Photovoltaic + Battery - Which System - Experiences?

  • Erstellt am 2016-01-02 10:27:23

f-pNo

2016-02-04 13:07:58
  • #1
If you have it prepared, also make sure to choose an inverter that is suitable for the future operation of the system including a battery.

From the beginning, we entertained the idea of adding a battery later. However, we did not pursue this idea intensively and only mentioned it in passing to our photovoltaic seller. When the report about the Tesla Powerwall first appeared in the middle of last year, I asked our seller whether our inverter would be suitable for it. Unfortunately, it is not.

An acquaintance of ours is also having photovoltaic panels installed on his new build and is also considering Tesla batteries. His seller has so far been unable to say with certainty whether the SMA inverter offered to him is suitable for future Tesla batteries.

Personally, I consider Tesla to be a very interesting option due to its experience in electric car manufacturing (after all, one of the few providers whose battery system doesn’t fail after 100 km and whose vehicles also offer a reasonable travel speed – unfortunately, however, priced far from reasonable). In terms of price, these batteries are said to be very good – unlike previous providers on the market – as the factory was designed for mass production.

By the way: Shortly after Tesla announced their plans, Daimler also stated that they wanted to compete in the battery market in 2016 (but since then I haven’t heard anything more). And last month BMW also published its ambitions, although I didn’t really understand that very well (there was talk of "recycling" car batteries and selling them as batteries for, e.g., single-family homes).

For now, we will just sit back and watch. What are the first experiences? How will the market develop price-wise? etc.
 

Kuka86

2016-02-05 18:14:09
  • #2
Hi,

I am new here and this year my wife and I will have a Hanse Haus built in beautiful Wilhelmsfeld (BaWü).

We are also interested in the topic of photovoltaics + storage, and especially from Daimler (I am an employee) there is now a program available to buy, the complete system and the individual storage through the 100 percent Daimler subsidiary Accumotive.

I find the complete offer from EnBW with the Energy Base particularly interesting.

So far, however, we are only before the actual planning phase of photovoltaics, so we cannot make any statements regarding price/performance yet.


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Thank you!
Construction expert
 

tjoma83

2016-02-09 07:03:51
  • #3
I was initially advised against a battery storage system in general. A photovoltaic consultant said that the inverter from the well-known manufacturer supports Smart grid and can therefore control the heat pump. So that during the sunny period the heat pump is sufficiently supplied and heats the water boiler fully at the optimal time. After that, not much additional energy would be needed. I want to ask around if anyone has also implemented this solution this way...
 

Badda

2016-02-22 16:36:14
  • #4
I would initially also always advise against a battery storage. It always depends a bit on the individual case.
 

tjoma83

2016-02-22 16:43:02
  • #5
Meanwhile, I also believe that the battery storage can wait.
 

T21150

2016-02-23 09:03:50
  • #6
Hi,

as a compromise, I chose an SMA Sunny Boy Smart Energy.

2kWh - coupled to the inverter.

The system is supposed to work very efficiently due to a high efficiency rate. The charging losses are comparatively low. The charging rate is supposed to be >> 1 per day.
Goal: bridge cloud gaps, get the house through the night from the battery as often as possible. Increase self-consumption from about 30% rather towards 50%. Mathematically possible. I lack practical proof. The calculation shows that I can draw about 750 kWh/year from the battery on average and will have about 1400 kWh self-consumption. As a quota for grid electricity, I have now taken 2000 kWh/year, which is too much, but I get reimbursed.

I will certainly be able to convince myself of whether I made the right choice in the very near future (no installation date yet). And to what extent the calculation will match reality.

The photovoltaic system itself has O-W orientation, about 2*3.7 kWp. 15 collectors east, 13 west.

The battery is only due to my playful nature. I do not believe it pays off at the current electricity price.

Best regards
Thorsten
 

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