Alright, so, I’ve talked solar before. A lot. But then I saw this thing in El Español—some wind turbine claiming 700Wh output.
And I thought, huh. Could this actually work for off-grid homes? You know, when the sun just disappears on you for days?
Anyway. 700Wh, they say. Sounds good on paper. But we all know “paper” and “real life” don’t always match. So let’s break it down. Say you’ve got a 12V lithium battery, 100Ah. That’s, what, 1,200Wh? In perfect wind conditions (lol) this turbine could charge it in 1.7 hours. But c’mon. Wind isn’t some obedient little worker—it’s all over the place. Real-world? Probably a whole lot slower.
Now, picture it.
Middle of the night. No sun. Just you, your battery, and whatever juice it’s got left.
Fully charged, that 100Ah battery gives you 1,200Wh. So you could run a 100W laptop for 12 hours. Or keep your fridge humming (50W) for a full day. Or blast the microwave for an hour (hope it’s worth it). LED lights? You could live in a glowstick rave for ages.
So yeah, wind could help keep batteries topped up when solar dips. But here’s the thing: that article mentioned turbines under €135. Sounds great, right?
Buuut.
Serious wind turbines—like the ones from BORNAY—start around €6,000 for a 3kW model. Wanna go big? 5kW? Try €9,000+. You might as well just buy more solar. One guy in a solar Facebook group put it best: “BORNAY actually works. The cheap ones? Might as well blow on your battery yourself.”
So yeah, those Amazon “budget” turbines…The €200 specials? Yeah, they’re out there. But are they good?
Eh. One user said their 600W-rated turbine was capped at 20Ah per hour. That’s 240Wh at 12V. Which, sure, sounds okay. But wind is sketchy. So, in reality? Not reliable.
Then there’s the whole power conversion mess. Wind turbines spit out AC. Batteries drink up DC. So unless you’ve got a charge controller doing its thing, you’re just… throwing power into the void. High-end models got MPPT controllers to keep things efficient. Cheap ones? Yeah, they’ll waste power. Or worse—kill your battery.
Honestly? I really wanted this to work. A cheap, little wind turbine riding shotgun with solar? That’d be sick. But reality’s a buzzkill. These small turbines? Not there yet. They’re like a backup singer at best. Definitely not headlining.
Maybe down the road, the tech will catch up. But right now? I’m sticking with solar. What about you? Anybody actually made wind work off-grid? Spill the details!