Time-of-use rate shifts punish solar homeowners who cannot afford $10K+ battery storage

As utilities transition from flat-rate electricity pricing to time-of-use (TOU) rates, solar homeowners without battery storage are increasingly penalized. Under TOU rates, electricity is cheapest during midday hours (when solar produces the most) and most expensive during evening peak hours (5 PM to 9 PM, when solar produces nothing). A solar homeowner without a battery exports excess power during the cheap midday window and then buys it back at 2x to 3x the price during the evening peak. The net effect is that TOU rates can reduce the financial value of a solar-only system by 20 to 40% compared to the flat rate the homeowner was on when they decided to go solar. This matters because millions of solar homeowners installed their systems under flat-rate tariffs and made their purchase decision based on flat-rate savings calculations. When the utility transitions to mandatory TOU rates, the homeowner's actual savings drop significantly from what was promised. A homeowner who was told their system would save $2,400 per year might save only $1,500 per year after the TOU switch. Over 25 years, that is a $22,500 difference in expected lifetime savings, an amount that was never disclosed because the installer modeled savings based on the rate structure that existed at the time of sale. The supposed solution is battery storage, but a home battery system (like Tesla Powerwall or Enphase IQ Battery) costs $10,000 to $18,000 installed. For a homeowner who already spent $25,000 on solar, adding a battery brings the total investment to $35,000 to $43,000 and extends the payback period to 12 to 18 years. Battery storage makes the TOU math work, but only for homeowners wealthy enough to afford it. Lower and middle-income homeowners who stretched to afford solar are now stuck in a rate structure that erodes their savings with no affordable way to fix it. This persists because utilities design TOU rate structures to shift costs onto distributed generation customers while appearing to promote efficiency. The midday price trough conveniently coincides with peak solar production, minimizing the value of net-metered solar exports. Utilities argue TOU rates reflect the actual cost of electricity at different times, which is partially true, but the rate design choices (how deep the midday trough, how high the evening peak, how wide the peak window) are heavily influenced by the utility's interest in reducing solar compensation. At the root, the problem exists because rooftop solar and rate design are regulated by the same entity (the state public utility commission) but are treated as independent policy decisions. A PUC can approve aggressive TOU rates in one proceeding and approve solar incentives in another, with no requirement to model how the two interact for the actual homeowner. The homeowner is left to navigate the intersection of two complex regulatory outcomes with no advocate in the process.