Battery changes where a machine can work, but it does not change what that work costs. In a comparison the battery usually becomes one specification line and the rest of the difference is left out, which is how buyers end up with a unit that stops in the middle of a shift or that needs a second machine because the recharge window falls in the wrong hour. The useful comparison asks four questions in order: what the battery has to do, how long it actually lasts, what happens when it is empty, and what it costs to keep.
Start from the job the battery has to carry
PowerDe lists the PWD01, PWD02 and HMW2 cleaning machines in both battery and non-battery versions, so the same chassis appears twice in a quotation list. The difference is not the cleaning head; it is what the machine can be independent of. A battery carries the drive and the pump, which is why a battery machine can follow a line of machines or park wherever the soil is. Steam heat is the part that stays tied to a supply: the fixed PowerDe HW02 steam cleaner is a 220 V unit with 6 kW of heating power, and no practical battery on a mobile machine replaces that. Ask plainly, in writing, which loads run from the battery on the model being quoted and which still need a cable, then compare the two machines against the same route on your floor.
Compare runtime with the task, not with the number
Runtime figures move with mode, with how often the trigger is pulled and with how far the machine is driven between working positions, and the published pages do not give you those numbers for the mobile range. So measure them on your own work before you compare. Write down how many minutes of real cleaning one shift needs and how much of that is travel. Time the travel separately from the steaming, because a crew that spends part of every hour walking a unit to the next bay is paying for movement, not for cleaning. A machine that covers that walking under its own drive turns the same crew hours into working minutes, and that is the saving a battery is supposed to buy. A crew that works from one position and steams for two minutes at a time is spending battery on a pump, and a bigger pack will not change the result.
Compare the water tank against the runtime, because the smaller of the two decides the work pattern. A unit that runs longer than its tank holds stops for a refill anyway, and the refill walk is time the battery did not save. Hand-pushed units such as the hand-pushed steam cleaning machine listed for machinery and medical cleaning are specified with a 48 V battery, a 4.5 kW PTC heater, a 50 L clean-water tank and dimensions of about 1,150 × 520 × 1,030 mm. Those figures are a starting point for a layout check - can it get through the door, over the threshold, into the lift - and for an energy discussion, not a guarantee of runtime on your mode.
What the battery still cannot make irrelevant
Power. Steam generation, and on most mobile machines the heater as well, needs a supply, so a battery machine parked in the middle of a shop still needs a cable run for heat or a plan for cold work. Water. A mobile unit carries a tank, not a supply, so refill points, hose length and the walk back are part of the comparison. Drainage and run-off. A battery changes nothing about where the released soil goes; a shop with no collection has to work with dry steam, cloths and a container whatever the machine is. Access and storage. A battery machine needs a charging position, an overnight place to stand, and a route that takes it to the job. Compare the two machines against your doors, ramps and aisles, and compare the charge position against your shift pattern; a machine that charges during the quiet hours is a different decision from one that has to be watched while the shop runs.
Compare the risk and the replacement, not just the price
A battery pack is a wear item and a failure point, and it is the part that most often leaves a machine out of service. Put these questions to the supplier and expect them in writing: the warranty period for the pack and what is treated as normal wear; whether the pack is replaceable in your workshop or has to be returned; the lead time and the price for a replacement pack; how the charger is protected against a wrong supply, and what the machine does when the pack is low. The PWD02 listing is published in a battery version and a non-battery version, and its machine page lists leakage, short-circuit, high-temperature, high-voltage and water-shortage protection; ask how those protections interact with a battery fault, because a shutdown that saves the electronics but strands a half-cleaned line is still a stoppage.
Price the pack into the comparison, including the replacement and the charge infrastructure, not only the purchase. A battery machine that has to be replaced in four years costs a second machine; one with a replaceable pack and a serviceable charger is a different case. If the work needs heat at every stop, ask for the non-battery version quoted against the same floor plan. If the work moves between bays and the machine is mostly walking and pumping, ask for the battery version and price the charge position as a real item.
Compare them on one floor, on one day
Take the same job twice: the same area, the same soil, the same crew, the same shift length. For each pass record start time and end time, how far the machine moved, how many refills, whether anyone waited for the machine or the machine waited for the crew, and how wet the floor was when the crew left it. Battery machines win on movement and lose on runtime; fixed and mains-fed machines win on continuous heat and lose on the cable. Those two sentences only mean anything against your own record, and one measured day settles a comparison that a specification sheet cannot.
Before that day, get three numbers from the supplier for the battery model in front of you: what the pack powers, what the charger needs from the supply, and how the runtime is measured - at the maximum setting or in the mode you will work in. A comparison built on published figures plus your own trial is defensible; a comparison built on two data sheets side by side is not.
What to send when you ask for the quotation
Send the layout, not the model number: the area to be cleaned each shift, the aisle widths and the doors the machine has to pass, where the water point and the power supply are, the shift pattern and the hours available for charging, and what you do with the run-off now. Say which machine you are holding it against and why, and ask for both versions priced against that description so the comparison stays in the document rather than in a conversation. Shenzhen PowerDe has been building automation and cleaning equipment in Shenzhen since 2007 and lists customised configuration and engineering services, so a measured brief gets a configuration rather than a catalogue choice.
If the trial shows that your real constraint is heat rather than movement, say so in the enquiry; that answer points to a mains-fed unit, and it is cheaper to change the machine now than to change the shift pattern after delivery. Write to sales@powerde.net with the record from your floor, or call +86 13023198376 and ask for the battery and non-battery versions of the PowerDe PWD02 steam cleaner quoted against the description above.
