Don't bother
Solar panels take up space that would be better for letting in sunlight. Water in the morning or evening, but don't water the leaves, just the soil around the base, as wet leaves can scorch
( Smash Monkey 2 Prozac is apparently good for menopause, Tue 9 May 2023, 16:09, archived)

He wants an automated watering system I think

( mofaha ┐( ˘_˘)┌ ʅ(́◡◝)ʃ, Tue 9 May 2023, 16:12, archived)

I do
Like a little pump drip system
( mr horrible up yours, dickface, Tue 9 May 2023, 17:08, archived)

I tried a few things with my greenhouse
Water butt with submersible pump connected to a smart socket, tray watering with little float shutoff valves and a more ambitious project to link arduino soil moisture sensors to electrically operated water valves that I never got round to finishing
( 2 Can Chunder Word to your mums, I came to prod bums, Tue 9 May 2023, 17:13, archived)

This is the sort of thing I'm getting at
But I think a little trickle feed solar panel with a storage battery for the pump/droppers and a small heating element to stop it getting totally freezing in winter.
( mr horrible up yours, dickface, Tue 9 May 2023, 17:33, archived)

I already have an overall temp/humidity sensor in the greenhouse, so I can get all smart with routines from that

( mr horrible up yours, dickface, Tue 9 May 2023, 17:34, archived)

Fair enough. My greenhouse was close enough to the house to make it easier just to run everything off the mains.
Plus my greenhouse heater was a bitcoin mining ASIC in a home made water resistant server enclosure so solar panels wouldn't really have cut it.
( 2 Can Chunder Word to your mums, I came to prod bums, Tue 9 May 2023, 23:07, archived)

Did you find any coins? or whatever the verb is.

( mofaha ┐( ˘_˘)┌ ʅ(́◡◝)ʃ, Wed 10 May 2023, 2:24, archived)

I mined 3 bitcoins but the FBI confiscated them when they shut down BTC-E :(

( 2 Can Chunder Word to your mums, I came to prod bums, Wed 10 May 2023, 9:55, archived)

ter nk
( Mr. Tea 'ulmmm'/'mmneurgh', Tue 9 May 2023, 17:37, archived)