Geewizard wrote:
I'm wondering if putting money into another solar panel and an additional 100 Ah battery to run the existing furnace might be the better solution.
Although the existing furnace is noisy and inefficient, it is already installed and forces heat into the basement to keep the tanks from freezing. Keeping the basement tanks warm is something that none of the other alternatives will do.
One alternative...that we have done...run the BH while you are awake to save battery. Run the furnace at night.
We carry a BH for backup (after a VERY cold weekend with no furnace!).
The BH is inexpensive and pretty safe, but I still won't sleep with it running...