Hawaii time-of-use hours by utility
Every Hawaii electric utility we track with at least one active time-of-use rate plan, with peak and off-peak hours verified against the published tariff. Periods only — no price values.
Every TOU schedule on this page verified since
Utilities in Hawaii
Sorted by number of customers served in Hawaii.
No utilities match those filters.
Resolve any Hawaii ZIP in one call.
Utility + current period + next transition.
FAQ's
-
What are the typical time-of-use on-peak hours in Hawaii?
All 5 TOU plans tou.tools tracks in Hawaii place on-peak hours at 5 PM – 10 PM. Every hour outside the on-peak (and any mid-peak) window is billed as off-peak. Exact boundaries vary by utility and plan — see each utility's schedule above.
-
Which electric utilities in Hawaii offer time-of-use rate plans?
tou.tools tracks 3 Hawaii utilities with at least one active TOU rate plan — 5 active schedules in total. The largest by customers served are Hawaiian Electric, Hawaii Electric Light, and Maui Electric. They span investor-owned utilities. The full list above is sorted by customers served.
-
Do Hawaii time-of-use peak hours apply on weekends?
On the TOU plans we track in Hawaii, on-peak hours apply every day of the week, including weekends (all 5 plans). Many tariffs also treat observed holidays as off-peak; the Days column in each schedule above shows the exact rule.
-
Do Hawaii time-of-use hours change by season?
Not on the plans we track. All 5 TOU plans in Hawaii keep the same period hours year-round. Each schedule above lists its exact season dates.
-
When is the cheapest time to charge an EV in Hawaii?
tou.tools tracks 2 EV-specific rate plans in Hawaii (EV-J and EV-P). On EV time-of-use plans the lowest-cost window is generally the overnight super-off-peak or off-peak period; charging then avoids the on-peak window. See the EV plan schedules for the exact hours.
-
How do I find which Hawaii utility serves a specific address or ZIP code?
tou.tools maps 81 Hawaii ZIP codes to the utilities that serve them. Because service territories can overlap, a ZIP may return more than one candidate utility; supplying a full street address resolves it to a single utility via a geocoded point-in-territory lookup. The REST API and MCP server both return the matching utility and its current TOU period.