Renewable energy for Donegal homes and businesses
Efficient Renewables (EHP) designs, installs and maintains solar, heat pumps, ventilation, underfloor heating, EV charging and battery storage. Donegal-based since 2009.
- 4.7 / 5Trustpilot rating
SEAIRegistered installer
Finance IrelandFinance partner- Award-winningPlumbing & Heating 2024
- Since 2009Donegal-based
Two clear paths. Pick the one that fits you.

Solar Panels
Roof & ground-mount solar, including thermodynamic.
Learn more
Battery Storage
Store what you generate, use it after dark.
Learn more
Heat Pumps
Geothermal & air-to-water, Ecoforest-engineered.
Learn more
Underfloor Heating
Low-temperature comfort, new build or retrofit.
Learn more
Ventilation (MVHR)
Fresh, filtered air with heat recovery.
Learn moreEV Chargers
Solar-integrated home charging.
Learn moreHomes across Donegal, running on renewables.
Sixteen years installing solar, heat pumps and more for Irish homeowners. Our customers share what the change has meant for their bills and their comfort.
Grants first. Finance the rest.
From
€157.28/month
We maximise available grants, then spread the balance with flexible finance from our lending partner, Finance Ireland.

Illustration calculated at a 6.7% variable interest rate over 5 years, with a €150 completion fee included in the total repayable. Representative APR is 7.57%. Repayments may change. Terms, rates and approval are subject to lending criteria.
How it works
Every install follows the same clear path, so you always know what happens next, and we handle the grant paperwork along the way.
Enquiry
Tell us about your home or business and what you want to achieve. No pressure, no obligation.
Free home survey
One of our engineers visits to assess the site, take measurements and understand your usage.
Assessment & design
We size the system, design it around your property and handle the SEAI grant paperwork for you.
Installation
Our own engineers install and commission your system, with minimal disruption to your day.
Switch-on & aftercare
We hand over, show you how it works, monitor performance and look after servicing.
Don't leave grant money behind.
SEAI grants for homes, ACA for business and TAMS for farms. We tell you what you qualify for and take it off the price.

Projects from the Northwest and Beyond
Bocan Creche
- System
- Solar PV + Heat Pump
- Size
- 24 kWp
- Sector
- Childcare
- Result
- Award winner

Daly's Circle K
- System
- Commercial Solar
- Size
- 78 kWp
- Sector
- Retail / Forecourt
- Result
- Lower running costs

McMonagle Marble & Granite
- System
- Solar PV
- Size
- TBC
- Sector
- Industry
- Result
- Lower running costs




Visit our showroom in Newtowncunningham.
See live solar, heat pump and ventilation systems running before you buy. Walk in, or book a time that suits.
The things people ask us most.
A few of the top questions across solar, heat pumps and grants. You'll find more on our FAQ page.
The cost depends on your roof, your electricity use and whether you add a battery, so we give you a fixed quote after a free survey rather than a rough guess up front. The SEAI solar grant of up to €1,800 comes straight off the price, and we handle the application for you. Most Donegal homes pair solar with a battery to use more of what they generate.
Yes, we handle the full SEAI application for you from first registration to the final claim, at no extra charge. Grants include up to €1,800 for solar panels and up to €6,500 for a heat pump, with a further €4,000 bonus when you replace an old oil, gas or electric heating system and up to €2,000 towards the related heating upgrades. Your home needs to have been built and occupied before 2021 to qualify, and we confirm exactly what you can claim at the survey.
Yes. Solar panels run on daylight rather than direct sunshine, so they still generate on the grey, overcast days Donegal knows well. Output here is only a few percent below the Irish average, and most homes still cover a large share of their daytime electricity. We size every system on your actual roof and usage, so the figures are realistic before you commit.
Air-to-water heat pumps suit most Donegal homes: they use a single outdoor unit, cost less and install in about a week. Geothermal (ground source) systems draw heat from the ground, so they run a little more efficiently but need trenching or boreholes, which means higher cost and more disruption, and they tend to suit homes with land or high heat demand. Both perform best in a well-insulated home, and we advise which fits yours at the survey.
Solar panels are usually a one to two day job, and an air-to-water heat pump is typically around a week, while a ground source system takes longer because of the groundwork. Counting from your first enquiry through the survey, grant approval and switch-on, most projects run over a few weeks. We keep you posted at every step.
Yes. We are not just installers: we look after your system after switch-on with servicing and aftercare, and our own engineers are on hand if you ever have a question about how it is running. Keeping a system serviced protects both its efficiency and any manufacturer warranty.
Ready when you are
Book your free home assessment and we'll tell you straight what your home needs, what it costs, and what the grants cover.

