Photovoltaic storage - experiences? Tips?

But first, the solar cells have to go on the roof, as many as possible and as the statics of the roof and your account allow.

Was this meant seriously? Of course, you can install a photovoltaic system on the roof as large as possible. However, since the feed-in tariff for new systems is very low, a photovoltaic system pays off mainly through self-consumption. That means with an oversized system, you feed the majority of your production into the grid for cheap money (if no storage is available) and you will not reach break even for a long time. Therefore, in my opinion, the system should be built according to personal consumption with some room to grow – but in my opinion, the roof does not need to be covered to the last centimeter. However – maybe you referred to this – the installation costs per kWp decrease the larger the system is, since (besides the solar cells) all other components (inverter, cables, scaffolding, etc.) still have to be paid for.

Your biggest "problem" will be the inverter because it also has to be "storage"-capable.

Yep – the inverter must be storage-capable if you want to install a storage system. Such a device also costs a bit more. If you install such an inverter today, however, it is not certain whether it will be suitable for future storage systems as well.

My speculation is: E-cars are currently strongly subsidized. Weak point: the storage. There is a lot of research going on and Tesla wants to bring an E-car with acceptable range to market this year, others want to follow. Demand for storage units in households is also increasing. Both lead to higher sales, more production and should also lead to lower prices with better performance, see photovoltaic systems. Those were unaffordable 20 years ago, today it looks very different.

Tesla already has E-cars with very good range. However, also for very deep pockets. The vehicle they want to launch soon would then be one for the average well-off person. Especially interesting at Tesla is the storage production. Because Tesla has been building storage solutions for private households since last year (I believe). Since Tesla designs this for mass production (to my knowledge mass production should start this year), the prices called out are VERY good. Just google "Tesla Powerwall". However, I do not know how well they keep up with production/delivery. One should inquire carefully how compatible the battery is with the inverter. An acquaintance of mine wanted to get a Powerwall. But since his (storage-optimized) inverter was not compatible, he refrained from it or ordered a different battery. Due to Tesla's cut-throat prices, some other players are now forced to follow prices in the future. So there will be further movement. Some new ones (e.g. Daimler) also want to get involved in the future (there was a report in the media when Tesla presented the Powerwall).

Hello,

However - maybe you were also referring to this - the production costs per kWp decrease as the system size grows, because

Yep, my thinking clearly goes in the direction of price/performance ratio, as you put it better than I did:

Therefore, in my opinion, the system should be sized according to personal consumption with a good margin upwards - but in my opinion, the roof does not have to be covered to the last centimeter.

My electrician said that he does not offer Tesla storage to his customers because they are incredibly heavy and have to be hoisted to the wall with an extra forklift. Therefore, it is generally difficult in many households.

Can anyone confirm this?

Better eat breakfast - that thing weighs 100 kg. Forklift....*laugh*

According to the assembly instructions, a lifting device is recommended or appropriate help to lift 115 kg and mount it at a certain height.

So it is not complete nonsense now.

Of course, that's nonsense - it's around 100 kg, you do that with 2-3 people and that's it.

Especially since he says you need a forklift - so according to him, you couldn't even install the part in the basement anymore.