Your SRP Plan Is Retiring by 2029 — Here's What Happens and What to Do Now
SRP is phasing out most of its legacy residential rate plans by approximately November 2029. If you're on E-13, E-21, E-22, E-23, E-24, or the legacy E-26 solar plan, you're getting automatically moved to a newer plan — one with time-of-use pricing, on-peak windows, and (for solar customers) a much lower export credit.
Why this matters now, not in 2029
The plans customers get moved to have peak windows from 2pm–8pm weekdays. When Arizona cooling loads are highest. Bills can jump 20-40%+ for customers who don't adjust their usage pattern before the switch. Prepping now gives you 18-36 months to shift habits and equipment.
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Which SRP Plans Are Being Retired?
SRP's current residential rate schedule (as of April 2026) still includes legacy plans that are being phased out. The primary plans scheduled for retirement:
| Legacy Plan | Type | Likely Replacement |
|---|---|---|
| E-13 | Basic flat rate | E-21 or E-27 (TOU) |
| E-21 | Residential flat rate | E-27 (TOU) |
| E-22 | Residential demand | E-15 or E-16 |
| E-23 | Residential TOU (legacy) | E-27 |
| E-24 | Residential TOU + demand (legacy) | E-16 |
| E-26 | Customer Generation (legacy solar) | E-28 (Customer Generation) |
Plan details sourced from SRP's residential rate schedule as of April 2026. Exact transition dates and replacement plans may vary — SRP notifies individual customers with specific transition dates.
How to Check What Plan You're On
- Check your monthly SRP bill. Your plan name (like "E-21" or "E-27") appears at the top-right next to your account info.
- Log into My Account on srpnet.com. Navigate to "Price Plan" — your current plan shows there along with projected usage.
- If you see E-27 or E-28, you're already on a current plan and don't need to worry about the transition. These are the plans SRP is keeping.
The Biggest Change: Peak-Hour Pricing
Legacy flat-rate plans (E-13, E-21) charge the same rate for every kWh regardless of when it's used. Current plans like E-27 have a 3x price differencebetween on-peak and off-peak energy:
| Time Window | Summer Rate (approx.) | Winter Rate (approx.) |
|---|---|---|
| On-peak (2-8pm weekdays) | $0.32/kWh | $0.12/kWh |
| Off-peak (all other hours) | $0.11/kWh | $0.08/kWh |
SRP E-27 illustrative rates from SRP's 2026 residential rate schedule. Actual rates vary with the monthly Electric Adjustment Mechanism and seasonal dates. See our full SRP rates guide for the complete breakdown.
If you currently run your AC at 75°F from 4pm–8pm on weekdays in July, that electricity costs the same as midnight usage on E-21. On E-27, those same hours cost roughly 3x more. Without behavior changes, your bill can jump significantly.
For Solar Customers: The E-26 → E-28 Transition
If you're on E-26 (legacy Customer Generation), the transition to E-28 is the most consequential change because of how SRP values exported solar. On E-28, exports are credited at the Export Price Plan rate — approximately 2.8 cents/kWh as of 2026 — while imports during on-peak cost around 32 cents/kWh in summer.
What this means in practice
Every kWh your solar produces and exports earns 2.8 cents. Every kWh your solar produces and you use yourself (or store in a battery for later) saves you 32 cents during peak hours. That's an 11x value difference for self-consumption vs. exporting.
4 Strategies to Protect Your Bill Before the Switch
1. Start Load-Shifting Now (Free)
Before you're forced onto a TOU plan, practice running your high-energy loads outside 2-8pm weekdays. Pool pumps, laundry, dishwasher, EV charging, and pre-cooling your home should all shift to early morning or late evening windows. Our pre-cooling calculator shows exactly how much you can save by cooling your home before peak.
2. Add a Battery (Biggest Long-Term Win)
For homeowners on E-26 or E-21 with rising summer bills, battery storage is the single biggest lever. A battery charges during off-peak hours (11¢/kWh) and discharges during on-peak (32¢/kWh) — that's a 21¢/kWh arbitrage on every stored kWh. For solar customers, it captures production that would otherwise export at 2.8¢ and uses it during peak at 32¢ equivalent value.
See our best home batteries for Arizona guide and the Powerwall payback calculator for the math on your specific situation.
3. Upgrade to a High-Efficiency Heat Pump
If your AC is 10+ years old, upgrading to a SEER2 20+ heat pump cuts summer cooling consumption 20-35% — directly reducing what you pay during the on-peak window. Stack federal, APS, and SRP rebates for up to $4,000 off via our heat pump rebate stacking guide.
4. Install a Smart Thermostat with TOU Scheduling
ecobee and Nest both support time-of-use scheduling that automatically pre-cools your home before peak and lets temperatures drift during peak. Combined with SRP's Cool Rewards demand response program, you can earn bill credits on top of rate savings. See our best smart thermostats for Arizona TOU guide.
Timeline: What to Do and When
Now (2026)
Check your current plan. Log into srpnet.com or check your bill. Start load-shifting habits. Run high-draw appliances before 2pm or after 8pm.
2026-2027 (transition planning)
Evaluate battery storage if you have solar or run heavy on-peak loads. Consider heat pump upgrade if AC is 10+ years old. Stack all available rebates.
2028-2029 (final prep)
SRP will notify you individually of your transition date. Request a plan comparison showing your last 12 months billed under both the legacy plan and your target plan. Adjust final strategy based on actual data.
~November 2029
Legacy plans retire. You're on your new plan. If you prepped correctly, the transition is bill-neutral or positive. If you didn't, expect 20-40%+ summer bill increases.
Related SRP Reading
- SRP TOU rates explained — full breakdown of E-27 on-peak/off-peak pricing
- SRP peak hours schedule — exact windows by season
- SRP demand charges explained . If you're moving to E-15 or E-16
- SRP summer rates start May 1 — what changes at the seasonal switch
Bottom Line
SRP legacy plan retirement is a slow-motion bill shock for customers who don't prepare. The good news: you have 2-3 years to adjust. The best moves — load shifting, battery storage, heat pump upgrades — pay for themselves even on your current plan and position you to come out ahead after the transition. The worst move is waiting until SRP's transition notice arrives and trying to adjust in 60 days.
Frequently Asked Questions
When do SRP legacy rate plans retire?
SRP is phasing out most legacy residential plans (E-13, E-21, E-22, E-23, E-24, E-26) by approximately November 2029. Customers will be automatically transitioned to current plans (E-15, E-16, E-27, or E-28). SRP typically provides several months of advance notice.
What SRP plan will I be switched to?
SRP typically moves legacy customers to comparable current plans: E-13 (flat rate) to E-21 or E-27, E-22 (demand) to E-15 or E-16, E-26 (legacy solar) to E-28. The exact plan depends on your usage profile and solar status. All modern plans have on-peak time-of-use pricing.
Am I losing my grandfathered solar net metering?
E-26 customers transition to E-28. The biggest change is the export credit rate, which on current SRP plans is approximately 2.8 cents/kWh versus ~32 cents/kWh during summer on-peak hours — an 11x difference that heavily favors self-consumption with battery storage.
How do I find out what SRP plan I'm on?
Log into My Account on srpnet.com and check the "Price Plan" section. Your plan name (E-13, E-21, E-27, etc.) also appears on the top-right of your monthly SRP bill. If your plan is a number in the teens or twenties that isn't E-27 or E-28, you're likely on a legacy plan.
What should I do now to prepare?
Four key moves: (1) Identify your current plan today, (2) Review your peak-window usage, (3) Start load-shifting (pre-cool, shift pool pumps, delay laundry/dishwasher/EV charging), (4) Evaluate battery storage, especially if you have solar on E-26.
Disclaimer
Rate plan details and retirement timelines are sourced from SRP's residential rate schedule as of April 2026. Exact transition dates, replacement plan assignments, and rate amounts may change based on SRP regulatory filings and the monthly Electric Adjustment Mechanism. Individual transition timing is set by SRP per customer. Verify your current plan and target plan directly with SRP before making major equipment decisions.