Start with where the cleaning will actually happen
Before any supplier comparison, write down the physical conditions. Is there a roofed wash bay with a floor drain, or open ground in a parking area? How wide are the aisles, and can a vehicle be driven forward and reversed without a second driver? Is mains water available at the position, or must the machine carry its own tank? Answering these questions rules out whole categories of equipment quickly.
A fixed unit such as the PowerDe HW02 steam cleaner is designed around a stationary position with a 220 V supply and a tap-water inlet, and it carries an 80 L stainless tank to buffer between vehicles. A driving style steam cleaner, by contrast, is built for the situation where the machine must travel along a row of parked vehicles in a garage or a tight outdoor lot. Ask each supplier which of those two jobs their machine is meant to do, and whether the version on offer includes a battery.
Ask how the machine handles heat, pressure and water
Fleet cleaning is dominated by road film, oil mist on engine bays and grease around wheels and chassis components. Cold high-pressure water moves loose dirt but struggles with that bonded film. That is the reason to ask about steam temperature and vapour pressure, not just motor power. On the HW02, for example, the published figures are 160 °C steam temperature and 0.8 MPa vapour pressure from a 6 kW heater, and the machine switches between dry steam and wet steam. Insist that every shortlisted machine states its temperature and pressure as measured at the nozzle, and ask how long preheat takes from cold.
Water handling decides throughput. A 50 L tank on a hand-pushed unit and an 80 L tank on a fixed unit mean different stopping patterns across a morning of work, and a fleet of twelve vehicles is a different duty cycle from two. Ask whether the machine runs on tap water, what the inlet fitting is, and how the machine behaves when the tank runs low. On several PowerDe models the published safety list includes water-shortage protection along with leakage, short-circuit, high-temperature and high-voltage protection.
Match the power supply and the mobility to the site, not to the brochure
Ask your electrician what is available at the wash point before looking at heating power. A fixed machine is expected to run from 220 V mains; battery-powered mobile machines work at 48 V and move between bays or along a row of vans. A fleet yard with three bays and one heavy electrical feed is a fixed-machine situation; a depot with vehicles scattered across a rented lot is a mobile-machine situation. Both PowerDe families are offered with and without a battery, which is a specification decision that changes the price and the daily routine, so make sure the quotation states which variant you are being quoted.
Physical size matters more than operators expect. The HW02 measures roughly 1,200 × 800 × 1,200 mm including handles, and the hand-pushed HMW3 measures about 1,150 × 520 × 1,030 mm. Measure the door you will move the machine through, the ramp, and the space behind the wash position.
Questions about the work itself, not the machine
Ask each supplier to describe, in their own words, how their machine is used on vehicle exteriors, interiors and engine compartments. The HW02 product page covers exterior cleaning at petrol stations and car parks, interior vacuuming and disinfection, and engine-compartment cleaning; a supplier who cannot describe the workflow for your vehicle mix is unlikely to support it after delivery. Then ask what is included: hose and wand lengths, nozzles, brush tools, the vacuum function where it is offered, and spare seals and filters.
Ask also about what the cleaning does to the surrounding area. Steam cleaning works with far less water than a hose, which matters where runoff must be contained or where the surface is indoor flooring. If your site has drainage limits, put that in the enquiry and ask the supplier to explain how their machine fits the constraint.
Questions about support, service and the paperwork
Ask which parts wear out and what they cost, how the heater is descaled, and what service interval the manufacturer states. Ask where spare parts ship from and how long a failed heating element takes to replace. Ask for the documentation you may have to show: declaration of conformity, wiring and supply requirements, and instructions in the language your operators read.
Finally ask whether the manufacturer builds to your configuration. Customised steam cleaning equipment enquiries are handled through Shenzhen PowerDe Automation Precision Equipment, which lists equipment development, hardware testing and integration work among its services. If your fleet needs a tank size, a supply voltage or a mounting that differs from the catalogue, that is worth asking about before you commit.
Run the same demonstration on every shortlisted machine
A comparison only holds if the test is the same for each supplier. Pick one dirty vehicle type that represents your worst case — a van with a soiled rear step, a wheel arch caked with grit, an engine bay with oil film — and clean the same panels with each machine. Record preheat time, how many vehicles the tank covers, how far the operator walks, and how much effort the engine bay takes. Those measurements, not the brochure numbers, are what justify the purchase order.
If you want the specification questions answered for your fleet, review the cleaning equipment range or contact Shenzhen PowerDe at sales@powerde.net or +86 13023198376.
