ᐅ Expanding a Photovoltaic System on a Garage After Initial Installation?
Created on: 21 Feb 2018 14:06
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Chris2806C
Chris280621 Feb 2018 14:06Hello everyone,
My girlfriend and I have decided to carry out our building project with Viebrockhaus.
Since we are building to KfW40+ standards, we need an appropriate photovoltaic system on the roof.
Unfortunately, our house is not optimally, or rather very poorly, oriented.
Rotating the house is not an option (partly because we don’t want to, and partly because we have to comply with a building line/ setback).
We have now considered installing the standard modules for KfW40+ on the roof and later adding an extension on the flat roof of the future detached garage.
Is this even possible? What preparations would need to be made in advance? The detached garage will be built by ourselves (unfortunately only after the main house is completed, as the area has to be used as a staging area beforehand).
This way, we could ensure an optimal orientation.
I would be very grateful for your advice and tips.
My girlfriend and I have decided to carry out our building project with Viebrockhaus.
Since we are building to KfW40+ standards, we need an appropriate photovoltaic system on the roof.
Unfortunately, our house is not optimally, or rather very poorly, oriented.
Rotating the house is not an option (partly because we don’t want to, and partly because we have to comply with a building line/ setback).
We have now considered installing the standard modules for KfW40+ on the roof and later adding an extension on the flat roof of the future detached garage.
Is this even possible? What preparations would need to be made in advance? The detached garage will be built by ourselves (unfortunately only after the main house is completed, as the area has to be used as a staging area beforehand).
This way, we could ensure an optimal orientation.
I would be very grateful for your advice and tips.
T
toxicmolotof21 Feb 2018 14:42Who will design the system?
How much photovoltaic capacity is planned in total?
If the planning and implementation are guaranteed, I would install the photovoltaic system completely, including the garage, and have the modules stored for 6 months.
The inverter must be properly sized and able to handle different orientations, strings, and string lengths.
Alternatively, two independent systems can be used; that also works but may be more expensive. And if batteries and other components are added, it will become more complicated.
How much photovoltaic capacity is planned in total?
If the planning and implementation are guaranteed, I would install the photovoltaic system completely, including the garage, and have the modules stored for 6 months.
The inverter must be properly sized and able to handle different orientations, strings, and string lengths.
Alternatively, two independent systems can be used; that also works but may be more expensive. And if batteries and other components are added, it will become more complicated.
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Deliverer21 Feb 2018 14:59Technically, this is definitely possible. I would run the supply lines to the garage (or at least prepare the conduit). Everything else can usually be done later, when the time comes.
However, for KFW40+ standards, anything beyond that is no longer relevant. So, everything up to the garage must already comply with the regulations.
And another question: what will you do with a solar system on the roof that receives hardly any sunlight? Do you really want to pay for it just so the house can wear the “KFW40+” badge of honor in gold?
I could think of a more cost-effective way to protect the roof tiles...
However, for KFW40+ standards, anything beyond that is no longer relevant. So, everything up to the garage must already comply with the regulations.
And another question: what will you do with a solar system on the roof that receives hardly any sunlight? Do you really want to pay for it just so the house can wear the “KFW40+” badge of honor in gold?
I could think of a more cost-effective way to protect the roof tiles...
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Chris280621 Feb 2018 17:02I’m not looking to start a fundamental debate about whether photovoltaic panels on the roof make sense or not... There will always be those who are completely convinced of their system and consider everything else worthless.
My only concern is whether it is possible to expand such a system and what preparations need to be made in advance...
What type of wiring is typically used to connect a photovoltaic system?
My only concern is whether it is possible to expand such a system and what preparations need to be made in advance...
What type of wiring is typically used to connect a photovoltaic system?
T
toxicmolotof21 Feb 2018 17:242 conductors plus grounding, have 3x 25mm (1 inch) empty conduit installed in the garage. One is for power supply in the garage, and you can use the other two for other miscellaneous purposes.
If retrofitting is a settled matter, you can have the wiring installed directly, not just prepared.
Check with your energy consultant whether a delayed commissioning of the photovoltaic system could affect your eligibility for subsidies.
Also, keep in mind that raised mounting systems for solar panels on single-story buildings can look quite unattractive. Expect opposition from neighbors. If there are design regulations or planning restrictions, make sure to check those right away as well.
What kind of impossible roof do you have that you don’t want or can’t cover it with panels?
Check with your energy consultant whether a delayed commissioning of the photovoltaic system could affect your eligibility for subsidies.
Also, keep in mind that raised mounting systems for solar panels on single-story buildings can look quite unattractive. Expect opposition from neighbors. If there are design regulations or planning restrictions, make sure to check those right away as well.
What kind of impossible roof do you have that you don’t want or can’t cover it with panels?
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