Sealminer A4 Ultra Hydro
Bitcoin & Bitcoin Cash ASIC Miner
886TH
HASHRATE
9.45W/TH
EFFICIENCY
8373W
POWER
£884.77
EST. MONTHLY
NO PAYBACK
EST. ROI
Image: Green Bitcoin Farm · Original source. Developer photography; the proposal’s operating performance is not independently established.
Renewables and heat reuse
Green Bitcoin Farm describes a developing finca concept linking solar and wind electricity, Bitcoin mining, and drying of moringa, herbs, fruit or spirulina with recovered heat.
- Project at a glance
- Agri-PV + produce drying concept
- Source date and context
- Project page reviewed September 2026
- 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 finca concept being developed in Tenerife
Green Bitcoin Farm describes plans to combine agriculture, solar and wind generation, mining and drying in Tenerife. Proposed heat uses include moringa, herbs, fruit and spirulina. The site presents a developing concept rather than verified commercial production. Its appeal lies in putting several activities close together, but each still needs a working process and a customer.
“Surplus electricity can power Bitcoin miners.”
Harvest timing matters for heat reuse
Agri-PV and proposed wind→mining→crop-drying heat
A dryer needs heat when produce is ready, which may not coincide with the largest electricity surplus. Temperature, hygiene, airflow and final moisture also differ between products. A small drying trial would give a farmer more useful information than assuming that every kWh of mining heat has a buyer. Solar output and the farm's own water and equipment loads need measuring too.
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
£51.905.19p per miner kWh
Here, using the electricity for mining gives up a 5p/kWh export payment. That cost includes the 50 kWh used by pumps and fans. It is the value of an alternative sale, so it is not also charged as a grid electricity bill. The example assumes the generation equipment already exists.
| Mining income | 8p per miner kWh; an assumed rate, not a live earnings estimate |
|---|---|
| Electricity | 5p/kWh × 1,050 kWh = £52.50 |
| Pool fee | 2% of gross mining income |
| Useful heat | 60% of miner electricity = 600 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 | −£13.50 | £22.50 |
| 8p Chart example | £15.90 | £51.90 |
| 11p | £45.30 | £81.30 |
- Mining income needed to cover running costs
- 2.70pper miner kWh
- Highest electricity cost or export value supported
- 9.94pper 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.
Prove each part of the farm before adding the returns
Crop-safe temperature, humidity and hygiene need validation for each product.
Separate commissioned assets from planned additions. Collect local generation data, drying trials, crop yields and an itemised capital budget before projecting combined returns.
Questions worth asking
- Which elements are operating today?
- Can the chosen crop absorb heat during the hours when solar surplus is available?
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: Green Bitcoin Farm (source).
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