Freshwater dock washing removes surface dust, but it leaves salt film, fuel streaks, and organic staining on gelcoat and topsides. Steam cleaning works because the heat lifts those deposits with far less water than a hose, which matters on a hardstand or in a marina with drainage limits. Before buying a machine for this work, buyers should confirm four things about the equipment itself: its cleaning modes, its power source, its mobility on the yard, and its published parameters. Each item below can be put in an enquiry email and answered in writing.
1. Does the machine offer both dry steam and wet steam, and at what settings?
Marine surfaces need two different jobs. Dry steam, with lower free moisture, suits gelcoat, non-skid deck patterns, and areas near electronics where standing water is unwelcome. Wet steam carries more heat into a bonded deposit such as salt crust or fuel residue near the waterline. PowerDe's Fixed Steam Cleaning Machine PowerDe HW02 page lists both dry steam and wet steam modes with a high-pressure water gun and nozzle, plus 160° steam temperature and 0.8 MPa vapor pressure. Ask the supplier to state the steam temperature and pressure for the exact unit you are buying, and confirm which mode their technicians recommend for gelcoat, for antifouled underwater surfaces, and for stainless fittings.
Ask the same question about reach: wand length, hose length, and nozzle types. On a 15-metre hull, a short hose means constant repositioning, and that is where the labour time goes.
2. Where will the machine get power and water on the hardstand or quay?
The HW02 is listed as a 220 V fixed unit with 6 kW heating power, an 80 L SUS304 water tank, and a tap-water inlet with a 4-point internal-tooth joint (1/2 inch). Those figures decide whether it can be used where you work. Check three points at your yard: is there a shore-power outlet within the machine's cable reach at the hull, is a potable tap available with the right thread, and does the yard's electrical supply protect against the moisture a wash-down creates. If your work is mobile — a boatyard with no fixed cleaning point, or hulls moved between sheds — the PowerDe cleaning equipment series also lists driving-style and hand-pushed machines built on 48 V battery supply, so a boatyard can choose battery mobility instead of a mains point. Ask which models ship with a battery and which are quoted without one; PowerDe lists both variants.
3. How is the machine protected, and what does that mean for the operator?
Steam at high temperature and pressure injures people before it damages a hull. The HW02 page lists protection covering leakage, short-circuit, high-temperature, high-voltage, water-shortage and high-voltage-explosion. Take that list and ask two practical questions: what does the machine do when the tank runs low mid-job, and what physical controls stop an operator directing the nozzle at a hand or a colleague. Then write the operator rules before the first job: gloves and eye protection, who is allowed to hold the wand, how the crew stands clear of run-off, and how the deck is protected from slipping.
4. What does the supplier say the machine is for, and what do they not claim?
PowerDe's own product page for the HW02 describes vehicle exterior cleaning at fuelling stations and parking areas, interior vacuuming and disinfection, and engine-compartment cleaning. Yacht and hull work is not written on that page. That gap is not a warning by itself, but it is a reason to ask the supplier to state, in writing, how the machine is to be used on gelcoat, antifouled surfaces, anodes, through-hull fittings, and teak, and what they exclude. Any statement about cleaning effect you cannot get in writing should be treated as unproven, and confirmed on your own boat, on a small area first, before the whole topsides are done.
The same discipline applies to warranty: ask what happens to the warranty if the machine is used on marine surfaces, and get the answer before the order, not after.
5. What water does the machine need, and how is it maintained?
Scale is the usual cause of lost steam output. Ask what water feed the supplier requires for the tank, whether treatment is needed in hard-water coastal areas, and what the service interval is for the heater and pump. Then ask about support: who installs and trains, what response time is committed, and which spares you should hold. PowerDe presents itself as a manufacturer with customization and technical support, so a boatyard can also ask about a configuration matched to its own supply and tank arrangement.
6. What does a single-hull job take in time and labour?
Ask the supplier for run time per tank fill and heater warm-up time, then prove it on one boat. Time a single hull from first pass to dry-down, and compare that figure with the pressure-wash routine your crew runs now. The comparison, not the brochure, tells you whether one machine and one operator per slip is enough, or whether the yard needs a fixed unit at each berth.
Send the six questions above to PowerDe with your yard's power, water, and hull-size details, and ask them to confirm which model and configuration fits before you order. Buyers who want a custom arrangement, or a machine developed to their own yard's conditions, can raise that directly through PowerDe's solutions enquiry route.
