Hello,
we still have a question regarding our house construction: We want to install a photovoltaic system in the medium term, preferably combined with a battery storage. Since prices for batteries are expected to decrease in the coming years while quality improves, does it make sense to first install a photovoltaic system with partial self-consumption and feed the surplus into the grid, and then add the battery later to switch entirely to self-consumption? Or are there technical issues or other reasons why this might not be advisable?
Regardless of this, is it sufficient to only make preparations for a photovoltaic system, and what should the scope of these preparations be? For example, we have already planned an empty conduit from the roof to the basement for a future photovoltaic system.
Thank you for your opinions!
we still have a question regarding our house construction: We want to install a photovoltaic system in the medium term, preferably combined with a battery storage. Since prices for batteries are expected to decrease in the coming years while quality improves, does it make sense to first install a photovoltaic system with partial self-consumption and feed the surplus into the grid, and then add the battery later to switch entirely to self-consumption? Or are there technical issues or other reasons why this might not be advisable?
Regardless of this, is it sufficient to only make preparations for a photovoltaic system, and what should the scope of these preparations be? For example, we have already planned an empty conduit from the roof to the basement for a future photovoltaic system.
Thank you for your opinions!
Sir_Kermit schrieb:
But first, you need to install as many solar panels on the roof as possible, according to what the roof’s structural capacity and your budget allow. Was that meant seriously?
Of course, you can install a photovoltaic system on the roof as large as possible. However, since the feed-in tariffs for new systems are very low, a photovoltaic installation only really pays off through self-consumption. That means if the system is oversized, you feed most of your generated electricity into the grid for very little money (unless you have a storage system), and you won’t break even for a long time.
Therefore, in my opinion, the system should be designed based on personal consumption with some margin for growth—the roof doesn’t need to be covered to the last centimeter in my view.
That said—perhaps this is what you referred to—the installation costs per kWp decrease with the size of the system because (besides the solar panels) all other components (inverter, cables, mounting structures, etc.) still have to be paid for.
toxicmolotow schrieb:
Your biggest “problem” will be the inverter since it also needs to support storage. Yep—the inverter must be storage-capable if you want to install a battery. Such inverters typically cost a bit more. If you install a compatible inverter today, it is still uncertain if it will support batteries that may be added in the future.
AndreasPlü schrieb:
My guess is: Electric vehicles are being heavily subsidized right now. The weak spot is the storage. There is a lot of research going on, and Tesla plans to launch an EV with an acceptable driving range this year; others want to follow. At the same time, demand for home storage solutions is increasing. Both lead to higher sales, increased production, and should result in lower prices with higher performance, similar to photovoltaic systems. Those were unaffordable 20 years ago but are completely different today. Tesla already offers EVs with very good range, but also at premium prices. The vehicle they plan to launch soon would be more affordable for the average middle-income buyer.
Especially interesting is Tesla’s battery production. Since last year (I believe), Tesla has been producing storage solutions for residential use. They are aiming for mass production (scheduled to start this year as far as I know), which means their prices are VERY competitive. Just search for “Tesla Powerwall” for more info. However, I don’t know how well their production and delivery schedules are currently running.
You should make sure that the battery is compatible with your inverter. A friend of mine wanted to get a Powerwall but had to give up because his storage-capable inverter was not compatible, so he ordered a different battery instead.
Because of Tesla’s aggressive pricing, some other competitors are now forced to adjust their prices accordingly. So there will be more movement in this market. Some new players (e.g., Daimler) plan to join soon (there was a report in the media when Tesla presented the Powerwall).
Sir_Kermit12 Jul 2016 14:23Hello,
Yep, my thinking clearly leans towards cost-effectiveness, as you put it better than I did:
f-pNo schrieb:
However – maybe you were referring to this – the installation costs per kWp decrease as the system size increases, since
Yep, my thinking clearly leans towards cost-effectiveness, as you put it better than I did:
f-pNo schrieb:
Therefore, in my opinion, the system should be sized according to personal consumption with some reasonable margin – but in my opinion, the roof doesn’t need to be covered down to the last centimeter.
S
Sebastian7912 Jul 2016 14:30Should probably have had a better breakfast – the thing weighs 100 kg (220 lbs). Forklift… *laugh*
S
Sebastian7912 Jul 2016 15:00Obviously, that’s nonsense – it weighs around 100 kilograms (220 pounds), you can handle it with 2-3 people and that’s it.
Especially since he says you need a forklift – so according to him, you couldn’t install this unit in the basement at all.
Especially since he says you need a forklift – so according to him, you couldn’t install this unit in the basement at all.
Similar topics