Helping Riverside County homeowners navigate SCE rates and solar options since 2020
If you are on a Southern California Edison Time-of-Use plan, the rate you pay per kilowatt-hour is not fixed. It depends entirely on what time you run your dishwasher, charge your EV, or run the air conditioner. Get the timing right and TOU saves you money. Get it wrong and you can pay 58 cents per kWh or more during summer peak hours.
This guide covers every SCE TOU plan available to residential customers in 2026, breaks down exactly when on-peak and off-peak periods apply, and explains which plan costs less based on your household habits. It also covers the NEM 3.0 export credit change and how solar panels combined with the right TOU plan can dramatically cut your bill. For context on where rates are heading, read our SCE rate increases through 2028 guide.
1. What Are SCE TOU Rate Plans and How Do They Work
Standard SCE residential customers are on a tiered rate plan by default. Tiered pricing means you pay one rate per kWh up to a baseline amount (Tier 1), then a higher rate for usage above that baseline (Tier 2). Under this plan, the time of day does not matter.
Time-of-Use plans work differently. Instead of pricing based on total volume consumed, TOU plans price based on when you consume electricity. The grid is most stressed between 4pm and 9pm on weekdays, when homes are occupied and demand peaks. SCE charges more during those hours and less at all other times.
The core structure of every SCE TOU plan:
On-Peak Period
The hours when the grid is most congested and SCE charges the highest rate. On most TOU plans, this is 4pm to 9pm, Monday through Friday. Weekends and holidays use off-peak rates. During summer months (June through September), on-peak rates are higher than winter rates.
Off-Peak Period
All hours outside the on-peak window. Off-peak rates are meaningfully lower than on-peak rates. On some plans, there are "super off-peak" windows with even lower rates, typically between 9pm and 8am or midnight to 9am, which benefit EV owners who charge overnight.
Base Services Charge
As of November 2025 (AB 205), SCE added a fixed monthly Base Services Charge of $24.15 per month. This charge applies to all residential rate plans regardless of usage and cannot be reduced by using less electricity. It is a flat line item that lowers the variable rate slightly in exchange for a guaranteed fixed cost.
SCE offers several TOU plan variants for residential customers. The most common are TOU-D-4-9PM (the standard default TOU option), TOU-D-PRIME (for EV owners with overnight charging), and TOU-D-5-8PM (an older plan with a slightly different peak window). SCE has been enrolling customers in TOU plans as the state pushes toward dynamic pricing under its Clean Energy mandate.
2. Rate Comparison: Tiered vs TOU-D-4-9PM vs Solar PPA
Here is how the three main rate structures compare for a typical Riverside County household. All figures reflect 2026 SCE rate schedules.
The 58 cent on-peak rate is not hypothetical. It is the actual SCE TOU-D-4-9PM rate for summer months. A household running the AC, cooking dinner, and doing laundry between 4pm and 9pm on a hot July evening is paying 58 cents for every kWh consumed during those five hours. If a household uses 15 kWh between 4pm and 9pm on a summer weekday, that single five-hour window costs $8.70 in electricity. Across 22 weekdays in a month, that is $191 just for peak hours.
By comparison, the same 15 kWh consumed at midnight costs 15 kWh x 12 cents = $1.80. The difference in behavior, run the same load at night instead of evening, saves nearly $7 for that single shift. The TOU math is not subtle.
The $24.15 fixed Base Services Charge added in November 2025 under AB 205 changes the calculus for low-usage households. If you use less than 300 kWh per month, the tiered plan may now cost less than TOU because the variable savings from off-peak rates cannot overcome the fixed charge. High-usage households above 700 kWh per month generally benefit more from TOU if they can shift load.
3. Which Plan Saves Money
The right TOU plan depends on two factors: your household's peak-hour usage habits and whether you have flexible loads you can shift.
TOU-D-4-9PM Is Right For You If
- Someone is home during the day (remote workers, retired) and can run appliances before 4pm
- You can run dishwasher, laundry, and pool pump in the morning or after 9pm
- Your thermostat is programmable and you can pre-cool the house before 4pm
- You do not have a high-demand job commute that means you get home at 5pm and immediately run everything
TOU-D-PRIME Is Right For You If
- You own an electric vehicle and charge it overnight, between 9pm and 8am
- You can tolerate a higher on-peak rate in exchange for a dramatically lower overnight rate (~12 cents)
- EV charging costs are a significant portion of your monthly bill
- You have a home battery that you can charge overnight and discharge during the 4-9pm window
Stay on Tiered If
- Your household peaks between 4pm and 9pm regardless of what you do (unavoidable schedule)
- You use less than 300 kWh per month total and cannot benefit from off-peak shifts
- You have no flexible loads (no EV, no smart appliances, no programmable thermostat)
- Every household member gets home between 5pm and 7pm and immediately needs to cook, cool, and run appliances
The honest reality for most Temecula and Murrieta households: the 4pm to 9pm window is exactly when two-income families get home from work. Kids need dinner. AC needs to run. Laundry has been sitting in the hamper all day. The behavioral shift required to fully benefit from TOU is harder than it sounds when your schedule is fixed.
This is one of the reasons solar changes the math so significantly. Solar panels do not require you to change your behavior. They just eliminate most of your exposure to whatever rate SCE charges during daylight hours.
4. How Solar Changes the TOU Math
Solar panels produce power from roughly 8am to 5pm in Riverside County, depending on the season. For TOU-D-4-9PM customers, that means solar covers the first hour of the on-peak window (4pm to 5pm) and all of the daytime off-peak period. Power you generate and consume on-site never goes through your SCE meter at all. You do not pay 58 cents, 34 cents, or any rate for it. It is effectively free electricity.
The math for a 1,000 kWh household on TOU-D-4-9PM:
The critical change NEM 3.0 introduced: solar export credits dropped from about 30 cents per kWh under NEM 2.0 to roughly 5 to 8 cents per kWh today. That makes exporting excess power to the grid much less valuable than it used to be. Under NEM 2.0, a solar system that overproduced could wipe out your entire bill. Under NEM 3.0, that overproduction earns you a fraction of its former value.
The implication: self-consumption is now what makes solar financially strong. If your panels produce power and you consume it directly, you avoid buying that electricity at 34 cents, 42 cents, or 58 cents per kWh. That is a hard dollar saved. If you export it, you get 5 to 8 cents back. The difference is significant.
For homeowners on a TOU plan, solar is especially powerful during spring and fall months when solar production is high and on-peak exposure is real but AC load is lower. During those months a properly sized solar system can drive SCE bills near zero while still covering the $24.15 base services charge. Read our full PPA vs buying solar comparison to see which ownership model works best under NEM 3.0 rules.
See how much solar saves on your specific TOU plan
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5. Battery Storage and Solar Under NEM 3.0 TOU
The combination of solar plus a home battery (like a Tesla Powerwall or Enphase IQ Battery) is where TOU optimization becomes genuinely powerful under NEM 3.0 rules.
Here is the basic cycle on a TOU-D-4-9PM plan with solar and battery:
Solar Production Window
Panels generate power. Household uses what it needs directly (self-consumption avoids SCE rates). Excess charges the home battery.
On-Peak Window (58c/kWh summer)
Battery discharges to power the home. You avoid buying electricity at 58 cents per kWh. Solar continues producing through about 5-6pm depending on season.
Off-Peak Window
If your battery is depleted, this is the cheapest time to draw from SCE. On TOU-D-PRIME, overnight rates reach as low as 12 cents per kWh. This is also the ideal window for EV charging.
This cycle is why NEM 3.0 was specifically designed to incentivize battery storage. Under NEM 2.0, exporting excess solar during the day was highly valuable. Under NEM 3.0, that export value dropped dramatically. The state wants homeowners to store the excess and use it during the evening peak instead of selling it back cheaply and then re-buying it at 58 cents during peak. Adding a battery aligns with exactly what NEM 3.0 was structured to reward.
On the export credit side: even at 5 to 8 cents per kWh, solar exports are not worthless. If your system overproduces during shoulder months (spring and fall), those credits roll forward on your bill and offset future usage. Annual true-up billing means credits accumulate until SCE settles the account once per year. Heavy producers in spring can offset high summer AC costs through this mechanism.
For a deeper look at how the export credit change affects the overall savings calculation, see our SCE rate overview page and the complete rate increase timeline.