check system status.

2. All the controlling parameters can be reset flexibly to satisfy your different needs.

3. 12V 24V auto switch, and automatically break off when the battery is not sufficient to power loads, make sure battery will not drain off.

4. Integrated multiple protection against overcharge, over discharge, over load, short circuit and reverse polarity, safely protect your battery.

5. Temperature compensation function, the controller can automatically adjust the charge parameters of battery by environment temperature to prolong the service life of battery.

Application for solar charge controller 

MPPT solar power controller, high beam and luminous power less than 10ma, suitable for small solar products, such as solar street lights, street lights, DC loads, solar power systems.

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Q1:What is a Solar Charge Controller? Why do I need one?

A charge controller, or charge regulator is basically a voltage and/or current regulator to keep batteries from overcharging. It regulates the voltage and current coming from the solar panels going to the battery. Most "12 volt" panels put out about 16 to 20 volts, so if there is no regulation the batteries will be damaged from overcharging. Most batteries need around 14 to 14.5 volts to get fully charged.

Q2:Do I always need a charge controller?

Not always, but usually. Generally, there is no need for a charge controller with the small maintenance, or trickle charge panels, such as the 1 to 5 watt panels. A rough rule is that if the panel puts out about 2 watts or less for each 50 battery amp-hours, then you don't need one.

Q3: Why 12 Volt Solar Panels are 17 Volts?

The obvious question then comes up - "why aren't panels just made to put out 12 volts". The reason is that if you do that, the panels will provide power only when cool, under perfect conditions, and full sun. This is not something you can count on in most places. The panels need to provide some extra voltage so that when the sun is low in the sky, or you have heavy haze, cloud cover, or high temperatures*, you still get some output from the panel. A fully charged "12 volt" battery is around 12.7 volts at rest (around 13.6 to 14.4 under charge), so the panel has to put out at least that much under worst case conditions.

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