Well you might be lucky with the pepper plants if theyve not had frost on them,
I've kept chillies indoors for a few years they never last though spider mitr seem to take there course and I don't like to spray, If you do make a solar irrigation pls share very interested to know how you get on I've used solar to power a pool but that was a bought in pumb and solar panel.
What's the yellow Tom called?
Edit I use King's seeds wholesale.
I grow loads of chilies indoors. I have grown chilies for about 15 years, and have combated just about every kind of pest,
I dont like to use anything "chemical" on my plants.
Despite spider mites having a feerce reputation, I have never found them to be too problematic. If left untreated the mites replicate quickly and will eventually overwhelm chilly/pepper plants reducing them to a mess. I have tried various ways to rid plants of spider mites over the years. The most effective way I have found to combat SM is simply to spray the plants down with water.
My plants are all in pots, so I just take the plant outside, then hose it down with the hose nozzle attachment in the highest power spray setting. Make sure you get the underside of the leaves too. All spider mites hate damp, so its not just the action of spraying them off, the dampening of their environment helps too. So I will normally spray infected plants outside once per day, then just dampen the plant 1 or 2 times more throughout the day.
There is more than one kind of spider mite. There is one type this treatment will clear up in a single hit. But unfortunately there are some more stubborn ones that will require ongoing treatment. Most will be wiped out in about a week if you treat 2/3 times a day. But there is a relay stubborn kind (its the relay small ones) that this treatment will not completely kill, and you will have to keep treating every 5/7 days to control them.
The key too spider mite prevention is early treatment. The more established they are on the plant, the harder it will be to remove them. So inspecting plants regularly is critical.
My worse enemy for years was the western flower thrip and their associated plant viruses. I thought I had finaly cracked the thrip problem, then last year I had a new kind of thrip show up that were identified as Chilly thrips. So Chilly thrips are the bane of my chillys now and I am just hoping they dont show up again this year.