Start from the duty, not the model
Write the job in four parts before comparing any machine: the deposit named as a substance, the surface carrying it, how the operator reaches that surface, and the time window that includes isolation, cooling, cleaning, drying and return to service. "Degrease the machine" is not a duty. "Remove the film left where cutting fluid has dried on a cast machine cover, inside a 40-minute release window on the day shift, without wetting the drive enclosure" is.
The product page for this machine documents its own duty set: vehicle exterior cleaning at fuelling and parking sites, interior vacuuming and disinfection, and engine-compartment cleaning. If the job in front of you falls outside that set, the evaluation is not about whether the machine is good. It is about whether the application can be agreed as a written custom scope with the manufacturer before purchase.
What the fixed form of the machine changes
A fixed unit is a station, and a station is worth building when the cleaning happens at one repeatable place, with a defined approach and utilities that do not have to be re-laid every shift. The published figures that shape that decision here are the enclosure footprint — 1,200 × 800 × 1,200 mm including handles — an 80 L tank in SUS304, and a 220 V working voltage. Each of those three belongs on a site sheet rather than in a comparison table: the footprint against door widths, aisle clearances and the parking position; the tank against the length of the run you expect between refills; the voltage against the circuit the machine will actually be plugged into.
Where cleaning moves between positions, a fixed bay adds travel, cable management and repeated setup at every move. The Cleaning Equipment Series lists driving-style and hand-pushed machines alongside the fixed units, described for indoor garages and narrow outdoor parking spaces, and several of those listings are offered both with and without a battery. That battery option is a site decision rather than a preference: wherever the unit parks, that is where the power question has to be answered.
Read the published parameters against the site
The detail page lists a 6 kW heating load and a tap-water inlet with a 4-point internal-tooth fitting (1/2 inch). Those two lines generate three site questions, and each one has to be answered by someone with authority over the building rather than by whoever is reading the specification:
The page also lists dry steam and wet steam selection and an integrated vacuum cleaner. Treat those two as the operator's control over wetting. Around electrical components, joints and anything that must not stay damp, dry steam with a wipe-down is one technique; wet steam is the technique for loosening a heavy deposit on a surface that can dry. What a buyer should require is not a claim but a trial in which dwell time, nozzle distance, pass count and the condition of the surface afterwards are written down, so that two operators can reach the same result on the same surface.
Ask for the protections by name
The product page lists leakage, short-circuit, high-temperature, high-voltage, water-shortage and high-voltage-explosion protection. Ask for each of those by name, and ask what each one actually does: which of them stop the machine and which only warn, and what the operator does after one trips. A protection list is not a substitute for an operating procedure, and a safety case that rests on a list of feature names does not survive an audit.
The same rigour applies across the PowerDe cleaning equipment range: ask the manufacturer to state which figures are published for the exact variant you are buying. Some listings publish temperature, pressure and tank details; others do not publish steam temperature, pressure, battery capacity, runtime, hose and wand lengths or weight. Where a figure is absent, make it a written question. Do not borrow it from a neighbouring model.
Documented scope or custom scope
Before an order, get one sentence in writing that names your application. If the application already appears on the product page, that sentence is short. If it does not, the purchase has to carry an agreed custom scope covering the duty cycle the machine will actually run, hose and wand lengths that reach the surfaces you have listed, spares and wear parts, regional service response, and what happens to the warranty when the machine is used outside its documented use.
Where equipment has to be built around that scope rather than picked from a catalogue, that is a development conversation with the manufacturer; the customized steam cleaning equipment enquiry route is where it starts. The same applies to a fleet operator or contract cleaning business whose requirement is a method their own crews will have to repeat across several sites.
One trial on your own surface, and keep the record
Choose one representative surface you deal with every week. Record before the trial: the deposit, the surface, the time available, the utility route. Record during: mode used, dwell, nozzle distance and angle, number of passes. Record after: what came off, what stayed, how long the surface took to dry, and how many minutes the whole cycle took including preparation and clearing down. One trial like that, on your own work, tells a buyer more than two specification sheets placed side by side, and it produces the number a crew can be scheduled against.
Run a second trial on the worst surface you own rather than the easiest one. The gap between the two is the figure that decides whether a fixed station is the right shape of purchase, or whether the crew needs mobility instead.
After delivery: descaling, consumables, service
Ask at what interval the machine should be descaled for the water at your site and who owns that task, which parts are consumables and how long they take to reach you, and whether the machine can be serviced in your region without being shipped. A fixed steam machine is a heating appliance fed with mains water; the maintenance schedule is a cost line, and a buyer who never asked for it pays for it later in downtime.
The short evaluation list
For an application the product page does not document, read the figures above as the manufacturer's own configuration and treat the trial as the only evidence you made yourself. PowerDe is a Shenzhen-based manufacturer of cleaning and automation equipment; enquiries can be sent through Contact on the site.
