this post was submitted on 10 May 2025
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Solar power station DIY projects? (palaver.p3x.de)
submitted 3 days ago* (last edited 3 days ago) by hendrik@palaver.p3x.de to c/askelectronics@discuss.tchncs.de
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I just found out I can buy a decent 400W solar panel in the local hardware store for around 90€ these days.

Are there people around with experience in off-grid solar? There is quite some supply in cheap MPTT charge controllers on the internet. And I can't afford a 700€ power station. But I would be able to buy a few power tool batteries or one of the lead-acid batteries people put in their caravan. Are there projects building a power station myself? Is this even worth it?

Maybe someone alredy wrote a blog post with recommendations or findings and failures along the way. Or has something similar running at home?

(Thanks to the mods for steering me towards the correct community.)

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[–] czardestructo@lemmy.world 1 points 14 hours ago

Listen to this guy, made a solar powered trailer/workshop and battery storage is the biggest limitation. If you get 3 days of bad weather the battery drains and you go offline. Or you spend tons of money over sizing the system and the batteries are wasted 95% time. Its a game of numbers and use cases.