Solar panel for shed

jogdish

Hi,
I am looking to buy a small and cheapish solar panel for a shed to power some 12v LED lights, and that's pretty much it, maybe a 12v water pump to help water plants if things go well.


I am looking at panels on amazon and they are 5w/10w/.. all 12v, how likely am I to get the 12v needed to charge a 12v battery on a typical Irish day. Or am I only likely to see 12v coming on a great summers day?


https://www.amazon.co.uk/Photonic-Universe-controller-battery-motorhome/dp/B009FP2R2K/ref=pd_sbs_107_1/257-6009270-6827711?_encoding=UTF8&pd_rd_i=B009FP2R2K&pd_rd_r=1ab91717-4980-11e9-b69e-bd6f2b4d54b3&pd_rd_w=Et4W7&pd_rd_wg=FkGNG&pf_rd_p=18edf98b-139a-41ee-bb40-d725dd59d1d3&pf_rd_r=J88S2JA3TXZK1TCDC695&psc=1&refRID=J88S2JA3TXZK1TCDC695

reklamos

I know this is old.
10W panel is not going to cut it or charge the battery especially for water pump
I have 2x 12V panels 140W total with MPPT charger, 115Ah leisure battery in my shed. I use this setup for leds(when needed) and also to drive 2x 12V airpumps(total 50W) for 14hours(20 mins every hour). Also I run time to time I run 12V submersible pump for watering pants. Setup runs well in Irish weather and the battery never got drained in over 3 years. Initially I had 60W panel only with a single airpump and this one was struggling to keep up.

unkel

jogdish wrote: »

how likely am I to get the 12v needed to charge a 12v battery on a typical Irish day. Or am I only likely to see 12v coming on a great summers day?

You will see well over 12V all the time during daylight hours. A 12V panel typically shows about 15-20V. The power output of course depends completely on the solar irradiance. Only in full sunshine blue skies will you get the rated 10W power from that panel.