Solar Mining: Turn PV Surplus into Bitcoin

Why feeding into the grid is the expensive mistake

Exporting surplus PV in Germany often earns only a low single-digit cent amount per kWh depending on system and commissioning year. The same kilowatt-hour inside a miner produces Bitcoin, and under current network conditions with efficient hardware that value is regularly a multiple higher. That is the entire economic core of solar mining: replacing poorly paid export with higher-value self-consumption.

On top of that, a miner is a perfectly controllable load. It can be throttled or stopped in seconds, needs no inrush current and no flow temperature — more flexible as a surplus consumer than a heat pump, boiler or wallbox.

Sizing the system correctly

As a guide: 1 kWp of PV yields roughly 900–1,100 kWh per year in Germany. A miner at 1.7 kW continuous (e.g. Avalon Q) uses about 40 kWh per day at full load — far more than a small array delivers during daylight. In practice you run the miner on surplus or at part load.

Two designs work well: a small efficient miner running many hours on solar, or a larger unit switched on only around midday. Which is better depends on array size, storage and your consumption profile.

Surplus-based control

Control comes from a smart-meter reading or the inverter interface: the miner is released when surplus is available and throttled when you start drawing from the grid. Braiins OS allows stepped power control instead of pure on/off, which substantially increases usable hours.

Important: miners are most economical running continuously. Frequent cycling costs yield, so with battery storage prefer steady part-load operation over constant switching.

Using waste heat in winter

In winter, when PV yields drop, the maths inverts and the heat matters. A miner converts practically all input power into heat. Using it to warm a room, a workshop or preheat water replaces heating energy and yields Bitcoin as a by-product. This dual use is what makes mining viable at many locations in the first place.

Shipping, warehouse and delivery time

Stocked units ship within 2–4 business days from our warehouse in Bavaria, Germany. Because the hardware is already imported and cleared inside the EU, there is no import VAT, no customs paperwork and no waiting for air freight from Asia. Models sourced directly from the factory show their own delivery time on the product page.

We ship insured to Germany, Austria, Switzerland and the rest of the EU. Orders above 1,000 € ship free within Germany, and express shipping is available for stocked units.

Payment, invoice and warranty

You can pay by bank transfer, credit card, PayPal, Apple Pay or cryptocurrency. Every order comes with a proper invoice showing VAT. EU business customers with a valid VAT ID are invoiced at 0 % under the reverse-charge scheme, and we can switch your session to B2B mode with net prices.

New and used miners are covered by statutory warranty under EU law. Used units are tested, cleaned and shipped with a logged hashrate; the exact scope is stated on each product page.

Advice before you buy

We help you check electricity tariff, power connection, cooling, noise and realistic payback before you order — including when the honest answer is that a machine will not pay off at your kWh price. Send us your electricity cost and the planned location and we will run the numbers with you.