I'm buying some panels soon. I have a couple of very small 20W ones with a small charge/load controller. I use it to run my radio gear, where it charges a lithium pack. I want to upscale next and use some of my lithium battery mountain to run the house power in the evenings through a grid tie inverter, and I've found , interestingly , that a lot of people sell spare/old panels on Facebook Marketplace.  There was an ad last week which I hesitated on, for some almost new 'Trina' brand 260W panels at £90 each, which I missed out on.
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Because they're often installed as a system, and because the technology advanced quickly, when someone's solar array gets damaged in a storm their insurance often recommend rebuilding with all new panels of a higher rating (more modern) and so you can find good quality cheaper panels from an array where only 1 or 2 were damaged for sale by the homeowners who go down that route.
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As for batteries, deep cycle is the only way to go for lead acid. I've noticed a lot of people are selling preassembled lithium packs, called 'power wall' modules. With any lithium battery make sure there is a battery management system involved somewhere. But you can get good deep cycle batteries from computer surplus people who retrofit battery backed UPS systems, at a reasonable price, but those batteries still have a lot of life left in them
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Because they're often installed as a system, and because the technology advanced quickly, when someone's solar array gets damaged in a storm their insurance often recommend rebuilding with all new panels of a higher rating (more modern) and so you can find good quality cheaper panels from an array where only 1 or 2 were damaged for sale by the homeowners who go down that route.
Â
As for batteries, deep cycle is the only way to go for lead acid. I've noticed a lot of people are selling preassembled lithium packs, called 'power wall' modules. With any lithium battery make sure there is a battery management system involved somewhere. But you can get good deep cycle batteries from computer surplus people who retrofit battery backed UPS systems, at a reasonable price, but those batteries still have a lot of life left in them
<p style="text-align:center;">Ohlins, PC3, fuel cut defeat, +4deg timing, 17" front wheel.