In my opinion, I don't think it is fair to compare a $120 DIY hub to a $20,000 Creston/Control4 system, for a variety of reasons. Hubitat is a DIY product for the most part, so I am not sure if you will find someone to install this for you or maintain it for you.
Hubitat (to paraphrase) recommends this hub not be used for life safety (fire) and security in their Terms of Service, and they have also stated this is not the intended purpose of this product many times in the forum.
There are many threads on this forum regarding HVAC, solar, energy monitoring, and the other items you list. A forum search with those terms, or specific brand names should reveal if Hubitat will work with certain items.
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Here is one example of solar, there are more. [RELEASE] Solaredge Monitoring Device Driver
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One for whole-home monitors, again there are many. [Release] IoTaWatt Power Monitor Driver v0.1.20220103
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The official compatibility list also should be consulted List of Compatible Devices - Hubitat Documentation
Hope this helps you to make your decision!
