Heat pump: buffer tank, capacity and modulation

Did you find out more about direct marketing at EnBW? Can you share anything about it? Otherwise, try a smaller consultant, they sometimes still make the effort to prepare everything so that the bank has little effort and know banks that will do it. I think it will definitely be difficult under 50k. Maybe build a garden shed and put photovoltaics on it? Bigger storage to drive the costs?

Hi, I checked with Lumenza. They specialize in direct marketing of small systems. Whether that will really work out in the end is another matter. Hmm. Artificially driving up the costs to get over 50k probably doesn’t make much sense in the end. We already have a 10 kWh storage system in planning, I can’t empty more in summer and can’t fill more in winter. Yes, we could fully utilize the carport, but that just creates more costs without much added value. And then the ROI in the end isn’t so great either. Of course, I can also ask the energy consultant and tomorrow I will push myself once again and check out some bank branches here on site. But without 0.24% financing, it probably won’t work, paying by myself is no fun and then the whole thing is just burning money. Damn... just before the finish line... Best regards, Andreas

what? No! Definitely fully occupy the carport! The marginal costs for each additional module decrease. You can feed in more (store more) etc. Since the fixed costs for installation only occur once, it is good if they are distributed over more kWp. Ok, there are a few step-active costs. If you exceed certain limits, you might then need a larger or second inverter etc. So you really have to watch that you are just above that, but otherwise more is always more with the modules. You're right about the storage, you don't need a larger one there. But if it's about just getting over 50 TEUR... You're not that far off there. If it has to be 75 TEUR, ok that's a bit too much. But I think 50 should be possible somewhere.

Hi,
I checked with Lumenza. They specialize in direct marketing of small systems. Whether that really works out in the end is another question.

Hm. artificially driving up the costs now to get over 50k probably doesn't make much sense in the end. We already have a 10 kWh storage system in planning, I won’t be able to empty it in summer or fill it in winter. Yes, we could fully occupy the carport, but that only generates more costs without much added value. And then the ROI is not so great again in the end.
Of course, I can also ask the energy consultant and tomorrow I will push myself again and check out some bank branches here locally. But without 0.24% financing, this probably won’t work, paying myself doesn’t make fun and then the whole thing is just burning money.

Damn... just before the goal...

Best regards,

Andreas

Just take the heat pump offer for 42k and presto, you’re well over 50 with photovoltaics :)

What do you mean by “paying myself doesn’t make fun” – financing at market interest rates or paying entirely in cash?

Morning,

"paying yourself is no fun" - finance at market interest rates or pay entirely from own funds?

In the end, it comes down to the same thing. Whether I finance the money or withdraw it from the stock portfolio: in both cases, I must calculate a good 4% interest. Incidentally, this is overlooked in almost all profitability calculations for photovoltaic systems. The money always just falls from the sky there.
And if you have to calculate 4% on the invested money, the ROI for the combination of heat pump and photovoltaic easily shifts to 20 years and more. By then, the heat pump will already be due for replacement. That would really only be for passion or for a clear conscience or to be independent of gas. In other words, this is not just a break-even but you will predictably lose money. And that’s what I mean by "paying yourself."

Only the photovoltaic still works, you can still make the numbers look good with equity, the ROI is then somewhere around 13-15 years, and the systems are supposed to last significantly longer than that.

With the KFW loan, you get a ROI of 12 years for the entire renovation measure and don’t have to break your piggy bank beforehand. In other words, it’s not only good for the environment but also economically viable.

Best regards,

Andreas