Can solar power a Bitcoin miner?
Short answer: yes. Small miners like a Bitaxe need only one panel. Big heater-size miners need a whole roof, plus batteries if you want them running at night.
1. The simple math
Every miner draws a steady number of watts. Run it all day and it uses watts × 24 hours of energy. A solar panel makes its rated watts only in full sun, so what it makes in a day depends on how many hours of strong sun you get.
Solar people call that peak sun hours. Across the US it ranges from about 3 to 6.5 a day depending on where you live (see this US sun-hours map). Real systems also lose a bit to dust, wiring and shade. NREL's PVWatts calculator uses 14% losses by default.
So in our example, one 400 W panel with 4 peak sun hours makes about 1.38 kWh a day.
| Miner | Stated power | kWh a day (24/7) | 400 W panels for 24/7* | Price today |
|---|---|---|---|---|
| Bitaxe Gamma | ≈18 W | 0.4 | 1 | from $113 |
| NerdQaxe++ | ≈80 W | 1.9 | 2 | from $211 |
| Avalon Nano 3S | ≈140 W | 3.4 | 3 | from $219 |
| NMQAxe++ Nexus | ≈110 W | 2.6 | 2 | from $399 |
| Hammer Thor P2 | ≈166 W | 4.0 | 3 | from $369 |
| Avalon Mini 3 | ≈800 W | 19.2 | 14 | from $789 |
| Heatbit Maxi | ≈1,500 W | 36.0 | 27 | see shops |
| Avalon Q | ≈1,674 W | 40.2 | 30 | from $1,499 |
*Example only: one 400 W panel × 4 peak sun hours × (1 − 14% losses) ≈ 1.38 kWh a day. Running 24/7 also needs a battery big enough to cover the night, and winter or cloudy days make less. Rounded up to whole panels. Prices are the cheapest in-stock listing we found, before shipping and tax.
2. Small miners: easy
A Bitaxe Gamma draws about 18 W. That's tiny: a single 400 W panel in full sun makes many times more than it needs. Over a whole day it uses about 0.4 kWh, which one panel can cover on a decent day, as long as a battery carries it through the night.
That makes a Bitaxe a fun first solar project: a panel, a small battery or power station, and a USB-C or 5 V supply. It's a solo lottery ticket powered by the sun. Check the solo odds.
3. Big miners: a roof's worth
Heater-size miners draw hundreds of watts or more, so running one 24/7 takes many panels and a large battery. Most home solar owners with a big miner run it in the daytime only, when the panels make more than the house uses, instead of sending that power back to the grid for a low buy-back rate.
In winter the sun is weaker but you need heat anyway, so a heater miner can still make sense on grid power. How heater miners work · Room heat calculator.
4. Daytime only or 24/7?
- Daytime only: no battery, cheapest setup. The miner runs fewer hours, so it earns less and gets fewer solo chances.
- 24/7 with a battery: more hours mining, but batteries cost money and lose some energy charging and discharging.
- Grid-tied panels: if you already have solar on the roof, the real question is what your spare power is worth. Compare it with the break-even power price on each miner page.
Questions
Can a solar panel run a Bitaxe?
Yes. A Bitaxe-class miner draws around 15 to 25 W, so one normal home panel makes more than enough in daylight. For night-time mining you need a battery and a charge controller or a small power station.
Can I mine only when the sun is out?
Yes. A miner can be switched on and off, so daytime-only mining with no battery works. It just mines fewer hours, so it earns less and has lower solo odds than running 24/7.
Is solar mining free?
Not quite. The panels and batteries cost money, and power you'd otherwise use in your home or sell back to the grid has value. Solar makes the most sense with spare power you can't use or sell for much.
How many panels does a big home miner need?
Roughly the miner's watts × 24 hours, divided by what one panel makes in a day. With our example of about 1.38 kWh per 400 W panel a day, a 500 W miner needs about 9 panels plus a battery to run around the clock.
Keep reading
Not financial advice. These are rough examples; a solar installer or NREL's PVWatts calculator can estimate your own roof. Earnings aren't guaranteed.