ᐅ Which energy storage system is best suited for use with a solar power system?

OWLer schrieb:

Thanks for the report. Have you calculated when the investment pays off? The question is genuine and not meant to provoke, as the solar installer also offered us a BYD battery.

What is cell drift?

I didn’t look into that, since we still had a large loan balance to pay off. That’s why I chose the battery—to keep the monthly additional costs as low as possible over the next few years. The rest went toward extra loan repayments. So if you can use the money better elsewhere, go for it. You can easily calculate the 30% home consumption from the battery yourself.

It’s pretty straightforward. The battery management system limits the output of new panels to the performance level of the older panels. After one year, the difference is already significant, which apparently is why the manufacturer recommends adding the battery only within the first 12 months.

Thank you all for your answers! They were really very informative!

@RotorMotor, until now I assumed that there were no funding opportunities available.

I am now considering the option of installing only photovoltaic panels and, for the time being, not seriously considering a storage system.

Zaba12 schrieb:

since we still had a lot of loans left that needed to be cleared.

Wow... did the bank just give you the money?
That sounds great – did you manage with a shovel, or did you need a digger?

Träumerle schrieb:

@RotorMotor, I had previously assumed that there are no funding opportunities at all.

Battery storage really only makes sense with a KfW40+ new build.
And maybe some federal states or cities offer subsidies.

Without subsidies, it’s better to skip it. Better for the environment and your wallet.

pagoni2020 schrieb:

Wow... did the bank just give you the money?
That sounds great – was it still manageable with a shovel, or did you have to bring in an excavator?

Problem of overfinancing and too low equity.

As long as battery storage systems remain at their current price levels, they are not yet worthwhile. Ideally and from an environmental perspective, perhaps, but that is more of an optimistic assumption. Even now, when you can buy 2.4 kWh for just under 1000€ (Pylontech LiFePo4 batteries), you could purchase a large amount of electricity for that money over a long period. Personally, I find the idea of a system with a hybrid inverter, a large battery bank, and as much off-grid capability as possible very appealing, but mostly because I find the technology interesting. From a practical standpoint, it is still not economically sensible.