My 2026 Plugin Prius Buyers Regret...

I don't think the Prius transaxle can actually do that- that is, generate enough power to significantly charge the PHEV battery while also driving at highway speed and holding the gas engine to a low RPM all at the same time.

Engine noise during acceleration and hill climbing was always part of the Prius experience. I don't think I would have expected that to go away when they added part-time EV capability to the PHEV model.

Though, I can see where it's a sharper contrast in sound when the PHEV model allows more of your total driving to be done in the quiet EV mode.

Also there's a bit of a "well there's your problem" statement to be made if you aren't regularly plugging the thing in- I don't mean that to be a cheap shot gotcha. But if you paid for that capability, why not take advantage of it?

 

At highway cruise speed, the constantly-running engine is in its efficiency zone - doing more work to fill the battery to use the charge later is a net loss - charge/discharge losses mean you're burning more fuel to fill the battery than it would have cost you to use hybrid mode later.

Battery filling by choice only makes sense efficiency-wise when you would otherwise be running the engine significantly below peak efficiency, so the efficiency gain from taking more engine power outweighs electric charge/discharge losses. .

At low speed, a constantly-running low-loaded engine would be inefficient, so it does make sense to alternate between charging the battery and stopping the engine and using charge - that's the standard hybrid operation.

The speeds where OP would like to use EV are the speeds where you could be slowly building up charge efficiently. With a bigger battery you could run the standard hybrid algorithm on a bigger timescale - rather than alternating once or twice a minute while in town, you could alternate every few hours of driving. But it still wouldn't make sense (efficiency-wise) to fill it up while highway cruising.

So the car doesn't do what OP wants - the aim is to be an efficient hybrid with plug-in ability, not a fuel-powered EV.

New regulations are the reason the Charge mode button went away in America - new CARB rules required that emission measurements are done in the most polluting user-selectable drive mode, which would have meant testing in Charge mode. Charge mode remains available outside North America.

So elsewhere you do retain the option to spend fuel now to avoid running the engine later, but it's not generally the smartest thing to do - if you want to run EV later, you should have filled from wall charge, and be running hybrid now to save charge to run EV later.

 

I get some of the reason they got rid of Charge mode, but I was also mad when I noticed the feature gone. 1) I dont think there would have been much of a EPA change from 2025 to 2026. Hell under the new admin they have been cutting back on allot of the bs letting Dodge and others bring back more v8s. 2) Then you find out that Parts of Canada and Europe that have higher restrictions get that option even on 2026s which rub it in more.lol. Which also adds in the oil type difference between here and there. I have been unable to find out the exact change if its just a switch change or if there is a switch and software change and if that can be put back with Toyota tools. Service people and the main Toyota call centers dont seem to know chit. Hell the lady just read stuff off without really understanding what chg mode was. lol I understand its something that shouldn't be used much, but if others have it I feel cheated. Either way I love the car.. I just have to tuck my head down more getting in.

----The 2025 (formerly known as the Prius Prime) features distinct EPA ratings depending on the trim level, with the base SE model offering superior efficiency and range compared to the heavier XSE trims.

• SE Trim: Rated for 44 miles of all-electric range, 52 MPG combined fuel economy, and 127 MPGe (miles per gallon gasoline equivalent) when operating in combined electric/hybrid mode.
  
  
• XSE and XSE Premium Trims: Rated for 39–40 miles of all-electric range, 48 MPG combined fuel economy, and 114 MPGe
  

---The 2026 Toyota Prius Plug-in Hybrid features EPA ratings that vary by trim level, with the base SE trim offering the highest efficiency and range.

• Electric Range: The SE trim provides an EPA-estimated 44 miles of all-electric range, while the XSE, XSE Premium, and Nightshade Edition trims are rated for 39 miles.
  
  
• MPGe: The SE trim achieves 127 combined MPGe, whereas the higher trims earn 114 combined MPGe
  

 

I didn't say EPA, I said CARB.

The new rules for 2026 added this: