Can Solar Actually Cut Your SCE, PG&E, or SDG&E Bill? Yes — But the Timing Determines How Much

Can Solar Actually Cut Your SCE, PG&E, or SDG&E Bill? Yes — But the Timing Determines How Much

If you've spent any time researching solar in California, you've probably seen claims that solar can cut your electric bill by 70%, 80%, or even eliminate it entirely. You've also probably wondered: is that actually true? And if so, why doesn't everyone have solar already?
The short answer: yes, solar can cut your California utility bill significantly. But the timing of when solar energy is generated versus when your household uses electricity — and when the utility charges its highest rates — determines how large those savings actually are. Here's what determines the real savings for SCE, PG&E, and SDG&E customers, and why batteries are what make those savings as large as they can be.

Why California Utilities Are Both the Problem and the Context

SCE, PG&E, and SDG&E charge some of the highest residential electricity rates in the country. For Southern California homeowners on SCE service, the combination of tiered usage rates and time-of-use pricing means that a heavy-consumption household can pay $0.55/kWh or more during peak evening hours — compared to a national average of around $0.14/kWh.
That rate gap is what makes solar economically compelling in California where it might be marginal in, say, Louisiana. Every kilowatt-hour of electricity you generate yourself and consume on-site is a kilowatt-hour you're not buying from SCE at those rates. The math can be dramatic. But the timing matters enormously.

Solar Generation vs. Household Consumption: The Gap

Here's the fundamental timing mismatch that every California solar homeowner needs to understand:

Solar panels generate the most electricity between 10 AM and 3 PM — when the sun is high in the sky and irradiance is strongest. Most California households consume the most electricity between 4 PM and 9 PM — when residents return home, cook dinner, run appliances, and run air conditioning against residual afternoon heat. That gap — between when solar generates and when households consume — is the central challenge of California solar economics. Under SCE's time-of-use rate structure, the hours when solar isn't generating (evening) are exactly when electricity is most expensive. For a solar-only system, this gap is partially bridged by NEM credits — the credits your utility provides for excess solar power you export to the grid. Under the old NEM 2.0 rules, those credits were generous enough to offset most evening purchases. Under NEM 3.0, the export credits are far smaller, leaving a wider gap between what you earned during the day and what you pay in the evening.

How SCE's Rate Structure Affects Your Solar Savings

SCE's TOU-D-PRIME rate — the default rate for new NEM 3.0 customers — divides the day into three pricing tiers:

Super off-peak: Lowest rates, typically overnight and early morning. This is when you want to draw grid power if you need it.

Off-peak: Mid-range rates during most of the day. This is when your solar is generating and covering your loads.

Peak: Highest rates, 4 PM to 9 PM daily. This is when you absolutely don't want to be buying from SCE.

A solar-only system cuts your off-peak consumption significantly — you're generating during those hours and using what you generate. But it does almost nothing to reduce your peak-hour bill without a battery.
A solar-plus-battery system cuts your peak-hour consumption dramatically — your battery, charged by afternoon solar generation, powers your home through the 4–9 PM window. That's where the biggest savings live.

Real Bill Impact by Utility

The specific savings calculations vary by utility because SCE, PG&E, and SDG&E have different rate structures, different fixed charges, and different net billing implementation details. But the directional picture is consistent:

-SCE customers in Ventura County and Southern California: Peak rates make evening battery dispatch highly valuable. A properly sized solar-plus-battery system on SCE can realistically cut total bills by 60–80%.

-PG&E customers in Northern and Central California: Similar time-of-use structure with slightly different rates by zone. Battery economics are strong, particularly in hotter inland areas with high cooling loads.

-SDG&E customers in San Diego: SDG&E has historically had the highest residential rates in the country. Solar-plus-battery economics are exceptionally strong for SDG&E customers, with savings potential among the highest in the state.

The "Eliminate Your Bill Entirely" Question

Can solar actually eliminate your electricity bill? In some cases, yes — but the conditions are specific. A household that is very energy-efficient, has a large solar array relative to consumption, has a battery that covers evening loads, and has minimized or eliminated the fixed grid charge exposure (through income-based programs) can achieve true-up bills near zero. For most California households, "near zero" is more realistic than "zero" — because fixed charges remain regardless of solar production, and occasional high-consumption days or cloudy stretches will involve some grid purchases. But a bill of $10–30/month — down from $200–350 — represents a 90%+ reduction that is genuinely achievable with the right system design.

The Timing of When You Go Solar Also Matters

The rules have changed three times in recent years (NEM 1.0, NEM 2.0, and now NEM 3.0), and they will likely change again. Current program terms — including TPO program pricing, utility incentives, and net billing structures — are in place now and will evolve.
Homeowners who enrolled in NEM 2.0 programs before April 2023 grandfathered those better terms for 20 years. Homeowners who go solar today under NEM 3.0 with batteries are positioned well for the current environment — and may find themselves advantaged relative to homeowners who wait for hypothetical future improvements.

Visit https://myhomesolution.org/southern-california-edison-net-billing to understand how SCE's specific net billing rate plan applies to your home and what the real savings potential looks like for your household. My Home & Solar Solutions will evaluate your actual bill and usage data — not a generic estimate — to give you an honest projection.

The savings are real. The timing determines how much. Let's figure out your number.