14-03-2019, 04:03
Hi all
Attached are some pictures of my Lithium Ion power solution for my WeatherDuino station. The batteries are 2400mAh 18650's in a 3s5p solution, giving me 12.6v and 10Ah. The solar panel is currently 50W but I may down size that to 25 or so if the batteries are working well.
The solar charger is designed for Li-ion batteries (and others of course) but all the voltages for charge, low voltage cut-off and restore are configureable over a wide range. Not bad for a $12USD unit! It is only PWM but I will keep an eye out for an MPPT controller at some stage in the future.
I still need to do some work on the mounting in the box, it's a bit cramped. A job for another day
Cheers from NZ
Colin
Attached are some pictures of my Lithium Ion power solution for my WeatherDuino station. The batteries are 2400mAh 18650's in a 3s5p solution, giving me 12.6v and 10Ah. The solar panel is currently 50W but I may down size that to 25 or so if the batteries are working well.
The solar charger is designed for Li-ion batteries (and others of course) but all the voltages for charge, low voltage cut-off and restore are configureable over a wide range. Not bad for a $12USD unit! It is only PWM but I will keep an eye out for an MPPT controller at some stage in the future.
I still need to do some work on the mounting in the box, it's a bit cramped. A job for another day
Cheers from NZ
Colin
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