ᐅ New single-family home with propane gas – is it possible without photovoltaic or solar panels?

Hello everyone,
for our building project, a 150 sqm (1,615 sq ft) single-family home for two people in Saxony, I am researching heating options in advance. Geothermal energy, heat pumps, and so on are somewhat familiar to me by now, but I am now wondering about heating with liquefied petroleum gas (LPG).
At the fully developed building plot, everything is connected except for a gas supply line. A few new buildings nearby have obviously chosen LPG, which is still relatively common in new construction here in the eastern part of our country (unlike in my former home region of Baden-Württemberg).
We will probably have lower heating demand since it will mostly be just the two of us at home; during the day, only one or sometimes nobody will be there.
From what I have read and hopefully understood correctly, photovoltaic systems alone usually make little sense; I had solar panels on my old house, which was nice, but whether it paid off over 10 years... I have no idea.
The general contractor will probably offer an air-to-water heat pump as standard, which I will definitely look into, as well as geothermal energy.
Still, I am also considering LPG because I have a large plot (to bury the tank) and the technology is reliable and well-proven.
With all the things like KfW funding, etc., I can’t seem to find any information about whether and what I must use in addition when choosing LPG.
So my question is:
Do I have to install an additional energy source if I use LPG?
Are there any sensible alternatives or ideas for using LPG?

Well, as long as you comply with the energy saving ordinance, I think, from a layperson’s perspective, it should be possible. However, achieving KFW55 or higher might be quite challenging.
Whether that is necessary is another question.

In Berlin, the following applies:
- If natural gas is available, liquefied petroleum gas (LPG) is not allowed.
- If there is a gas heating system, it must be supplemented with renewable energy.

Regarding gas heating:
- Costs include new connection fee + monthly basic charge + consumption + chimney sweep.

Regarding LPG:
- Costs include the tank (purchase or rental) + annual tank inspection + TÜV inspection every 10 years + chimney sweep + consumption.

In energy-efficient houses, the consumption share is pleasantly low, but if one system is €3,000 more expensive to install, you can cover the price difference by heating costs over time.
If you own your tank, you can refuel freely (which can save about 10-20%).

In our case, the calculation worked out for an air-to-water heat pump.
Best regards, Nida35a

If you choose an air-to-water heat pump, then select quiet models, under 35dB.

Nida35a schrieb:

In Berlin, the following applies:
- If natural gas is available, liquefied petroleum gas (LPG) is not allowed.
- If using a gas heating system, it must be supplemented with renewable energy.

Regarding gas heating:
- Costs include new connection + monthly basic fee + consumption + chimney sweep.
Regarding liquefied petroleum gas (LPG):
- Costs include the tank (purchase or rental) + annual tank inspection + certification every 10 years + chimney sweep + consumption.

In energy-efficient houses, consumption is pleasantly low, but if one system costs €3,000 (about $3,200) more to install, you can heat for a long time with the cost difference.
If you own your tank, you can purchase fuel freely (saving quickly 10–20%).
In our case, the calculation worked out in favor of an air-to-water heat pump.
Best regards, Nida

Thank you,
Natural gas is not available. I will compare the air-to-water heat pump, etc., once the information is available.
My goal is to explore all options, and if I have to install solar panels on the roof, that version would probably be excluded. Currently, we have liquefied petroleum gas, so that option is at least conceivable for us.
What other types of renewable energy are possible besides photovoltaic and solar thermal?

Solar thermal systems are often added here for cost reasons.