1. What the battery actually has to carry
The HMW2 page lists the machine with a 48 V mobile battery and carries the remark that the battery is customer provided. The variant without battery states the design more directly: the machine is sold as the machine, and the energy source is a separate decision.
That decision has three questions with answers that are not on the page:
- Which battery chemistry, capacity and C-rate does PowerDe require, so the pack can supply the heater load without cutting out?
- What is the expected run time per charge at the rated 4.5 kW heating power, and at what state of charge does the machine stop working?
- Which charger output is specified, and does a full recharge fit inside the shift break or the overnight window of the site?
Runtime, capacity and charger output are not published for this model. Cleaning capacity per shift follows from those figures, not from the number of cleaning modes, so a written runtime tested at the heating power of the configuration you are buying is the first thing to request, together with the matching charger specification.
Ask the same set of questions for both listing variants. If your record needs one machine with a defined battery and charger, say so in the inquiry instead of choosing one of the two links and hoping the scope is understood.
2. Where the machine physically fits
The HMW2 is described as a driving style, autonomously driven mobile unit with machine dimensions of L1275 mm × W570 mm × H1185 mm. The stated use case is indoor garages and the narrow spaces of outdoor parking areas, and the design intent — stop and drive at any time — matches that setting.
The limitations to confirm are the ones around that envelope:
- What turning width does the machine need in a parking bay, and can it be pulled or pushed manually if the driving function is not usable at a ramp or a step?
- What ramp gradient, floor slope and surface type can it travel on when the bay is wet and soapy?
- Is the equipment rated for the outdoor part of the duty — rain, wash water spray, and cold parking areas in winter?
The product page does not state an ingress protection rating for this model. For a machine that works with tap water inflow and a high pressure water gun in open parking areas, that rating is a normal question and it should be answered in writing.
3. Utilities that must already exist on site
The HMW2 takes tap water through a 4-point internal-tooth inlet fitting, and its cleaning method is a high pressure water gun with a nozzle. The tank is a 60 L clean water tank, and the cleaning modes are hot water, dry steam and wet steam, generated with a PTC semiconductor heater.
Ask what has to be built or adapted before delivery:
- What inlet pressure and flow does the machine expect from the tap-water supply, and is a booster pump or a pressure tank needed at your bay?
- Does the site water need softening or filtration, and what does hard water do to the PTC heater and to the warranty?
- Where does the wash water drain, and which nozzle and lance lengths are included in the delivery?
Steam temperature and steam pressure are not published for the HMW2, and the same is true for the accessories list, weight, hose length and noise level. Buyers who compare machines on those parameters should request them directly rather than assume that machines in the same PowerDe cleaning equipment series behave the same.
4. Duty, service life and consumables
The HMW2 is built for continuous movement in a parking or garage environment, with safety functions for leakage, short circuit, high temperature, high voltage, water shortage and high-voltage explosion. Those protections protect the machine and the operator; they do not extend the duty cycle.
The practical limitation to discuss is scale. A fleet wash bay, an airport apron, or a production hall is a different duty profile from a garage with a few bays. Ask whether the 4.5 kW heating stage and the 60 L tank are the right size for your daily vehicle count, and if not, which other machine in the PowerDe cleaning equipment series fits the duty. If the required steam temperature, steam pressure, or a different working voltage sits outside the 48 V battery design, the supplier's engineering services — hardware testing, product development and customized solutions — are where that gap is settled.
For this machine family, ask for the spare-parts list with prices, the service arrangement covering your region, and the replacement interval and cost of the heater element and seals. For a battery pack, service life is usually quoted in years and charge cycles; get those figures in writing.
5. Documentation, standards and total cost
Ask which declarations and certificates come with the machine and in which language, because import and workplace-safety review usually stalls on paperwork rather than on hardware. Confirm what training is included at delivery, what the warranty covers for the heater and for the battery, and whether that position changes if you supply the pack yourself.
Then price the machine as an installed system: battery and charger, any water treatment or booster pump, the lance and nozzle set, spare consumables, and freight to your site. For the no-battery variant, the battery is a cost you carry yourself, and it is the main difference between the two quoted prices.
A short list to send with the inquiry
- Battery: capacity, chemistry, runtime per charge at the rated heating power, charger output and recharge time.
- Site fit: turning width, ramp gradient, IP rating, permitted ambient temperature range.
- Utilities: inlet pressure and flow, water quality requirement, drainage expectation.
- Performance: steam temperature, steam pressure, water consumption per hour, included nozzles and lance length.
- Compliance and support: declarations, certificates, warranty terms for heater and battery, spare-parts prices, regional service.
Send those questions with your bay layout and your daily vehicle count to Shenzhen PowerDe Automation Precision Equipment. A supplier that answers them with figures and documents has the machine you can put into service; a supplier that answers with the word "standard" has a risk you will pay for later.
