| Color | Dark grey body, orange handle |
| Charging voltage / current | 12.6 V / 1.8 A |
| Charging time | 2.5 hours |
| Model | ST-BP2 |
| SKU | ST-BP2 |
| Product type | Cordless robotic pool cleaner (above-ground pools) |
| Power system | Centrifugal pump |
| Motors | Dual brushless motors |
| Total power | 26 W |
| Battery capacity | 5,200 mAh (3S1P, 18650 cells) |
| Runtime | Approx. 110–180 minutes |
| Travel speed | Approx. 18–24 m per minute |
| Water flow rate | 100–120 L per minute |
| Applicable water depth | 0.3–3 m |
| Pool coverage | Above-ground pools up to 120 m² |
| Navigation | Random path |
| Safety features | Wall collision detection, anti-jam protection |
| Return | Automatic return |
| Indicators | LED |
| Debris bin | Detachable |
| Waterproof rating | IPX8 |
| Product dimensions | L350 × W314 × H176 mm |
| Net weight | 3.4 kg / 8.2 lbs |
What the ST-BP2 Cordless Robotic Pool Cleaner Is
The ST-BP2 is a cordless robotic pool cleaner built for above-ground pools: a 26 W centrifugal pump, a 5,200 mAh battery pack and a 3.4 kg body that runs free of any cable, hose or connection to the filtration system. It is rated IPX8 and works at water depths from 0.3 m to 3 m, so the same unit can serve a shallow paddling end and a 3 m deep end without adjustment.
The machine is deliberately narrow in what it claims. It cleans the pool floor of an above-ground pool up to 120 m², turns at the wall when the collision sensor is triggered, and returns when the cycle ends. Wall climbing, waterline scrubbing and chemical dosing are not part of this specification — which is what keeps the machine light, cordless and simple to put in the water.
Cordless Operation: 5,200 mAh and 110 to 180 Minutes
The battery pack is 5,200 mAh, assembled from 18650 cells in a 3S1P configuration and charged at 12.6 V / 1.8 A. A full charge takes about 2.5 hours and returns approximately 110 to 180 minutes of runtime. That window is the practical difference between a cordless floor vacuum and a manual head on a pole on a pole: the machine keeps working while nobody is holding it.
The range is wide because load changes. Leaf litter and sand shorten a cycle; a light maintenance pass on a clean floor extends it. For an installer or a pool shop preparing a quote, the honest way to present it is 110 minutes as the heavy-debris figure and 180 minutes as the light-maintenance figure, rather than promising the top of the range in every pool.
26 W Through a Centrifugal Pump: 100 to 120 L per Minute
Total power is 26 W, delivered through a centrifugal pump driven by dual brushless motors. Water flow rate is 100 to 120 litres per minute. The pump design matters more than the wattage figure: a centrifugal impeller moves a high volume at low head, which suits a flat pool floor where the debris sits, instead of a deep well that needs pressure.
Brushless motors are the reason a 26 W machine can be sealed into an IPX8 body and still run a full cycle — there are no carbon brushes to wear or spark. For a distributor stocking spare parts, that also means the failure points are the battery, the impeller and the seals, not the motor brushes.
Built for Above-Ground Pools up to 120 m²
Above-ground pools are the target, from a 3 m round inflatable to a 120 m² oval with a flat floor. The unit is not tied to a skimmer line, so it works in a pool whose filtration is a cartridge pump, and it does not need a suction-side connection that an above-ground pool may not have. A pool vacuum for above ground pool cleaning does not need the pool pump running at all.
That is why this model is positioned as an above ground pool vacuum rather than a universal cleaner. In an above-ground pool the floor is usually the only large flat surface, the walls are frequently soft-sided, and the water volume is small enough that one machine covers the area in a single cycle. A 120 m² pool at 18 to 24 m per minute of travel is a coverage pattern the machine can complete inside its runtime. Anyone comparing one above ground pool vacuum against another will notice the difference first in the cable: there is none.
Working Depth 0.3 m to 3 m
The applicable water depth is 0.3 m at the shallow end and 3 m at the deep end. Below 0.3 m the machine has too little water to move through; beyond 3 m it is outside the rated window. Both limits are worth stating on a product page, because the most common return reason on pool robots is a buyer using a machine outside its depth or pool-type range.
Depth also affects retrieval. At 3 m the unit is lifted by the handle on a body that weighs 3.4 kg in air, and it is lighter again in the water.
Random Path Navigation, Wall Collision and Anti-Jam
Navigation is a random path, not a mapped grid. The unit travels at approximately 18 to 24 m per minute and changes direction on collision, so coverage builds up over the cycle rather than following a fixed route. Random navigation is the standard approach at this power level: it needs no camera, no mapping sensor and no app, which keeps the unit sealed and the design simple.
Two protections keep the cycle from stalling. Wall collision detection turns the machine away from the pool wall instead of pushing against it. Anti-jam protection recovers the unit when a wheel or brush meets an obstruction, so a folded pool liner or a toy does not end the run.
Automatic Return and the Detachable Debris Bin
At the end of the cycle the machine returns for retrieval, and LED indicators show the working state. The debris bin is detachable: it lifts out of the body for emptying and rinsing, with no bag and no hose to disconnect.
For a pool shop or a service operator, that is the part that decides repeat business. A bin that comes out in one movement and rinses clean in a bucket is a machine the end user will actually run twice a week; a bin that needs tools is one that stays in the shed.
IPX8: What the Rating Covers
The machine is rated IPX8, the waterproof class given in the supplied specification for equipment that works continuously under water. The rating covers the machine body in the pool; the charger and the charging port are used out of the water, and the unit should be dried before charging.
For an importer, IPX8 is the specification line that has to appear on the listing, because it is the first thing a buyer checks when comparing this unit against a cheaper model with an open motor housing.
Travel Speed 18 to 24 m per Minute
At 18 to 24 metres per minute the machine covers a typical above-ground pool floor several times inside one 110 to 180 minute cycle. Speed is also a debris-collection variable: run too fast and the pump has less time over each patch of floor; run too slow and the cycle ends before the far end is reached. The band in the specification is the balance point for a 120 m² pool, not a maximum.
3.4 kg at 350 × 314 × 176 mm
The body measures 350 mm long, 314 mm wide and 176 mm high, and weighs 3.4 kg (8.2 lbs). At that size it stores on a shelf, fits in the boot of a car and can be posted as a single parcel — three things that matter to a distributor selling online rather than through a pool shop counter.
Flat-Bottom Cleaning: the Boundary
The supplied specification describes flat-bottom cleaning for above-ground pools. It does not describe wall climbing, waterline scrubbing or a brush that follows the curve of a soft-sided wall. Saying so plainly protects both sides of the sale: a buyer who needs the waterline cleaned knows to look at a different model, and a buyer who needs the floor cleaned of sand, leaves and silt knows this one does the job without paying for functions the pool does not have.
The same boundary applies to chemistry. The machine collects debris; it does not filter, dose or test the water, and the pool pump still runs its own schedule.
Who Buys the ST-BP2
This is a trade product, and the buyers are the ones who need a floor unit that can be sold, stocked and serviced in volume, which in this category usually means an above ground pool vacuum with a specification sheet the end customer can read:
- above-ground pool dealers who sell the pool and the accessories in one conversation, and need that unit inside an entry-level package.
- Pool shops and service companies that keep one unit on the counter as a demo and hand it to a customer for a first season.
- Online sellers and marketplace vendors who need an above ground pool vacuum with a clean specification sheet, consistent dimensions and a single-parcel carton.
- Distributors and importers building a pool category around one battery platform, where runtime, depth rating and IPX8 are the comparable lines.
- Holiday parks, campsites and small rental properties with several above-ground pools and no fixed cleaning crew.
Specifying an Above Ground Pool Vacuum for Resale
Five lines decide whether a model survives in a catalogue, and all five are on this specification sheet:
- Pool type and size. Above-ground up to 120 m² — the sizing line that decides whether an above ground pool vacuum is the right category at all. If the range goes beyond that, the buyer needs a different model, not a different claim.
- Depth window. 0.3 m to 3 m, stated as a range rather than a single figure.
- Runtime and charge time. 110 to 180 minutes against 2.5 hours; the ratio is what sets the maintenance rhythm for the end user.
- Water handling. 100 to 120 L per minute through a centrifugal pump, with 26 W total power and dual brushless motors.
- Ingress protection and weight. IPX8 and 3.4 kg, because both are quoted back to the end customer at the counter.
Everything else — bin design, LED indicators, automatic return, anti-jam and wall collision behaviour — is what the end user notices in the first month, and none of it needs a number to be useful.
Frequently Asked Questions
What is the ST-BP2 cordless robotic pool cleaner?
It is a battery-powered pool cleaner with a centrifugal pump and dual brushless motors, rated at 26 W total power. The 5,200 mAh battery gives approximately 110 to 180 minutes of runtime, and the unit is rated IPX8 for continuous work underwater.
Which pools is the ST-BP2 built for?
Above-ground pools up to 120 square metres, with an applicable water depth of 0.3 to 3 metres. The supplied specification describes flat-bottom cleaning performance.
How long does the battery last and how long does it take to charge?
Runtime is approximately 110 to 180 minutes on a full charge, and charging takes about 2.5 hours from a 12.6 V / 1.8 A charger. The battery pack is 5,200 mAh, built from 18650 cells in a 3S1P configuration.
How much water does it move?
The centrifugal pump moves 100 to 120 litres per minute, with 26 W of total power driving dual brushless motors.
How fast does it travel and how does it navigate?
Travel speed is approximately 18 to 24 metres per minute. Navigation is a random path, with wall collision detection and anti-jam protection so the unit turns away from the pool wall and recovers when it meets an obstruction.
Does it climb walls or clean the waterline?
No. The supplied specification covers flat-bottom cleaning for above-ground pools, with wall collision detection rather than wall climbing, and no waterline cleaning function is listed.
How do you get the machine out of the pool?
The unit returns automatically at the end of its cycle, and the orange handle on top is used to lift it out. Net weight is 3.4 kg.
How is the debris removed?
The debris bin is detachable, so it lifts out of the body for emptying and rinsing. LED indicators show the machine status.
What does IPX8 mean on this machine?
IPX8 is the waterproof rating given in the supplied specification for a unit that works underwater. It applies to the machine body, not to the charger, which is used out of the water.
What are the dimensions and the weight?
The body measures L350 × W314 × H176 mm and weighs 3.4 kg, or 8.2 lbs.
