| Attribute | Value |
|---|---|
| Color | Blue-grey body, black base, teal accents |
| Plug type | Cordless body, no plug; charger plug matched to the destination order |
| Voltage | 12.6 V DC charging, charger rated 12.6 V / 1.8 A |
| Charging time | 2.5 hours |
| Model | ST-BX2 |
| SKU | ST-BX2 |
| Product type | Above ground automatic pool cleaner, cordless |
| 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 m – 3 m |
| Pool coverage | Flat-bottom above-ground pools up to 120 m² |
| Navigation | Random path |
| Safety features | Wall collision detection, anti-jam protection |
| Return | Automatic return when the battery runs low |
| Waterproof rating | IPX8 |
| Product dimensions | L350 × W314 × H176 mm |
| Net weight | 3.4 kg (8.2 lbs) |
What the ST-BX2 Above Ground Automatic Pool Cleaner Is
The ST-BX2 is an above ground automatic pool cleaner for flat-bottom pools up to 120 m²: a 26 W centrifugal pump driven by dual brushless motors, a 5,200 mAh lithium battery on 18650 cells, and a body 350 mm long, 314 mm wide and 176 mm high at 3.4 kg. There is no cable to the skimmer and no hose on a pole. It goes into the water, runs a cleaning cycle on its own, returns when the battery runs low, and lifts out by the handle.
Automatic here describes the cycle rather than a control system. Random path navigation covers the floor, wall collision detection turns the unit away from the side, and anti-jam protection keeps the cycle alive when something catches a wheel or the brush. Nothing has to be steered and nothing has to be watched.
Every figure on this page comes from the supplied specification and the product renders. Where the specification is silent, the page says so instead of assuming a category feature applies.
Automatic Means the Cycle, Not the Job
Three behaviours make the cycle self-running. Random path navigation moves the unit across the floor without a route to follow, so coverage comes from time in the water rather than from a plan. Wall collision detection ends the pass when the body meets a side and sends it back across open floor. Anti-jam protection restarts the drive when a wheel or the brush snags on debris or a seam.
At the end of the run the machine returns and parks. On a seasonal pool that is the practical difference between an automatic pool cleaner and a manual vacuum head: the unit is lifted out from one known place, not searched for along the floor.
What automatic does not include is scheduling. There is no timer in the specification, so a cycle is started by putting the unit in the water, and a second cycle is a second placement rather than a programmed repeat.
120 m²: The Number to Check Before Ordering
Pool coverage is stated as flat-bottom above-ground pools up to 120 m², and that figure decides the order more often than any electrical rating. A 24 ft round pool measures about 7.3 m across, which is roughly 42 m² of floor; a 15 × 30 ft oval works out near 42 m²; an 18 × 33 ft oval lands around 55 m². All three sit comfortably inside the rating. A floor around 8 × 15 m is where the 120 m² limit is reached.
The flat-bottom qualifier matters as much as the area. An above-ground pool with a hopper, a deep end or a sloping floor is a different cleaning problem, and the coverage figure here describes a floor at one level. Water depth is separately rated at 0.3 m to 3 m, which covers the shallow and mid-depth above-ground pools this class of machine is built for: a pool vacuum for above ground pool shells holding 1.2 m and 1.5 m of water sits inside both the area and the depth rating.
5,200 mAh on 18650 Cells: Why the Range Runs 110 to 180 Minutes
The pack is 5,200 mAh in a 3S1P arrangement on 18650 cells, charged at 12.6 V / 1.8 A in about 2.5 hours. Runtime is quoted as approximately 110 to 180 minutes, and the width of that range is the honest part of the specification: a floor carrying sand and leaf litter loads the pump harder than a floor on a light maintenance cycle, so the number at the bottom of the range is the one to plan around.
Cell format is worth recording at purchase. 18650 cells are the smaller of the two common formats in cordless pool cleaners, and a 5,200 mAh pack in a 3S1P layout is a single series string, which keeps the charger rating and the pack voltage simple to specify. It also means runtime, not peak power, is what the pack buys: 26 W drawn continuously for up to three hours is a different design decision from a high-draw unit that empties in half the time.
26 W, 100–120 Litres per Minute and Dual Brushless Motors
Three numbers describe the cleaning head and they measure different things. Total power is 26 W, the centrifugal pump moves 100 to 120 litres per minute, and travel speed runs at approximately 18 to 24 metres per minute. Flow is the figure that decides how much debris leaves the floor per pass; speed only decides how quickly the unit reaches the next patch of floor.
The specification names dual brushless motors, and the motor type is worth understanding because it explains the power budget: a brushless design carries no carbon brushes to wear against a commutator, so the same 26 W is spent on moving water rather than on brush friction. On a cordless pool vacuum that runs for up to three hours per charge, that is where the runtime comes from.
176 mm Height and 3.4 kg: Deck Space, Storage and Lifting
The body measures L350 × W314 × H176 mm and weighs 3.4 kg (8.2 lbs). The 176 mm height is the figure that matters on an above-ground pool: the unit sits low enough to work under a deck edge or a top rail without the handle fouling, and the folded handle is the lifting point in and out of the water.
Off season the same dimensions decide storage. A machine this size stacks on a shelf or in a box beside the pool equipment, and the 3.4 kg weight means one person lifts it without a trolley. That is a small point until a dealer is storing fifty units through a winter.
What the Supplied Specification Does Not List
The specification covers the pump, the motors, the battery, the depth rating, the coverage area, the drive behaviour and the dimensions. It lists no app, no remote control, no schedule timer and no mapping. It makes no claim about climbing walls, brushing the waterline or filtering the full volume of a pool. A buyer who needs any of those should confirm it in writing against the model being quoted rather than assume it from another robotic pool vacuum in the same category.
Commercial terms sit outside this page for the same reason. What a buyer pays, how many units an order starts at and how long production takes all belong in a quotation rather than in product copy, and anything on a product page that looks like a promise on those points should be treated as unconfirmed.
Goods-In Checks a Buyer Can Run in Twenty Minutes
Every number the specification states can be checked on arrival with a scale, a tape and a timer, which is what makes a narrow spec sheet useful on a loading dock.
- Weight. 3.4 kg (8.2 lbs) on a scale, dry.
- Footprint. L350 × W314 × H176 mm measured with the handle folded as shipped.
- Charger. Rated 12.6 V / 1.8 A, with a charge from empty landing near 2.5 hours.
- Rating mark. IPX8 present on the housing.
- Runtime. A timed full cycle inside 110 to 180 minutes on a charged pack.
- Cycle behaviour. A wall reached during the run turning the unit back across the floor, and the unit returning when the battery falls low.
Who Buys the ST-BX2
This is a stock item for trade buyers rather than a one-off purchase. Five groups account for most orders:
- Above-ground pool dealers adding an automatic pool vacuum to a package that already includes the pool, the ladder and the cover.
- Pool shops and garden centres stocking a cordless unit through the season, where the 120 m² coverage matches the pools their customers own.
- Distributors and importers placing this cleaner beside suction-side and pressure-side heads and pressure-side heads, where the cordless unit covers the jobs a hose cannot reach.
- Holiday parks, rental villas and small hospitality sites that need the floor cleaned between guests without a technician in the water.
- Online sellers who need a specification narrow enough to answer review questions precisely: weight, height, runtime, charge time and coverage.
Specifying an Above Ground Automatic Pool Cleaner for Resale
Five lines settle most resale specifications for this model, and all five are in the table above:
- Coverage. Flat-bottom above-ground pools up to 120 m², which is the first question a retail customer asks when comparing one above ground swimming pool vacuum with another.
- Runtime. 110 to 180 minutes per charge, with 2.5 hours back on the charger at 12.6 V / 1.8 A.
- Flow. 100–120 litres per minute behind a 26 W pump, rather than wattage alone.
- Size. 176 mm high and 3.4 kg, so a customer can lift it and store it without help.
- Scope. Floor only on a flat bottom. No wall climbing, no waterline brushing, no claim of full-pool filtration.
Written on a quotation, those five lines answer the questions that come back after a season starts, and they are the reason this page states the flat-bottom condition and the floor-only scope rather than leaving them to the brochure.
Frequently Asked Questions
What is the ST-BX2 above ground automatic pool cleaner?
It is an above ground automatic pool cleaner for flat-bottom pools up to 120 m2, with a 26 W centrifugal pump, dual brushless motors and a 5,200 mAh battery on 18650 cells. It runs for approximately 110 to 180 minutes per charge, is rated IPX8 and works in water from 0.3 m to 3 m deep.
What size pool does the ST-BX2 cover?
Flat-bottom above-ground pools up to 120 m2. A 24 ft round pool is about 42 m2 of floor, and an 18 by 33 ft oval is around 55 m2, so both sit inside the rating. A floor with a hopper, a deep end or a slope is a different cleaning problem from the flat bottom this figure describes.
How long does one charge last and how long does charging take?
Runtime is approximately 110 to 180 minutes depending on how much debris the floor carries. Charging takes about 2.5 hours at 12.6 V / 1.8 A from the supplied charger.
How much water does the pump move per minute?
The centrifugal pump moves 100 to 120 litres per minute at 26 W total power, driven by dual brushless motors. Flow rate is the figure that decides how much debris leaves the floor per pass.
Does the ST-BX2 climb walls or clean the waterline?
No. The supplied specification describes automatic floor cleaning on a flat bottom, with random path navigation, wall collision detection and anti-jam protection. It makes no claim about climbing walls, brushing the waterline or filtering the full volume of the pool.
How does the machine move around the pool?
Random path navigation at approximately 18 to 24 metres per minute. Wall collision detection turns the unit back across the floor when it reaches a side, and anti-jam protection keeps the cycle running when a wheel or the brush meets an obstruction.
What happens when the battery runs low?
The unit returns and parks automatically, so it can be lifted out by the handle without being searched for along the pool floor.
What are the dimensions and the weight?
L350 x W314 x H176 mm at 3.4 kg (8.2 lbs), with a blue-grey body, black base and a teal control button on the carbon-pattern handle.
What plug type and voltage does the ST-BX2 use?
The unit itself is cordless and carries no plug on the body. The specification lists a charger rated 12.6 V / 1.8 A for a 2.5 hour charge; the mains input and plug configuration are matched to the destination order and should be confirmed in writing for the market being shipped.
What can a buyer check when the container arrives?
Weight at 3.4 kg, the L350 x W314 x H176 mm footprint with the handle folded, a charger rated 12.6 V / 1.8 A, the IPX8 rating mark on the housing, a charge landing near 2.5 hours, and a timed cycle inside 110 to 180 minutes.
