Experiences with Caterva Sun battery storage

It sounds like with you, self-generated photovoltaic electricity is gone for good if you don't use it directly yourself. Of course, that is not the case; it is fed into the grid and compensated. When it is needed, you buy it back. Selling at 12.3 cents and buying back at 28 cents is, of course, not such a great deal at first glance - let's call it storage loss - but free of investment costs. How many kWh you have to draw from a storage for this difference of about 15 cents per kWh to make sense is something everyone can calculate for themselves. Whether they will experience the amortization in their lifetime ... probably not.

The inefficiency of these storage systems is simply dressed up in a new guise to make the unmistakable a little harder to recognize. That there are power companies behind it tells you absolutely nothing. These are the same guys who call their great new product "electricity flat rate," when in reality it is a package tariff that has existed forever - an expensive one at that. The same ones who offer photovoltaic systems for installation that are about 30-50% above current market prices, making amortization impossible.

Anyone calculating with an average of 33ct/kWh (and thus assuming a regular electricity price increase of 3%) will find every photovoltaic system profitable.

For 33,000 EUR, which is only the cost of the storage (without photovoltaic), I could obtain 156,000 kWh (7,800 kWh/year).

Indeed, at Caterva the amount of electricity generated by the photovoltaic system is available as free electricity. Regardless of the time of year or day. A storage system raises the self-consumption rate of a photovoltaic system to about 70%. However, as already mentioned, the storage system is used to provide [PRL]. [PRL] is the most expensive service, averaging about €168,000/MW annually since 2001 (refer to Regelleistung.net), and from these revenues the missing 30%, the maintenance contract for 20 years, as well as the annual community premium are paid. It is not necessary to calculate with 33 cents; with a consumption of 5,000 kWh/year, even a net 24 cents is enough to achieve a good return. If anyone has questions beyond some basic knowledge, I am happy to help at any time. RudiH

Hello everyone, what should also be mentioned positively about the Caterva project is that, like us, we can always charge our electric car and electric scooter from home. Even though there are still many opportunities to charge inexpensively at the moment, the trend will soon change.

Best regards Artur

Hello everyone,

I am very committed to acquiring a Caterva Sonne (21 KW battery storage) for my newly to be built single-family house, with which Caterva also provides control reserve services on the electricity market.

Unfortunately, there are no hits in the search function, so I would be interested to know if anyone here has already had experience with it or has received advice?

Thank you very much for your feedback.

Hello Dennis,

have you bought the battery now, I am also considering Caterva or C3DC home power plant

Herbie

You probably mean E3/DC, right? We will get an E3/DC Blackline with 10.56kWh.