KT7A Electric Washing Truck TCO: Cost Per Kilometre vs Diesel Street Cleaning Fleets

Municipal fleet decisions are made on total cost of ownership over a fixed budget period, usually 8–10 years, and they are scrutinised publicly. That makes the TCO model — not the purchase price — the document that decides whether an electric washing truck gets approved. The Dongfeng KT7A electric washing truck — CATL 232 kWh LFP, LvKong 164 kW rated / 308 kW peak — is our heavy street-washing platform, and this article builds a complete cost-per-kilometre model for it against a comparable diesel unit, including the two lines municipal buyers most often get wrong.

The Model Parameters

Assumptions used throughout, which you can substitute for your own:

Capital Cost

• Diesel washing truck, comparable specification: USD 78,000–95,000.
• KT7A electric washing truck: FOB USD 72,000–105,000 depending on tank, pump and body specification, plus depot charging equipment allocated at roughly USD 6,000–11,000 per vehicle for a shared DC installation.
• Net capital gap: roughly USD 5,000–18,000 per vehicle before incentives. In markets with zero-emission vehicle incentives or preferential import treatment for electric municipal vehicles, this gap frequently reverses.

Our charging infrastructure capex and financing guide covers how municipalities structure the charger line, including bundling it into the vehicle tender.

Energy Cost

Street washing is an unusually energy-intensive municipal duty because the high-pressure pump runs continuously while the vehicle travels slowly:

The diesel figure is high because a washing truck's engine drives both the vehicle and a high-pressure pump while operating at 10–25 km/h — the least efficient operating point on the engine map. An electric drivetrain has no such penalty, which is why the energy gap here is wider than for an ordinary rigid truck.

Maintenance Cost

This is the line that municipal finance teams routinely understate for diesel and overstate for electric:

• Diesel maintenance: USD 0.16–0.22 per km for a municipal washing truck — engine service, pump drive service, transmission, exhaust aftertreatment, brakes, plus the corrosion and water-ingress issues specific to wet-duty vehicles.
• KT7A maintenance: USD 0.06–0.09 per km — tyres, brakes (greatly extended by regenerative braking), coolant circuit, HV inspection, pump service, and body repairs. There is no engine service, no aftertreatment and no fuel system.
• Annual difference: roughly USD 2,800–3,900 per vehicle.

The full electric maintenance regime is set out in our preventive maintenance schedule, and high-voltage service requirements in HV connector and coolant service.

The Two Lines Municipal Buyers Get Wrong

1. Residual value. Diesel municipal vehicles are increasingly exposed: as low-emission zones expand, a 9-year-old diesel truck has a shrinking buyer pool. An electric truck's residual depends on battery state of health, which is documented and certifiable — see SOH diagnostics and resale certification and used electric truck residual values. We model residual at 18–24% for the KT7A versus 10–15% for the diesel unit; conservative buyers should model them equal and treat any upside as a bonus.
2. Battery replacement risk. The CATL pack is warranted 8 years / 4,500 cycles to 80% SOH. On municipal washing duty — roughly 28,000 km and 250–300 cycles per year — the cycle limit equates to well over 15 years. Treat battery replacement as a zero line inside the 9-year window, and note that warranty and residual risk can be insured where a finance committee requires it.

Consolidated Cost Per Kilometre

Crew cost dominates and does not change, which is why the saving shows as roughly 14% of total rather than the 65% figure that applies to energy alone. Anyone quoting you a headline "60% cheaper" number is comparing energy only.

Non-Financial Benefits That Carry Weight in Municipal Tenders

• Noise. A diesel washing truck at 85–90 dB(A) restricts working hours; the KT7A at 63–70 dB(A) can clean commercial streets before business hours, which is when the work is most effective.
• Air quality. Removes diesel particulate and NOx from the street environment the vehicle is cleaning.
• Policy alignment. Most cities with a climate action plan need credible municipal fleet decarbonisation to report against it.
• Public visibility. Municipal vehicles are seen. A visibly electric fleet has political value that finance committees do occasionally acknowledge.

Jordan and Levant Municipal Deployment

Water scarcity and dust make high-efficiency street washing particularly valuable in the Levant, and municipal depots there have good solar potential for daytime charging. Our Jordan market page covers import, deployment and support for Jordanian municipal operators. Related: Amman construction deployment, Jordan market and policy analysis and Gulf street cleaning operations.

How to Present This to a Finance Committee

1. Show total cost per kilometre, not purchase price.
2. Model residual value conservatively — equal for both vehicles — and let the upside be a bonus.
3. Include the battery warranty as a documented risk mitigation, not an assumption.
4. Add the operational benefits (night working, noise complaints avoided) as a separate qualitative section.
5. Run a sensitivity on diesel price and electricity tariff: the conclusion should hold across the plausible range.

Presenting Sensitivity, Not a Single Number

A TCO model that produces one number invites one question: what if you are wrong? Municipal finance committees are right to ask, and the submission should answer before it is asked. Run at least four sensitivities and present the range.

The conclusion should hold across the full range. If it only holds at the favourable end, the honest answer is to wait or to pilot — and a committee will respect that more than a model that quietly assumes the best case. Where a committee wants explicit treatment of battery risk, warranty and residual risk can be insured, which converts an open question into a priced line.

Ready to electrify your fleet? Contact Shaanxi Fenghan Trading — authorized Dongfeng EV truck exporter. WhatsApp: +86 153 1943 1311 | Email: sales@fenghan-trade.com | dongfengevtrucks.com

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