Hydropower systems use flowing water to generate electricity. Water passing through a turbine turns a generator which creates usable power for a home, farm or larger site.

Hydropower is most suitable where a property has:

  • A river, burn, stream or watercourse nearby
  • Reliable year-round water flow
  • Suitable land gradient or water drop (known as "head")
  • Space for pipes, turbines and equipment

Unlike solar and wind, hydro systems can often generate electricity continuously, day and night where water flow remains consistent.

What Can Hydropower Power?

Electricity generated can help supply:

  • Household electricity use
  • Farms and agricultural buildings
  • Workshops and businesses
  • Battery storage systems
  • Heat pumps and heating systems
  • Exporting excess electricity back into the network

Typical Domestic Hydropower Output

Output depends on:

  • Water flow volume
  • Vertical drop (head)
  • Pipe size
  • Turbine type
  • Seasonal water levels

Typical examples:

Small Domestic System – 1kW

Approximate annual generation:

  • 4,000–8,000 kWh per year

Can meet much or all of typical household electricity demand.

Medium System – 5kW

Approximate annual generation:

  • 20,000–40,000+ kWh annually

Can support larger homes, farms and export income.

Larger Farm Hydro Systems – 25kW+

Approximate generation:

  • 100,000+ kWh annually

May support farms, estates and commercial sites.

Hydro often produces more consistently than wind or solar because water can flow continuously.

Are Grants Available?

Hydro grants are more limited than insulation or heating grants, but support still exists in some areas.

Scotland – Home Energy Scotland (HES)

Funding can include support through grants and interest-free loans for renewable technologies. Current funding includes:

  • Up to £2,500 interest-free loan support for hydro turbines

Home Energy Scotland

Phone: 0808 808 2282

Support advisers can discuss:

  • Property suitability
  • Renewable options
  • Funding guidance
  • Hydro assessment routes

Scotland – CARES

Community renewable projects and shared ownership schemes may receive support through CARES.

Support can include:

  • Feasibility studies
  • Community project development
  • Shared renewable projects
  • Community energy funding routes

Local Energy Scotland

Phone: 0808 808 2288

Step By Step – Who Should Someone Contact?

Step 1 – Contact Home Energy Scotland

This is often the best first step for domestic and farm-scale projects.

Discuss:

  • Whether your stream or river may be suitable
  • Funding options
  • Hydro system guidance
  • Renewable support available

Phone: 0808 808 2282

Step 2 – Contact SEPA Or Environmental Authorities

Hydropower often requires environmental permissions.

Checks may include:

  • Water abstraction rules
  • River ecology
  • Fish migration issues
  • Environmental impact requirements

Step 3 – Contact The Local Distribution Network Operator (DNO)

If electricity will be exported:

The local network operator checks:

  • Grid capacity
  • Export capability
  • Upgrade requirements
  • Connection costs

Step 4 – Arrange Hydro Feasibility Surveys

Specialist hydro consultants normally assess:

  • Water flow
  • Head height
  • Annual generation estimates
  • Construction costs
  • Financial viability

Step 5 – Planning & Installation

Larger schemes can require:

  • Planning permission
  • Civil engineering works
  • Pipe installation
  • Turbine house construction
  • Electrical connections

Can You Get Paid For Exporting Electricity?

Yes.

Eligible systems can sometimes receive payments under export arrangements.

Typical requirements can include:

  • Smart meter or export meter
  • Certified installation
  • Grid approval
  • Supplier export agreement

Payment levels vary and can change over time.

Additional Information

  • Hydro systems can run day and night
  • Works best with reliable water flow
  • Rivers and streams often need environmental approval
  • Grid checks should happen early
  • Larger systems can generate significant long-term savings and income

Need Information On Current Grants & Support?

Contact Grants Gateway to discuss hydropower grants and renewable support routes that may apply to your property or land circumstances.

Available support and eligibility requirements can vary depending on location and individual circumstances.