Draft · in progress
The savings math: $999–$1,399 vs $3,600+ rooftop add
The honest math on plug-in solar ROI in Utah. Real numbers from Rocky Mountain Power's residential rate, no salesperson optimism.
Last updated 2026-04-24
Page in progress.
The headline math
A 1,200W kit at $1,399 saves roughly $365/year on Utah’s RMP rate. ~3.8 year payback. Then it’s pure savings.
What this isn’t
Not net metering. Not a full home solar replacement. Not going to zero out your bill.
Why a rooftop “1kW add-on” costs $3,600+
(Section coming: rooftop fixed labor + permits + interconnection costs even for small additions; plug-in is the small-add use case rooftop can’t economically serve.)
Rocky Mountain Power’s tier pricing
(Coming: how plug-in keeps you out of the higher RMP tiers, and why that matters more than the offset itself)