ᐅ Is it worthwhile to use a cloud-based solution alongside an energy storage system?
Created on: 28 Aug 2019 16:09
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Heidi1965
We are planning to build a new house. Approximately 120 sqm (1,292 sq ft) of living space on the ground floor for two people (retirees), and a single one-bedroom apartment upstairs for a working individual.
A gable roof oriented east-west is planned. We intend to install a photovoltaic system and a heat pump with underfloor heating. According to our information, a ground-source heat pump is more efficient than an air-source heat pump, although the former has higher upfront costs. However, this is offset by higher subsidies for the ground-source heat pump.
A tradesperson also recommends adding a storage system for peak production times. This would result in an annual self-sufficiency rate of about 50%. Others suggest using a “cloud” storage option (instead of feeding excess energy into the grid with currently low feed-in tariffs), where energy that does not fit into the storage can be saved and then retrieved in winter. However, I wonder how this works, as everyone requires more energy in winter than they produce themselves. According to the vendor of this product, the “cloud” solution would enable autonomy of 70 to 80%.
Who can calculate which is the most practical solution?
A gable roof oriented east-west is planned. We intend to install a photovoltaic system and a heat pump with underfloor heating. According to our information, a ground-source heat pump is more efficient than an air-source heat pump, although the former has higher upfront costs. However, this is offset by higher subsidies for the ground-source heat pump.
A tradesperson also recommends adding a storage system for peak production times. This would result in an annual self-sufficiency rate of about 50%. Others suggest using a “cloud” storage option (instead of feeding excess energy into the grid with currently low feed-in tariffs), where energy that does not fit into the storage can be saved and then retrieved in winter. However, I wonder how this works, as everyone requires more energy in winter than they produce themselves. According to the vendor of this product, the “cloud” solution would enable autonomy of 70 to 80%.
Who can calculate which is the most practical solution?
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boxandroof28 Aug 2019 18:23Heat pumps definitely have the potential to be cheaper than gas. In our case, the running costs are several hundred euros lower than they would be with gas. The cost-effectiveness mainly depends on the price charged for the installation. Here, too, a heat pump can be cheaper than gas but can also become significantly more expensive. Proper planning is crucial for efficient operation. Otherwise, I agree with Bookstar.
Regardless of the heating system, it is essential to design the underfloor heating for low supply temperatures to allow for the option to switch the energy source later.
Regardless of the heating system, it is essential to design the underfloor heating for low supply temperatures to allow for the option to switch the energy source later.
Heidi1965 schrieb:
A craftsman additionally recommends a storage system for peak production times. This would result in a self-sufficiency rate of about 50% over the year. Yes, the self-sufficiency rate does indeed increase, but unfortunately the total costs also go up. At the moment, battery storage systems are still far too expensive to be cost-effective.
I think you should calculate and get quotes for a more straightforward system. Gas condensing boiler, and that’s it. Unless you have extra money and want to spend it on technical gadgets.
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