60-80%
Lower heating cost
Heat with solar – save 60-80 % on heating from day 1
Combine a heat pump with solar panels and let the sun power your heating. EcoRay designs the optimal solution for your home.
Based on data from 500+ Danish installations
Heat pump + solar in synergy
Intelligent control via iHEMS
Up to 80% lower heating cost
COP 3-5
Heat pump efficiency
25+ yrs
System lifespan
Typical savings
60-80%
On annual heating bill
Payback period
4-7 yrs
With solar synergy
COP value
3.0-4.5
Energy out per energy in
CO₂ reduction
70%+
Vs. oil/gas boiler
Why combine?
Solar + heat pump = the strongest combination
When solar panels produce free electricity and the heat pump uses it to heat your home, you get a synergy effect that beats every other solution.
Solar panels produce free electricity
Your solar panels convert sunlight into electricity – power you would otherwise buy from the grid at high spot prices.
The heat pump multiplies energy
For every 1 kWh of electricity, the heat pump delivers 3-5 kWh of heat. It’s like getting 3-5x value from your solar power.
The synergy effect
Together they reduce your heating bill by 60-80%. No other single solution can match this combination.
In short
“1 kWh of solar power becomes 3-5 kWh of heat. That’s why the combination is so powerful.”
Actual savings depend on home insulation, consumption, and system sizing.
How it works
From sun to heat – step by step
Follow the energy’s path from the solar panels on your roof to the warmth in your radiators.
Solar panels
Inverter
Smart control
Heat pump
Your home
Solar panels
Produce electricity
Inverter
Converts power
Smart control
Optimizes usage
Heat pump
COP 3-5x
Your home
Heat & comfort
Solar energy
Heat pump
Smart control
Grid (backup)
Smart control ensures the heat pump primarily runs when solar panels produce – or when electricity prices are lowest.
Calculate your savings
Adjust the parameters and see what you can save with a heat pump and solar panels.
Settings
Before (current)
18.000 kr. / year
After (estimated)
6.326 kr. / year
Annual savings
11.674 kr. / year
≈ 973 kr. / mo.
Reduction: 65%
Estimates are indicative and based on average Danish conditions. Actual savings depend on insulation, location, and consumption.
Visualized savings
Before and after – see the difference
Compare your heating consumption month by month, before and after installing a heat pump + solar panels.
Monthly heating cost (DKK)
Daily energy profile (kWh)
Winter savings
45-65%
Oct–Mar
Summer savings
80-95%
Apr–Sep
Annual average
60-80%
Full year
In summer, solar panels cover almost all of the heat pump’s consumption. In winter, the grid supplements.
Intelligent control
Smart control maximizes your savings
EcoRay’s intelligent control automatically optimizes when the heat pump runs – based on solar production, electricity prices, and weather forecasts.
Solar-prioritized operation
The heat pump automatically runs at full power when solar panels produce the most.
Up to 15% extra savings
Electricity price optimization
The system pre-heats your home when electricity is cheap and reduces operation when prices are high.
Based on Nordpool spot prices
Weather forecast integration
Uses 48-hour weather data to predict solar production and heating needs.
Predictive optimization
App control
Monitor and adjust your system from your smartphone. See real-time data and savings.
Full control, always
Automatic balancing
Intelligently distributes energy between heat pump, household, and optional battery.
Maximum self-consumption rate
Monthly reports
Get detailed reports on production, consumption, and savings every month.
Full transparency
EcoRay Smart Energy Controller
Our intelligent controller connects solar panels, heat pump, and EV charger in one unified system. The result: up to 15% extra savings beyond the heat pump installation itself.
Real examples
What do Danish families save?
See concrete savings examples from Danish households with heat pumps and solar panels.
Apartment / townhouse
90 m², gas boiler, 2 people
Heat pumpAir/air
Solar system4 kWp
Before (heat/yr)14.000 kr.
After (heat/yr)4.200 kr.
Savings/yr9.800 kr.
Estimate based on average Danish gas consumption
Typical detached house
Typical150 m², oil boiler, 4 people
Heat pumpAir/water
Solar system8 kWp
Before (heat/yr)22.000 kr.
After (heat/yr)5.500 kr.
Savings/yr16.500 kr.
Incl. smart control and price optimization
Large detached house
250 m², older gas boiler, 5 people
Heat pumpGround source
Solar system12 kWp
Before (heat/yr)35.000 kr.
After (heat/yr)7.000 kr.
Savings/yr28.000 kr.
Ground source gives highest COP and largest savings
Questions & answers
Frequently asked questions
Get answers to the most common questions about heat pumps and solar panels.
How much can I save with a heat pump + solar?
Most Danish households save 60-80% on their annual heating bill. The exact savings depend on home size, insulation, current heat source, and solar system size.
Does the heat pump work in winter?
Yes. Modern air/water heat pumps work efficiently down to -20°C. The COP value drops slightly in cold weather, but the heat pump is still 2-3x more efficient than direct electric heating.
What does a complete installation cost?
A typical installation with heat pump and solar panels costs 150,000-300,000 DKK depending on home size and system choice. With the savings, the payback period is typically 4-7 years.
Can I use my existing radiators?
In most cases, yes. Air/water heat pumps can connect to existing radiator systems. For optimal efficiency, we recommend underfloor heating or low-temperature radiators.
What happens during a power outage?
The heat pump requires electricity to run. During a power outage, it stops temporarily. With a battery backup system, you can maintain basic heating.
Are there subsidies for heat pumps?
Yes, several subsidy programs exist in Denmark. The Danish Energy Agency and your municipality may have funds. EcoRay helps you identify relevant subsidies as part of the consultation.
Ready to save on heating?
Get a free, no-obligation calculation for your home
Start here – free consultation