ᐅ Integration of Air-to-Water Heat Pump, Photovoltaic System, and Energy Storage
Created on: 29 Dec 2019 23:12
A
Appel2000
Hello everyone,
In our new build, an air-to-water heat pump will be installed as the heating system. The system will be installed by our general contractor (GC) or their heating company.
I would now like to have a photovoltaic (solar) system installed on the roof (not through the GC, but by a specialist company that I select myself), with the unused electricity being stored.
The idea behind this is, among other things, to generate part of the electricity needed for the air-to-water heat pump ourselves.
Since I wanted to inform myself a bit before talking to the heating company and the solar company, I searched online. Unfortunately, it wasn’t really helpful.
What I found out is the order in which photovoltaic electricity is used:
1) Current consumers in the house
2) Battery charging
3) Air-to-water heat pump
4) Feeding into the grid
Is this correct so far?
Then you need the technical prerequisites so that the inverter, battery, and air-to-water heat pump can communicate with each other.
Who provides these prerequisites and who usually configures this? The heating company or the solar installer? Are special devices required for this?
When the air-to-water heat pump needs electricity again, the battery should of course be used first before drawing from the public grid. Does this also work if we have a special heat pump tariff?
I would appreciate it if someone could shed some light on this!
Thanks in advance and best regards
A
In our new build, an air-to-water heat pump will be installed as the heating system. The system will be installed by our general contractor (GC) or their heating company.
I would now like to have a photovoltaic (solar) system installed on the roof (not through the GC, but by a specialist company that I select myself), with the unused electricity being stored.
The idea behind this is, among other things, to generate part of the electricity needed for the air-to-water heat pump ourselves.
Since I wanted to inform myself a bit before talking to the heating company and the solar company, I searched online. Unfortunately, it wasn’t really helpful.
What I found out is the order in which photovoltaic electricity is used:
1) Current consumers in the house
2) Battery charging
3) Air-to-water heat pump
4) Feeding into the grid
Is this correct so far?
Then you need the technical prerequisites so that the inverter, battery, and air-to-water heat pump can communicate with each other.
Who provides these prerequisites and who usually configures this? The heating company or the solar installer? Are special devices required for this?
When the air-to-water heat pump needs electricity again, the battery should of course be used first before drawing from the public grid. Does this also work if we have a special heat pump tariff?
I would appreciate it if someone could shed some light on this!
Thanks in advance and best regards
A
H
Heidi19656 May 2020 22:21I would like to get your opinion. New construction in Lower Saxony. External dimensions: 10 x 14.50 m (33 x 48 feet). Orientation is north-south. Gable roof therefore facing east and west. The plan is to use underfloor heating and hot water supplied by an air-source heat pump. Electricity will be supplied by a private photovoltaic system and a battery storage unit. In winter, shading could occur due to a park located opposite the house. Two offers are available:
a) Heat pump with 5.08 kW; 15 photovoltaic modules with a total of 5.1 kWp, storage capacity of 5.12 kWh
b) Heat pump with 10.7 kW; 30 photovoltaic modules with a total of 9.9 kWp, storage capacity of 6.5 kWh
Previous electricity consumption in the old building including electricity for hot water and oil heating: 5,400 kWh
Long term plan is to acquire an electric car.
Wood-burning stove planned.
Not a KfW-certified house but built with currently required insulation standards. No mechanical ventilation system.
How should the heat pump, photovoltaic system, and possibly the storage unit be properly sized?
a) Heat pump with 5.08 kW; 15 photovoltaic modules with a total of 5.1 kWp, storage capacity of 5.12 kWh
b) Heat pump with 10.7 kW; 30 photovoltaic modules with a total of 9.9 kWp, storage capacity of 6.5 kWh
Previous electricity consumption in the old building including electricity for hot water and oil heating: 5,400 kWh
Long term plan is to acquire an electric car.
Wood-burning stove planned.
Not a KfW-certified house but built with currently required insulation standards. No mechanical ventilation system.
How should the heat pump, photovoltaic system, and possibly the storage unit be properly sized?
K
knalltüte6 May 2020 23:32hampshire schrieb:
.... The modules themselves are internally connected in parallel with 2Bus cells. The photovoltaic tiles are all connected in parallel. Maybe this is one reason for a comparatively good yield. The roofs face south with perhaps 15 degrees toward the east.
The left roof has 2 strips of photovoltaic tiles, the right roof a larger area. The arrows help to identify.
.Very, very nice house! It seems like a peaceful area.
I can’t see photovoltaic tiles. Very well done!
May I ask which tiles these are, how old they are, and what the approximate power output in kWp per m2 (square meter) is?
I know the Nelskamp solar (thermal) tiles; did they also have photovoltaic options?
H
hampshire7 May 2020 15:09The Autarq tiles on our roof are based on the Creaton Domino and are somewhat less efficient than the current tiles. Autarq specifies a range between 126 and 136 watts per square meter (square yard) for heat pumps. Keep in mind that each tile also has non-photovoltaic surface area. Therefore, the area yield is lower compared to standard modules. On the other hand, because of the parallel connection, you don’t have shading issues and can cover roofs with dormers and windows more completely.
Purely in terms of energy yield, standard panels are more economical – but if you look into the future and assume an increase in property value from solar tiles instead of standard modules, the picture can change. We just wanted a beautiful house. The actual output is better than the sales calculations. What more could you want?
Purely in terms of energy yield, standard panels are more economical – but if you look into the future and assume an increase in property value from solar tiles instead of standard modules, the picture can change. We just wanted a beautiful house. The actual output is better than the sales calculations. What more could you want?
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