We recently bought a house with all the contracts that come with it. Among other things, there is a gas supply contract with the company Primagas. This includes a rental tank.
When you buy a house with natural gas, you do not buy the supply contract. It is terminated by the previous owner and the new owner has to take care of it.
When you buy a house with an oil heating system, the oil also becomes the property of the new owner.
And with liquefied petroleum gas, it should also be up to you if you choose a supplier.
I find it surprising that the delivery price of €0.63/L is higher than the indicated average (which you can google on the web). Are you perhaps comparing gross with net prices somewhere?
And what does the contract say about the rental tank?
If the installment is €150, it could also be that the consumption of the previous owner was very high. Or rather, the consumption depends on how big the place is, etc. And then I don't find €150/160 so high anymore. It's more than an older row house or a new building, but still within reason and understandable.
I am now reading that these numbers are for the new contract. What kind of contract is that? One where you have flexibility? Those are expensive... or what consumption did you assume?
I would have the previous owners’ annual bill given to me and compare carefully.
I just can’t imagine that they are proportionally much more expensive.