ᐅ Roof with photovoltaic system or alternative investments – experiences?
Created on: 7 Aug 2017 21:21
R
RumpelHumpel
Hi,
I am currently planning to renovate our 29-year-old house. Apart from recurring maintenance work, no major modernization measures have been carried out so far. We have insulated the walls ourselves in the past, but nothing else.
This means the house:
- still has the original roof
- the original gas heating system
- the original windows on the ground floor
What is already decided and will be done in late summer/early autumn is a roof renovation according to KFW standards. The roof will be completely rebuilt and insulated.
Additionally, I have budgeted around 13,000 euros for a photovoltaic system. However, I am still unsure how practical installing a photovoltaic system really is. The company I am in contact with recommended using the electricity ourselves and feeding the surplus into the grid. My initial thought was to include a storage system to use electricity at night or during bad weather. The location would actually be ideal for a photovoltaic system, as our roof faces southeast.
That’s why I am now considering whether I should invest the money in a new heating system instead. Our heating has been in use since the house was built and has never caused any problems. However, I believe that new gas boilers operate more efficiently and should reduce gas consumption (hopefully). I would probably also have a bit of extra money left over to possibly replace some radiators, if that can contribute to better efficiency...
Maybe you have some advice or would like to share what you would do.
Regards
I am currently planning to renovate our 29-year-old house. Apart from recurring maintenance work, no major modernization measures have been carried out so far. We have insulated the walls ourselves in the past, but nothing else.
This means the house:
- still has the original roof
- the original gas heating system
- the original windows on the ground floor
What is already decided and will be done in late summer/early autumn is a roof renovation according to KFW standards. The roof will be completely rebuilt and insulated.
Additionally, I have budgeted around 13,000 euros for a photovoltaic system. However, I am still unsure how practical installing a photovoltaic system really is. The company I am in contact with recommended using the electricity ourselves and feeding the surplus into the grid. My initial thought was to include a storage system to use electricity at night or during bad weather. The location would actually be ideal for a photovoltaic system, as our roof faces southeast.
That’s why I am now considering whether I should invest the money in a new heating system instead. Our heating has been in use since the house was built and has never caused any problems. However, I believe that new gas boilers operate more efficiently and should reduce gas consumption (hopefully). I would probably also have a bit of extra money left over to possibly replace some radiators, if that can contribute to better efficiency...
Maybe you have some advice or would like to share what you would do.
Regards
B
Bau-Schmidt10 Aug 2017 14:05Tentakel schrieb:
A brief addition: I ultimately installed two 40mm (1.5 inch) conduits on the roof to allow for possible upgrades in 10 years. In my opinion, conduit pipes also make sense for the garage. I consider that to be sensible. There are many things in house construction without any practical comfort benefits. It all depends on the individual’s attitude toward these matters.R
RumpelHumpel20 Oct 2017 11:37Hi,
I wanted to give an update on what we have accomplished so far.
The roof, insulated and covered according to KfW standards, was completed this week.
The appearance is amazing, and the insulation quality was immediately noticeable in a positive way.
Additionally, I decided on a small photovoltaic system with the option to expand later.
This means extra wiring was installed on the roof to easily add more panels in the future.
For the next 3–5 years, we will use the 4 kWp system and gain experience with it.
There is enough budget left to replace the heating system, which will also include a hydraulic balancing.
The window panes will still be replaced, and then our major modernization measures will be completed for now.
Best regards
I wanted to give an update on what we have accomplished so far.
The roof, insulated and covered according to KfW standards, was completed this week.
The appearance is amazing, and the insulation quality was immediately noticeable in a positive way.
Additionally, I decided on a small photovoltaic system with the option to expand later.
This means extra wiring was installed on the roof to easily add more panels in the future.
For the next 3–5 years, we will use the 4 kWp system and gain experience with it.
There is enough budget left to replace the heating system, which will also include a hydraulic balancing.
The window panes will still be replaced, and then our major modernization measures will be completed for now.
Best regards
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