Manual for Cheap Chinese PWM charge controller

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New Member
I'd like to construct a solar system to power a very small remotely located LED lighted property/house number. I'd like to use one of the cheap Chinese PWM charge controllers, but the manual that is included with these PWM's is vague and usually poorly written in Chinglish.

Is there a manual or a document that provides explanations of the capabilities and functions of these cheap Chinese PWM charge controllers written in understandable English?
 

agt

Solar dabbler
I'd like to use one of the cheap Chinese PWM charge controllers
Do you have a specific model in mind? I’ve been happy with a 10A “SL-03” from Wincong (they OEM to a number of resellers, but also sell direct). Better than decent manual.
 

rin67630

Solar Enthusiast
For very small applications like yours Wincong also makes the tiny SX01 that is targeted at exactly that + solar powered advertising / traffic signs.
It is extremely versatile, damn cheap and handles all types of batteries from lead-acid to Lipo at various voltages.
OK the manual requires a bit of patience, for instance you must notice that the option "Load on all the time" is 6. (six plus dot).
 

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New Member
Attached are photos of the PWM charge controller I currently have and the instructions which were included with it.

I'd like to know more about the functions it will perform and the procedure to "set each function".

I have determined how to adjust several of the parameters, but there are a couple that I'm not sure I understand what would be the correct value for the parameter. Also would like to know if the values "set" for each of the parameters will remain if the charge controller loses power or if the values will need to be "re-set".
 

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New Member
The small solar panel I would like to use is 12V 10 watts, however, the LED's I will use are 24V. I propose to use the 12V solar panel to charge 2 - 12V batteries which will be connected in series to power the 24V LED's. The charge controller is 12V/24V and also has the ability to function as a photocell to turn the LED's on from "dusk to dawn".

However, I'm not sure about the circuitry and if/how the charge controller will function in regard to the following:

1. 12V to charge the batteries
2. 24V to power the LED's
3. Controlling power to the LED's from dusk until dawn

There are 2 possible scenarios, however, I'm not sure scenario 2 will work as I do not understand the capabilities of a charge controller in this configuration.

1. Solar panel to the charge controller which charges the 12V batteries. The batteries are connected in series to provide 24V power to the LED's. The charge controller is "set" to provide power continuously and a photocell/photo diode is used to control "dusk to dawn" power to the LED's.

2. Solar panel to the charge controller which charges the 12V batteries. The batteries are connected in series for 24V. The LED's are connected to the "load" side of the charge controller which provides dusk to dawn poser to the LED's.
 

rin67630

Solar Enthusiast
Attached are photos of the PWM charge controller I currently have and the instructions which were included with it.

I'd like to know more about the functions it will perform and the procedure to "set each function".

I have determined how to adjust several of the parameters, but there are a couple that I'm not sure I understand what would be the correct value for the parameter. Also would like to know if the values "set" for each of the parameters will remain if the charge controller loses power or if the values will need to be "re-set".
OK i know that cheapo controler: It is pretty straight forward to use and -of course stores- the settings in EEPROM so you don't need to re-enter the settings each time you repower the device.

Use a single 12V battery. Feed the lights from the light output of the controller. Look at your favourite Chinese supplier for buck-converters to get 24V out of 12v. Better, replace the LED driver with a 12V model or look for an upvolting buck converter that has a current limiter and feed directly the leds directly at the requested current. You will, as a bonus, be able the trim the current to lower values and save power.
 
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