The owner would be the landlord, there is no benefit to them installing solar panels unless it increases the rental value to pay for them, it likely doesn't. Solar panels don't add value to a house and may decrease it. [1] Also there limits solar panel installations in conservation areas in UK and your roof can face the wrong way, so they are not efficient particularly.
Rates for new installations are much lower. Complicated to work it out, but seem to be around 4p/kwh. Also, the landlord would not benefit from any feed in tariff as the tenant pays the electric bill and would receive any feed in tariff benefit.
I rented a house in the UK which had solar panels but we never received any money from the electricity generated with it(I knew that's the deal going in, but still).
My HOA doesn't allow it or I'd have them already. And there is no way to fix this because the way the HOA is set up, it is impossible to get a quorum to change it.
Assuming you're in the US due to the relative popularity of HOAs there, this has thankfully been blocked in some (particularly sunny) states. At least California, Texas, Florida, and a few others have solar access laws that prohibit HOA restrictions on solar panel installations. It's worth making sure your state doesn't have a similar policy.
[1] https://www.which.co.uk/news/2017/07/do-solar-panels-affect-...