Moving this to banter, I installed a 8.5 kw system about the same time you did and also have 1 for 1 net metering. I don't have a minimum charge and have a large credit with the POCO, system generates more power than my family uses on average. The credit was up to $1,200 last summer but the inverter died and was replaced (under warranty) and lost 2+ months of good generation (August-October). This winter has also been bad, November December and January are usually net negative months, and this February was the lowest generation month I've recorded since install, persistent snow and cold kept the panels covered. I still have 7 panels with some snow on them even now.
I would consider a heat pump but I don't like forced air heating. When the badly designed and installed forced air heat system in my house died 10 years ago, it was replaced with a high efficiency warm water baseboard system. That system operates at less than 130F and could be run off a warm water heat pump some day. But for the now the gas boiler installed 10 year ago has been economical and has operated flawlessly and also provides hot water.