Shanghai Jastar Industrial Co., Ltd.
Instant · 11 kW · Dual outlet 11,000 W 220 V 30 – 55 °C OEM / ODM

11 kW Instant Electric Water Heater — Dual Shower Outlet, 8 mm² Cable Ready

An 11 kW point-of-use heater built for two outlets. With 11 kW on tap the unit can run two showers at once, and the stainless steel cup element brings water to temperature in about two seconds. Temperature is held between 30–55 °C on the rotary control. No plug — it wires to the 50 A leakage breaker supplied, on ≥ 8 mm² cable.

Model
GB-4
Rated power
11,000 W
Voltage / Frequency
220 V ~ · 50 / 60 Hz
Heating element
Stainless steel cup, 11 kW
Hot water in
≈ 2 seconds
Temperature range
30 – 55 °C
Control
Rotary knob
Power cable
≥ 8 mm² copper core
Power connection
No plug · 50 A leakage breaker supplied
Unit size
200 × 88 × 280 mm
Carton
12 pcs · 645 × 310 × 505 mm · 26 kg

MOQ 100 pcs for custom panel colour, pattern and logo · 1,000 pcs for custom packaging. Samples from 1 pc — the sample price is higher than the bulk price, and we refund the difference once you place a bulk order within 30 days of receiving the sample. Prices are quoted per order, EXW Shanghai — tell us your quantity and destination port and we will reply within one working day.

CE RoHS 100% tested before shipment

Why this model

The highest power in the range

For houses and small guest houses that need two hot-water points from one unit.

11 kW for two outlets

11 kW for two outlets

The largest element in the series. Where an 8.8 kW unit runs one shower comfortably, 11 kW covers a second outlet without a second heater on the wall.

Stable temperature at high flow

Stable temperature at high flow

High power means the outlet holds its setting even when the flow rate is opened up — the usual cause of a cold surprise at peak demand.

Installs across the building

Installs across the building

Bathrooms, staff washrooms, salons and kitchens: the same unit covers any point where hot water is drawn intermittently.

No storage, no scale

No storage, no scale

Nothing is stored, so there is no tank to fill, no sediment to flush and no standby loss. Water and electricity stay separated inside the body.

Specifications

Technical data — GB-4

Every unit is pressure-tested and function-tested before packing. Custom panel finish and power connection available for OEM orders.

Electrical & performance
Rated power11,000 W
Rated voltage220 V ~ · 50 / 60 Hz
Heating elementStainless steel cup, 11 kW
Heating time≈ 2 seconds
Temperature range30 – 55 °C
ControlRotary knob
OutletsTwo shower outlets from one unit
Power cable≥ 8 mm² copper core
Power connectionNo plug · wired direct, 50 A leakage breaker supplied
ProtectionWater–electricity separation · Over-temperature protection · Dry-heat protection · Leakage protection
Waterproof ratingIPX4
CertificationCE · RoHS
Water, dimensions & packing
Unit size200 × 88 × 280 mm
Inner box245 × 105 × 295 mm
Pcs per carton12 pcs
Carton size645 × 310 × 505 mm
Gross weight26 kg
Body colourWhite (custom on request)
LoadingLCL and FCL both available

OEM & ODM

Make it your own brand

We build for importers, wholesalers and own-brand retailers — from a panel colour change to a fully customised product and gift box.

Panel colour, pattern & logo

Body colour and front panel in your colour and pattern, with your logo printed or laser-etched. Artwork proof before mass production.

MOQ 100 pcs

Packaging

Custom printed inner box and master carton, colour or gift box, barcode and retail labelling. Export cartons are drop-tested.

MOQ 1,000 pcs

Power connection

Plug standard (EU / US / UK / AU / Africa) and cable length matched to your market. Shower set included or optional as listed above.

No extra MOQ

Documents & certification

CE and RoHS test reports, product photos, specification sheets and packing lists for your own listings and customs clearance.

Ready to share

Samples & price protection

Test one unit before you commit to a container

Every model is available as a sample, and every price step you reach is paid back to you — the sample itself included.

Samples from 1 pc

Order a single unit to test it, open it up and show your own customers. No minimum quantity, any model in the range, shipped with its CE and RoHS test reports.

MOQ 1 pc

The sample price difference comes back

A single unit is charged above the bulk price, because of one-off handling and air freight. Place a bulk order for the same model within 30 days of receiving the sample and we refund the difference.

30-day rebate

Earlier shipments are rebated too

Our four price tiers — 10–99 / 100–999 / 1,000–9,999 / 10,000+ pcs — are counted cumulatively over the 30 days after you receive the goods. Reach a higher tier and we refund the difference on the units you have already shipped.

Cumulative over 30 days

Tell us which model you want to test and we will send the sample invoice the same working day.

Request a quotation for GB-4

Send us your quantity, destination port and power connection requirements — we will come back with prices and lead time within one working day.

Product Catalog 2026

Browse the full range — instant water heaters, hot water taps and bathroom & desk heaters — in one PDF.