Sealminer A4 Ultra Hydro
Bitcoin & Bitcoin Cash ASIC Miner
886TH
HASHRATE
9.45W/TH
EFFICIENCY
8373W
POWER
£862.14
EST. MONTHLY
NO PAYBACK
EST. ROI
Image: Terahash · Original source.
Renewables and heat reuse
Terahash says its Genesis site went live on 31 October 2024. The 1 MW installation supplies heat to a district network serving industrial and residential demand, with electricity described by the operator as renewable.
- Project at a glance
- 1 MW mining site · district heating
- Source date and context
- Commissioned 31 October 2024, according to operator
- Published financial detail
- The sources reviewed do not include full project accounts.
- Our comparison
- A UK example per 1,000 miner kWh
About 5 minutes to read
A mining site built around an existing heat network
Terahash says its 1 MW Genesis site went live in Finland on 31 October 2024. Its commissioning account describes a district heating connection serving industrial demand and some household heating, with renewable electricity supplying the miners. Having a nearby network gives the heat an identified destination. The published account does not include a complete annual heat balance or project cash flow.
“This achievement was only possible through close collaboration with our Finnish partners”
A nearby industrial customer can use heat through the year
Renewable electricity→liquid-cooled Bitcoin mining→district heat
The network's acceptance profile will determine how much output earns income. Industrial demand may extend beyond the winter heating season, but the heat still needs to meet the agreed temperature and availability requirements. Connection costs, outages and periods when output is rejected belong in the same assessment as the electricity tariff and mining equipment.
What the numbers could look like in the UK
The calculation below uses assumed UK prices to show how the costs fit together. It is our example, not this project’s reported earnings. Replace the inputs with current machine estimates and the costs at your own site.
Illustrative UK calculation
Income and running costs
1,000 kWh used by miners, plus 50 kWh for pumps and fans. All amounts in pounds.
Operating contributionBefore equipment and installation costs
−£9.60−0.96p per miner kWh
This example buys electricity at 12p/kWh and values useful heat at 6p/kWh. These are assumed prices. The heat value should be replaced with the actual cost of the heating you would otherwise use, or the price a customer agrees to pay.
| Mining income | 8p per miner kWh; an assumed rate, not a live earnings estimate |
|---|---|
| Electricity | 12p/kWh × 1,050 kWh = £126.00 |
| Pool fee | 2% of gross mining income |
| Useful heat | 80% of miner electricity = 800 kWh; valued at 6p per delivered kWh |
| Other running costs | £10 per 1,000 miner kWh; an allowance to replace with your own costs |
| Costs still to add | Equipment, installation, finance, tax, depreciation, major replacements and any costs above the allowance |
The contribution is what remains from mining income and useful heat after the stated running costs. It is not net profit: the equipment and other excluded costs still have to be recovered. Pumps and fans use electricity but earn no mining income in this calculation.
| Gross income per miner kWh | Without heat value | With useful heat |
|---|---|---|
| 5p | −£87.00 | −£39.00 |
| 8p Chart example | −£57.60 | −£9.60 |
| 11p | −£28.20 | £19.80 |
- Mining income needed to cover running costs
- 8.98pper miner kWh
- Highest electricity cost or export value supported
- 11.09pper total electricity kWh
These are two ways to read the same example. Adding equipment costs or a larger maintenance allowance raises the income needed and reduces the electricity price the project can afford.
Compare heating options and work out annual costs
Use the heating system you would actually choose as the comparison. For example, a heat pump using electricity at 20p/kWh with a seasonal COP of 3 has an electricity cost of about 6.67p per kWh of heat. A resistance heater at that tariff uses 20p per kWh of heat. These are calculation examples, rather than measurements from this project.
For an annual estimate, use the miner electricity expected during hours when running makes sense. Scale the contribution by annual miner kWh divided by 1,000, then deduct fixed annual costs. Recalculate if electricity prices, mining income or usable heat change.
Simple payback is the total installed cost divided by positive annual cash contribution. There is no payback under a scenario with zero or negative contribution. The sources reviewed here do not provide the full project accounts needed to calculate an actual payback for this installation.
Read the heat contract alongside the power contract
A nearby heat buyer can be as important to site selection as a competitive electricity contract.
Request an annual heat acceptance curve, electrical and thermal meter records and the terms of the heat contract. Check how outages and rejected heat are allocated.
Questions worth asking
- Does the network buy all available output?
- What happens to the heat price or hosting terms when computing revenue falls?
Try your own electricity and heat figures
Compare available miners and dated earnings estimates. Include heat only where you can use it or have a customer for it.
Sources and photographs
Sources checked on 29 September 2026. Project facts and quotations come from the publications below; the UK calculations and practical assessment are The Mining Shop’s analysis. This article is based on published material, rather than a site visit.
Photographs: Terahash (source).
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