Distinguish electricity generation from heating services
Solar PV panels generate electricity. A heat pump uses electricity to provide the services included in the installation. Combining the two technologies allows some consumption to come from your own generation when conditions permit, but does not automatically make all heating and cooling independent of grid electricity.
Before assessing the combination, clarify whether you want heating, cooling, hot water or several services. It is also important to distinguish solar PV from any existing solar thermal installation. Equipment photographs and documents help identify what is already in the home and what you want to add.
Look at timing, not just annual totals
IDAE highlights the importance of generation and consumption coinciding when using your own electricity. An annual generation figure does not show when that energy will be available. Occupancy patterns, hot water use and heating and cooling needs should form part of the assessment.
Prepare a simple household schedule: days spent working from home, the busiest hours and differences between summer and winter. If you already have solar PV, gather available generation and consumption records. Comparing actual periods is more useful than assuming every day behaves like a sunny spring day.
Ask what coordination the equipment supports
Some solutions provide functions for coordinating the heat pump with an energy management system. Compatibility depends on the models, their interfaces and the installed components. It should not be assumed simply because both products have a mobile app.
Ask for an explanation of what the system will do: which information it will use, which services it can adjust and which limits it will retain. Also ask how you can control it manually when needed. If different teams carry out the installations, identify who is responsible for checking communication and explaining their combined operation.
Comfort and protective functions remain requirements
Changing some schedules may be an option, but it must respect the household's needs and the equipment instructions. Moving all activity into one time slot makes little sense if service is unavailable when needed. Hygiene or protective functions should not be altered simply to pursue a self-consumption figure.
Ask to see a normal-use scenario and another with insufficient solar generation. This will explain how service is maintained and the role the grid continues to play. If battery storage is considered, it should be an option assessed using your data, rather than an addition assumed to be compulsory.
Review the results using comparable data
Once the system is running, distinguish electricity generated, used in the home and purchased from the grid using the available records. A lower bill may have several causes, including changes in tariff or occupancy. Assessing the installation requires a consistent comparison of periods and usage.
Keep the equipment references, agreed diagram and explanation of the controls. Ask for the assumptions behind any estimate and do not treat it as a universal guarantee. The combination is best considered across the whole household: heating, cooling, hot water and other electricity uses share the same energy context.
More common questions
Do I need a battery to combine a heat pump with solar PV?
It is not a universal requirement. Whether one is useful depends on generation, consumption and the proposed solution. It should be assessed as a specific option.
Can any unit connect to any energy management system?
That should not be assumed. Compatibility between models, interfaces and functions must be checked, and responsibility for configuration and testing agreed.
Sources and technical reading
Some source documents are available in Spanish.