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Post by lbrutti on Dec 6, 2020 3:10:29 GMT -8
Hello everyone,
I need to connect multiple solar panels but, unfortunately, there is no time to buy multiple solar panel board...
So I did my self a circuit with diodes in parallel to connect them.
The problem is that the sunairplus board doesn't expose contacts to bypass the JST connector: i only found pads in picture but seems like + JST lead is connected to all of them.
Is there a GND lead i can use to connect my DIY board apart from those exposed as solderless jumpers?
Thanks
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Post by SDL on Dec 6, 2020 10:03:01 GMT -8
You are kind of in luck. The two pads right below the Solar JST connector are the + and - of that connector. No, it is not a bypass, but you can solder to those instead of using the JST connector. This are intended for an optional capacitor on the Solar Panels if you are having stability problems.
BP
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Post by lbrutti on Dec 6, 2020 12:47:19 GMT -8
Thanks for the reply, but why do they all seem to be connected to positive lead of JST connector?
Testing them with multimeter, it beeps when I touch JST+/CAP- and JST+/CAP+...
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Post by SDL on Dec 8, 2020 18:40:24 GMT -8
One side is connected to Ground and the other to Solar + input of the charge chip. I just checked bot a SunAirPlus and a SunAirPlus2 board and both do not show shorts.
What else do you have plugged into the board? Could your external circuitry have a short in it?
Try it with NOTHING plugged in. If it is still shorted, you have a bad board.
BP
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