Not the person your replied to, but I'm in the same position.

No? Unless you consider an HOA the government. Why would the make this hard? I now quite a few that will subsidize it. Fill in some paperwork, submit it along with the invoice and wait a few weeks/months for some free money back.

No: in Scotland I got a subsidy for the heat pump install capital cost, and I'm on the old feed in tariff scheme that pays me for every unit of energy produced. Including, oddly, energy I consume myself.

It's not so advantageous for new installs because the point of awkwardness in the UK has switched to storage. It's currently possible for some battery owners to make money from arbitrage because the grid hasn't bought enough batteries and north/south links yet.