Checkout my solar powered air gradient with 12v battery supply.
Wireless from my house reaches out to the yard.
https://aetrius.dev/2024/03/04/solar-battery-powered-air-gradient-air-quality-monitoring/
5 Likes
Looks good! The voltmeter is a nice touch.
1 Like
Awesome. Thanks for sharing. We do also have a few AirGradient Open Airs running on solar cells. How many Watts does your panel have and are you sometimes running out of juice?
I’ve only been running this thing for about 12 hours as of this post. I cant remember what the battery started at for it’s initial voltage. I’ll have to watch it charge up to validate.
Est 20% or less used in 12 hours, it dropped about 1 volt for sure, maybe 2.
Assuming I started with a fully charged battery at 12.6V and it’s now at 12.5V, I’ve used approximately 1/12 of the total capacity, which is about 8.33% of the battery’s capacity.
or
if it’s 12.7 V - 1.57% per hour or .79% per hour
This is based on having no solar input as the sun was setting / blocked on the panel through the night.
https://www.amazon.com/dp/B08GX19KT9?ref=ppx_yo2ov_dt_b_product_details&th=1
20W 12V Solar Panel with charge controller
Status update: it’s been fully running through over a month with no issues.
5 Likes
That is great to hear. Thank you very much for sharing. I might have to try to get mine up and running on solar.