E-21 Residential Super Peak Time-of-Use, 3-6 p.m. (SRP EZ-3)
0.09700–0.36610$/kWh
by time of day and by day of week and by season · plus $30.00 per month · covers the full bill — everything the utility bills for energy - directly comparable to another bundled rate
effective2026-01-01
transcribed2026-08-22
today2026-10-07
Monthly bill
Usage
cheapest hours
most expensive hours
500 kWh
$78.50
$213.05
1,000 kWh
$127.00
$396.10
2,000 kWh
$224.00
$762.20
This plan prices by time of day, so a monthly total alone does not determine the bill. The columns are the bounds: every kWh in the cheapest period, and every kWh in the dearest. A real bill falls between them, and where it falls is what this plan is asking you to change.
Before taxes, franchise fees and any local surcharge.
Provenance
reconciled to a published total
sourceSRP price plan E-21, FY26 ratebook including the Transmission Cost Adjustment effective January 2026
effective2026-01-01
retrieved2026-08-22
regulatorNone - SRP is an Arizona agricultural improvement and power district whose elected board sets prices. There is no commission docket and no filed tariff; the published price plan is the authority.
verifiedTranscribed from the utility's filed sheetSRP price plan E-21, FY26 ratebook including the Transmission Cost Adjustment effective January 2026
verifiedEffective date on the sheet: 2026-01-01
verifiedReconciles to a total the utility published itselfthe Total printed on the same page as the ten components, for every season
verifiedSource document checked daily for changes
excludedTaxes, franchise fees and local surchargesJurisdiction-specific, so they are deliberately not encoded. A bill will be higher than this figure by that amount.
Energy rates
Period
Applies to
$/kWh
May, June, September and October, 3pm to 6pm, weekdays only
all usage
$0.30960
May, June, September and October
all usage
$0.10300
July and August, 3pm to 6pm, weekdays only
all usage
$0.36610
July and August
all usage
$0.10690
January to April, November and December, 3pm to 6pm, weekdays only
all usage
$0.12940
January to April, November and December
all usage
$0.09700
Other plans at this utility
Encoded from the same tariff book, on the same day. Which one
you are on is on your bill; which one you are eligible for is set by the
utility, not by this page.
Transcription notes recorded when this tariff was encoded, including anything deliberately left out.
THE SERVICE CHARGE TIERS ARE NOT USAGE TIERS. Tier 1 $20, Tier 2 $30 and Tier 3 $40 are chosen by dwelling type and service amperage - Tier 1 is an apartment or condominium up to 225 amps, Tier 2 any other dwelling up to 225 amps, Tier 3 anything over 225 amps. Encoded at Tier 2, the ordinary single-family case. A flat or condominium pays $10 a month less and a large-service home $10 more, on identical energy prices.
The minimum bill is the Monthly Service Charge.
SRP HAS NO REGULATOR. It is an Arizona agricultural improvement and power district and its elected board sets prices, so there is no docket, advice letter or filed tariff - the published price plan is the authority. Every other utility in this catalogue has a commission behind it.
Seasons are BILLING CYCLES, not calendar months: summer is the May, June, September and October cycles; summer peak is July and August; winter is November through April.
The fuel adjustment and the transmission cost adjustment are line items INSIDE the printed total, not additions to it. SRP may change either at any time, which is what moves these prices between ratebooks.
A SUPERSEDED COPY OF E-23 STILL FETCHES from a shorter URL and is wrong by up to 12% per kWh. See provenance. The FY26 ratebook is the one encoded and watched.
NOT ENCODED: the Economy Discount Rider (limited income), the Medical Life Support Equipment Discount, the Energy Attribute Certificate Rider, the Renewable Net Metering Rider and the Carbon Reduction Rider. All are elective or eligibility-restricted; none is a mandatory adder.
A VOLUNTARY ALTERNATIVE to E-23, with a very narrow peak: three hours, 3 p.m. to 6 p.m., Monday to Friday, all year.
THE PEAK IS BRUTAL AND THE OFF-PEAK IS CHEAP. In July and August on-peak is $0.3661/kWh against E-23's flat $0.1398 - 2.6 times - while off-peak is $0.1069, below E-23. This plan rewards moving load out of three afternoon hours and punishes failing to.
THE DEFAULT PLAN IS THE MORE EXPENSIVE ONE FOR A FLAT LOAD. At 12,000 kWh a year spread evenly, E-21 bills $1,707 against E-23's $1,781 - the time-of-use plan is $74 a year CHEAPER for a household that does nothing to manage its usage. The peak is only three weekday hours, 8.9% of the week, and E-21's off-peak price is below E-23's flat price in summer peak and winter. The direction reverses sharply for a household concentrated in the window: all 12,000 kWh inside 3-6 p.m. costs $2,805 on E-21 against $1,780 on E-23.
ARIZONA DOES NOT OBSERVE DAYLIGHT SAVING, and the plan is written in Mountain Standard Time, so the 3-6 p.m. window is the same clock hours all year. Utilities in DST states have to shift their periods; this one does not.
HOLIDAYS ARE OFF-PEAK under the plan - New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas, as observed. This engine has no holiday concept, so those six weekdays a year are priced on-peak for their three afternoon hours when they should be off-peak. The effect is at most about $0.7 a year at 1 kWh an hour; it is an overstatement, never an understatement.
Think a figure here is wrong?
Email support@rategrid.dev
with this plan's name and what the filed sheet says. Every rate on this page was
transcribed from the document linked above, so a report that quotes the sheet can
be checked against it and corrected.
Change history
The source document is fetched daily and every version is kept.
Utilities do not publish superseded rates, so this record does not exist
elsewhere once a rate changes.
No changes detected since monitoring began. The source sheet is checked daily.