ᐅ Issues with the installation alignment of our planned solar power system
Created on: 1 Feb 2018 21:10
L
LobsterGood evening,
Our building permit / planning permission has already been approved, and the final planning is underway.
Now we have a problem with the solar system for domestic hot water.
The roof ridge runs almost exactly from north to south. This means we only have space on the east and west sides of the roof. The energy consultant ran the calculations and concluded that neither side provides enough capacity to meet all requirements.
Simply rotating the house is not an option, and of course, we had a reason for placing it as we did. However, we did not anticipate these issues.
One initial idea was to install the system on the carport roof at home. However, this is not directly attached to the house, so a distance of about 6–10 meters (20–33 feet) would need to be bridged to the utility room.
Does anyone have experience or ideas? We would really appreciate it.
Our building permit / planning permission has already been approved, and the final planning is underway.
Now we have a problem with the solar system for domestic hot water.
The roof ridge runs almost exactly from north to south. This means we only have space on the east and west sides of the roof. The energy consultant ran the calculations and concluded that neither side provides enough capacity to meet all requirements.
Simply rotating the house is not an option, and of course, we had a reason for placing it as we did. However, we did not anticipate these issues.
One initial idea was to install the system on the carport roof at home. However, this is not directly attached to the house, so a distance of about 6–10 meters (20–33 feet) would need to be bridged to the utility room.
Does anyone have experience or ideas? We would really appreciate it.
M
Mastermind11 Feb 2018 21:21Why is solar thermal still installed on roofs today? Is it necessary to complement a gas or oil heating system?
Alternatively, you could check if a small domestic hot water heat pump is an option to cover the renewable share, and at the same time have the roof assessed for photovoltaic panels.
There might also be subsidies available for the domestic hot water heat pump.
Given the decreased costs for photovoltaic systems and their high efficiency and good power output per module, I would always consider photovoltaics. Solar thermal, on the other hand, less so...
Alternatively, you could check if a small domestic hot water heat pump is an option to cover the renewable share, and at the same time have the roof assessed for photovoltaic panels.
There might also be subsidies available for the domestic hot water heat pump.
Given the decreased costs for photovoltaic systems and their high efficiency and good power output per module, I would always consider photovoltaics. Solar thermal, on the other hand, less so...
B
Bieber08152 Feb 2018 07:55Lobster schrieb:
Does anyone have experience or an idea? Well, maybe consult another energy consultant? What requirements need to be met, what exactly is causing the problem, and how tight is the situation?
Are there any other conditions (mechanical ventilation with heat recovery)? Overall concept (building envelope, heat generation)?
Is the available area (each side of the roof, both sides together) already fully utilized?
Thank you for your feedback.
So far, communication with the energy consultant has been handled directly through the developer. I’m not familiar with this area and can’t say exactly what the issue is or what requirements need to be met – in any case, we have not used any KWF funding, so we are only bound by the current standards for new buildings.
A solar system with an area of about 5 sqm (54 sq ft) is planned. There is 200 liters (53 gallons) of solar storage volume for heating domestic hot water (including 100 liters (26 gallons) of standby volume).
According to the current plan, this rooftop installation can only be placed on the west side of the roof, which does not seem sufficient. If we can’t find another suitable location, increasing the surface area could be an option.
We have not planned a mechanical ventilation system with heat recovery and assumed that we could meet all requirements with standard building measures. With such a ventilation system, the solar system would also be sufficient on the west side. A decentralized solution is not an option for us, and a central system costs over €10,000 (not budgeted), but that is another topic. The goal is first to find a viable solution like this.
So far, communication with the energy consultant has been handled directly through the developer. I’m not familiar with this area and can’t say exactly what the issue is or what requirements need to be met – in any case, we have not used any KWF funding, so we are only bound by the current standards for new buildings.
A solar system with an area of about 5 sqm (54 sq ft) is planned. There is 200 liters (53 gallons) of solar storage volume for heating domestic hot water (including 100 liters (26 gallons) of standby volume).
According to the current plan, this rooftop installation can only be placed on the west side of the roof, which does not seem sufficient. If we can’t find another suitable location, increasing the surface area could be an option.
We have not planned a mechanical ventilation system with heat recovery and assumed that we could meet all requirements with standard building measures. With such a ventilation system, the solar system would also be sufficient on the west side. A decentralized solution is not an option for us, and a central system costs over €10,000 (not budgeted), but that is another topic. The goal is first to find a viable solution like this.
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