Having mine for a year, got 380 kWh in 2024. Happy :)
Even if non-optimal, it's still an amount of energy capture that isn't otherwise happening.
Easy to install - just plug into your power plug - low costs - starting at around 300€ - and return on invest in 1-2 years. That‘s a quick win.
However, you should have more recent power cables installed in the wall, not old ones from the 60ies. Or put differently, if your cables in the wall get warm when your hair dryer runs for half a hour - don’t do it.
The article says they cost 400-800 Euro and the poster at the top says they generated 380kWh which is about 100 Euro's worth so seems more like 4-8 years. Still likely worthwhile of you can get that and they last significantly longer than 10 years, but not a no brainer everyone should buy.
It depends so much on panel kwp, inverter wattage, orientation, your steady power need, and of course your power tariff.
Best is you take an online calculator https://www.ertragsrechner.com/rechner/balkonkraftwerk
Does the wiring actually matter? The max output for the solar should be drastically less than the pull from a hair dryer. Normally the hair dryers less than 7 amps at 240v, but the solar should be half that at most right?
You‘re right. It’s actually a poor example. In Germany it’s reduced to 600 and 800W or 2,5 and 3,33A.
However, the constant current might be an issue for old and thin cables. Working as a resistor and heats up.
That's a good point, this would have a couple amps going through it all day
Posts from the RSS Feed of HackerNews.
The feed sometimes contains ads and posts that have been removed by the mod team at HN.