I'm sure that HD store in different regions have varying suppliers of pellets. here in Nor Cal, my local store stocks
BLAZER pellets from Oregon. They are softwood (Douglas Fir) and do produce quite a bit of ash.
Since I don't have to cash this year to buy them in bulk (or a way to transport, since my truck is down) I plan to try a few bags at a time from different suppliers to see if there is anything better available here. The local TSC store carries Lignetics, I believe. I don't like buying there because they store them outside and they are always damp.
My old Trail Blazer stove is a single-fan pressurized firebox design and is probably less efficient than the newer models, but it will run directly on 12VDC. Handy for power failures.