Quit comparing yourself. 

Anyone who is crazy high or crazy low compared to the others needs to be looked at carefully. 

For context, 4 adults and all our tech living here, we were running about $250/mo on average per month for electricity anyway... outside of summer a/c useage. so all in all, its saved me about $2k a year if i had to guesstimate for you (it stays hot here through October usually).i still owe about $23k on mine, have no intentions of selling the house. but if i decide to move out and rent the whole house out, our market would support higher rent in exchange for no electricity bill. i think you just need to decide what YOUR main benefit of having the panels are. for me it was for the house-hack, and consistent billing, despite the usage. if its strictly for property value increase, i'm not sure it would be worth it, pending your specific market. 

@Ben Berg with renting rates, roommates or a straight rental, you always look at comps, or comparable homes.

Loopnet any deal older than 12 months, Tax GIS consistently late or 6 months past due, any property that changed hands thru probate after 12 months, Texas property tax sales land only not at auction just offlist properties, etc7.

To what extent does landscaping typically add value to a property for the purposes of appraisal and re-financing, compared to other improvements? 

How are you comparing the cost of a new build to one with an existing duplex?

The city's appreciation, vacancy rate, cap rates are truly unparalleled when compared to the other markets you’ve mentioned.

How consistently has it show that it can be profitable. 

Yes, the credit utilization ratio does impact your scores (see below) but, if you're out of debt & not using your credit cards, you may not see a hit to your scores.Amounts Owed (30%): Represents your credit utilization or how much debt you owe compared to your credit limits.