Solar Controller

bluefox0919

Solar Controller [Copy link]

I bought a set of solar panels and a matching controller with a 12V battery online. The solar panel is marked with 10W, 18V, and 0.56AH. In actual testing, it only got about 6.9V... I asked the store and they said that it was uniformly marked with 18V, but there were actually three specifications sold with 6V specifications, and they asked me to buy a 6V battery again. After purchasing, I found that the operating voltage of the controller was 12V, and then the manufacturer disappeared... Now I can only choose to test it, 1. Boost the solar panel to more than 13V, 2. Boost the 6V battery output to 12V, and then find a way to charge it with solar energy. 3. Disassemble the circuit to find the ADC part of the circuit to change the voltage divider resistor, but I am afraid that the battery will not boost the voltage, and then the battery will not be able to push the controller's voltage stabilization circuit. I don't have enough experience, I would like to ask: Can the solar panel be increased from 6V to 13V or above, and the current loss is not too large? Or is there an IC that can increase 6V to 12V, and the power consumption is not too large? Or is there any other solution, thank you

maychang

Three solar panels connected in series can generate 18V voltage.

maychang

Three solar panels connected in series can get a voltage of 18 V. However, "then the manufacturer disappeared", which is not easy to deal with.

bluefox0919

maychang posted on 2018-7-27 16:03 Connecting three solar panels in series can produce 18V voltage.

Currently, only one solar panel can be used, mainly because the size is limited by the organization and it cannot be increased. That's why I am happy to buy an 18V panel...

maychang

bluefox0919 posted on 2018-7-27 16:06 Currently, only one solar panel can be used, mainly because the size is limited by the organization and it cannot be increased. That's why I am happy to buy an 18V one...

There are many 6V input boost chips on the official website of Texas Instruments. Just type in your requirements and you can select the chip model.

liweigang20

If the purpose is just to learn, you can consider the boost solution. If you are making products, then change to 18V solar panels, which are more reliable than the boost circuit. 18v solar panels have a regular output voltage, should not be difficult to find, and the price is not high.