I asked this question but would to add the following details.

I am getting substantial subsidies. so the cost is very very low.

I am interested in the resale added value or how to research this information.

Best answer:

Answer by kerry k
Ask the real estate agents in your area. For some people, having solar electric panels already installed would be a plus. For others, however, especially if they know little to nothing about them, and are not willing to learn, then they would be a detraction for you. It will really depend on the buyer as to whether the panels are an asset, or a detraction. For myself, I would welcome them.

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