We have an 8.7kW Canadian made pellet stove which I bought on UK Ebay in 2008, and moved from our previous house in 2012. It is installed in the main living room in the centre of the house, the other rooms being adequately heated by normal air circulation. I have maintained it fairly easily at reasonable cost, using parts sourced from both France and Canada.
Our average consumption of pellets was 35 x 15kg bags per year.
We used it as our main heating source once the outside temperature dropped below about 7C, when the air/air heat pumps became less efficient, until the winter of 2022, when the price of pellets soared from around 4€50 to almost 10€ per bag.
We managed to get through the winter on 8 new bags plus 2 left from the previous winter by running the heat pumps longer and lowering the temperature in the house.
A quick calculation showed that pellets are no longer economical, besides needing more cleaning and maintenance, so I bought and installed new, larger and more efficient air/air heat pumps.
These have kept the house at 20C in the daytime, 18C at night, and we have only used about 1 1/2 bags of pellets when using the stove for a quick temperature boost on very cold evenings.
Our electricity bill is manageable at about 1600€ for the last year, we save over 200€ a year for pellets, and no longer have the weekly cleaning and hassle of the stove, and shopping around to find acceptable prices.