ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Bookstar schrieb:

I just did the calculation, the payback period is over 20 years. In practice, it's probably closer to 25-30 years.

My guess: You can't do the math.

Bookstar schrieb:

A photovoltaic system doesn’t even pay off within 12 years with self-consumption and feed-in combined. How is it supposed to pay off at all without self-consumption? I’m curious!

Nonsense again. 10 kW system – just installed. Costs €11,500. Payback with 8 cents feed-in tariff and about 35% self-consumption after 8.5 years. Cheaper system = faster payback. Higher self-consumption = faster payback. Full feed-in about 11 years.

Bookstar schrieb:

A photovoltaic system doesn’t even pay off within 12 years with self-consumption and feed-in combined. How is it supposed to pay off at all without any self-consumption? I’m curious about that!

I just calculated it, the payback period is over 20 years. After that, the system is basically worthless. You can forget about it 🙂. That calculation doesn’t include insurance or the possibility that the inverter might fail during that time. In practice, the payback period is probably closer to 25-30 years.

I really can’t read this anymore. Stop talking down photovoltaics.

Especially considering your heat pump consumption and electric car, a photovoltaic system without storage would at least be cost-effective.

Even I end up with over €4,000 profit after 20 years including storage, without factoring in any increase in electricity prices, taxes, performance losses, insurance, etc. My photovoltaic system generated a gross profit/savings of €1,639 in its 50th week. You can extrapolate that over 20 years and deduct whatever costs you want. If after deductions you end up with around €19,000, we’re basically breaking even.

Bookstar schrieb:

A photovoltaic system doesn't pay off even with self-consumption and feed-in within 12 years. So how is it supposed to pay off at all without any self-consumption? I'm curious!

I just did the calculation, the payback period is over 20 years. Then the system is basically useless. You can forget about it 🙂. That doesn’t even account for insurance or the inverter breaking down during that time. In practice, you're more likely looking at 25 to 30 years.

Just stop trying to cover up lack of experience and knowledge with prejudice.

I simply estimated it using Google's values. 7 kWp costs 10,000. You get 8 cents for feed-in. 800 kWh annually per kWp. That equals 450 euros in yearly revenue.

So, it's at least 20 years. Any counterarguments? 🙂

Bookstar schrieb:

I simply calculated it using Google values. 7 kWp costs 10,000. You get 8 cents for feed-in. 800 kWh annually per kWp. That results in 450 euros annual yield.

So that’s at least 20 years. Any counterarguments? 🙂

It’s all shown with my data. These are not fictional values. The calculation is based on my real feed-in tariff and electricity provider price.