The question
Aaron is 38, works as a senior scientist at a biotech firm in Torrey Pines Mesa, and drives 15,000 miles a year: the daily commute from Carmel Valley to the Torrey Pines corporate corridor, weekend surfing trips to Del Mar and La Jolla, and occasional weekend runs up to LA. His 2016 Honda CR-V has 128,000 miles and needs replacement. He's driven Hondas since college, trusts the brand, and wants to stay with it. The natural upgrade path is either the Passport (mid-size SUV, the Honda he'd have bought five years ago) or the new Prologue — Honda's first serious EV entry, launched 2024.
California offers Aaron very little on the direct-incentive side. The Clean Vehicle Rebate Project (CVRP) that once provided $2,000–$7,500 to general-market EV buyers stopped accepting new applications in late 2023; funding transitioned to income-qualified programs like Clean Cars 4 All, which Aaron doesn't qualify for at biotech senior scientist income levels. The federal $7,500 credit expired September 30, 2025. There is no state or federal purchase-side incentive available for this transaction.
What California does have is genuinely unusual utility rate design. San Diego gasoline is $5.69 per gallon (AAA verified, 2026-Q3) — the highest in our case study library, driven partly by California's cap-and-trade fuel program and partly by ongoing global supply pressure. SDG&E's EV-TOU-5 residential rate structure has one of the most aggressive Super Off-Peak windows in the U.S.: 12.3¢/kWh blended annual average for the midnight–6 AM overnight window and the 10 AM–2 PM midday window (weekdays), with weekends running Super Off-Peak from midnight straight through 2 PM.
Does Honda's first EV make sense against the traditional Honda upgrade, on math alone, without any state or federal purchase support?
The vehicles
GASOLINE
2025 Honda Passport TrailSport AWD
$47,700
ELECTRIC
2025 Honda Prologue EX AWD
$50,400
The 5-year math
| PASSPORT TRAILSPORT (gas) | PROLOGUE EX AWD | |
|---|---|---|
| MSRP | $47,700 | $50,400 |
| Depreciation (5-yr loss) | $19,534 | $28,037 |
| Fuel or electricity (5-yr) | $21,338 gasoline ✓ | $4,572 SDG&E EV-TOU-5 ✓ |
| Insurance (5-yr) | $8,250 | $9,500 EV + California premium |
| Maintenance (5-yr) | $3,500 | $2,500 |
| State incentive | — | $0 (CVRP closed to market-rate) |
| Federal incentive | — | $0 (expired 09/30/2025) |
| 5-year true cost to own | $52,622 | $44,609 |
| Difference | Honda Prologue wins by $8,012 — California's $5.69/gal gasoline and SDG&E's 12.3¢/kWh Super Off-Peak rate carry the outcome | |
Assumptions: San Diego regular gasoline at $5.69/gal ✓ (AAA verified 2026-08-22; California gasoline has been consistently elevated through 2026 due to global supply pressure per San Diego Union Tribune reporting). SDG&E EV-TOU-5 rate: Super Off-Peak at 13.1¢/kWh summer (June–October) and 11.7¢/kWh winter (November–May) plus $24/month fixed fee, verified from SDG&E published August 2026 rate schedule; assumes 100% Super Off-Peak charging discipline. Depreciation from Drive Economics's market-observed retention models; Passport 10%/yr reflects Honda's strong resale performance across all segments (Honda badge retention is among the best in the industry, second only to Toyota); Prologue 15%/yr reflects new-model EV uncertainty with reference to Chevy Blazer EV's observed 2024-2025 retention curve (Prologue shares the GM BEV3 platform under Honda-GM joint venture and depreciates similarly to its Chevrolet twin). Insurance from density-and-MSRP model for Carmel Valley ZIP 92130 with California premium adjustment applied; California auto insurance runs above national average due to dense metropolitan risk pools. Maintenance from make and category baselines with EV multiplier applied. Federal EV credit is zero (expired September 30, 2025). California Clean Vehicle Rebate Project (CVRP) is not accepting new applications from general-market buyers; funding transitioned to income-qualified programs (Clean Cars 4 All) that Aaron does not qualify for. Charger installation excluded (assumes home 240V setup already available). See methodology.
The verdict
The Honda Prologue wins by $8,012 over 5 years against the Honda Passport TrailSport. Decomposition tells a specific story about San Diego as an EV market:
Aaron saves $16,766 in fuel cost over five years — $21,338 in Passport gasoline against $4,572 in Prologue electricity (including the $1,440 SDG&E fixed fee over 5 years). That single line item is more than double the entire verdict differential. San Diego's $5.69/gal gasoline is 44% higher than the U.S. national average, and Prologue's 34 kWh/100mi efficiency combined with SDG&E's 12.3¢/kWh Super Off-Peak rate produces electricity cost equivalent to running gas at roughly 73 cents per gallon. That is not a typo. The California fuel differential is genuinely that extreme.
What eats into that advantage is the depreciation gap and California's insurance premium. The Prologue's $2,700 MSRP premium plus its higher assumed depreciation rate (15%/yr for a new-model EV vs. 10%/yr for Honda's bulletproof Passport retention) produces $8,503 more in 5-year depreciation. California's EV insurance premium adds another $1,250. Total capital cost disadvantage: $9,753. But the fuel differential covers that with nearly $7,000 to spare, and maintenance savings ($1,000) close most of the remaining gap.
The Honda-GM joint venture is worth naming explicitly. The Prologue is not an in-house Honda design. It sits on the same GM BEV3 platform as the Chevrolet Blazer EV, built at the same GM assembly plant in Ramos Arizpe, Mexico. The Blazer EV LT AWD starts at roughly $45,000 — approximately $5,400 less than the Prologue EX AWD. Same platform, same battery, same drivetrain, similar interior dimensions. For Honda's badging and dealer network, buyers pay a premium of roughly $3,700 over five years vs. buying the mechanically-equivalent Blazer EV. That premium is genuinely worth it for Honda loyalists (dealer network, brand trust, warranty familiarity, resale marketability) — but it should be a conscious choice, not an accidental one.
The broader library pattern. San Diego is now the fifth case study in our library where the EV wins without any state or federal purchase-side credit (Detroit Mach-E, Phoenix Equinox EV, Miami Equinox EV, Boulder Rivian R1T, San Diego Prologue). Each of the five relies on aggressive utility rate design plus at least one other favorable factor: Detroit combines DTE's Overnight Savers ($0.1174/kWh) with $4.23/gal gas. Phoenix uses SRP's $0.045/kWh super off-peak. Miami leverages FPL's essentially-free EVolution Home subscription plus $3.94/gal gas. Boulder combines Xcel EV Accelerate ($0.03/kWh effective) with $4.33/gal gas and a decisive Rivian-to-F-150-Platinum trim comparison. San Diego stacks SDG&E's $0.123/kWh Super Off-Peak with $5.69/gal gas — the highest fuel price of any market in the library. In every case, the utility program is doing work that state policy either isn't doing or has stopped doing.
For Aaron in Carmel Valley, the recommendation is clear: the Prologue makes financial sense in San Diego, but the recommendation comes with a specific behavioral prerequisite. He must enroll in SDG&E's EV-TOU-5 rate (not the standard tiered residential rate), and he must charge exclusively during the Super Off-Peak windows. Anything less than disciplined off-peak charging erodes the win rapidly. This is not a "set and forget" utility rate. It requires deliberate scheduling of charging around the peak avoidance windows, or use of a smart charger that handles the timing automatically.
What could change this
- Charging outside Super Off-Peak windows destroys the case rapidly. SDG&E's EV-TOU-5 rate has a 6× price spread between Super Off-Peak (12.3¢/kWh blended) and Summer On-Peak (80.3¢/kWh) — the largest utility rate spread in our library. If Aaron charges 20% of his annual kWh during peak hours, 5-year electricity rises to about $7,830 and the Prologue advantage compresses to $5,346. If he charges primarily during standard Off-Peak windows (50.6¢/kWh summer), the case collapses entirely. This rate structure rewards discipline and severely punishes casual charging behavior in a way that softer TOU rates in other utilities do not.
- Skipping EV-TOU-5 enrollment entirely essentially ties the case. SDG&E's standard tiered residential rate runs roughly $0.45/kWh blended for typical residential consumption. On standard residential, 5-year Prologue electricity would be about $11,475 rather than $4,572 — the Prologue advantage compresses to about $1,100. Any San Diego EV analysis that doesn't assume EV-TOU-5 enrollment substantially overstates the EV case; conversely, EV owners who fail to enroll in the EV rate significantly understate their savings potential.
- Federal $7,500 credit reinstatement produces a landslide. If the federal EV credit returns — through legislation, executive action, or industry-specific policy — the Prologue advantage grows to $15,512 over 5 years. Combined with California's existing utility program advantages, this would put the Prologue in genuinely dominant winning territory rather than utility-dependent territory.
- Chevy Blazer EV comparison quantifies the Honda badge premium. The Prologue is Honda-badged Chevy Blazer EV under Honda-GM joint venture. Buying the Blazer EV LT AWD (~$45,000) instead of the Prologue EX AWD ($50,400) would save roughly $3,700 over 5 years — the effective Honda badge premium net of retention differences. For Honda loyalists, this is a fair price to pay for dealer network familiarity, warranty confidence, and brand marketability at resale. For badge-agnostic buyers, the Blazer EV delivers essentially the same product for less.
- Higher mileage substantially widens the advantage. At 18,000 mi/yr the Prologue wins by $11,653. At 22,000 mi/yr the advantage grows to $16,507. California's extreme gasoline differential means fuel-heavy driving profiles capture disproportionate value from electrification. Long-commute households, rideshare drivers, and multi-vehicle families where the Prologue absorbs high-mileage duty get much more from the switch than typical urban drivers.
- Prologue retention is the largest single unknown. Our 15%/yr depreciation assumption reflects new-model uncertainty for a vehicle launched in 2024 with GM-derived architecture. If Honda's badge retention advantage carries over to the Prologue (12%/yr, closer to Toyota bZ4X but with Honda pedigree), the advantage widens to $12,247. If Prologue depreciation runs closer to typical new-EV levels (18%/yr, similar to Chevy Bolt EUV's observed post-recall trajectory), the advantage compresses to $4,334. Retention performance over the next 24–36 months will clarify which trajectory this vehicle follows.
Run this comparison for your specific situation
Aaron's numbers are one Carmel Valley household at 15,000 miles per year on SDG&E EV-TOU-5. Your ZIP, your mileage, your utility enrollment discipline, and — critically — whether you're shopping in California or a lower-gas-price state all shift the math substantially. San Diego's combination of extreme gas prices and aggressive utility rates is not typical.