For Cyprus operators who need more pump than the residential 3-inch range delivers, without stepping up to 11 kW industrial scale — vineyards in Paphos, mid-tier hotels in Limassol, mixed agricultural plots across Larnaca district — the Hybsun 4GPH5.5-120-38 hybrid well pump hits the practical middle of the 4GPH lineup. 5.5 kW of AC/DC hybrid power, delivering up to 38 m³/h flow from boreholes as deep as 120 m. The hybrid controller draws from solar PV (DC 500-780V) during daylight and 380V AC mains backup when sun isn’t available — automatic switching, no battery investment required. Stainless steel construction across the wet end, 2″ outlet for standard borehole fittings, GPRS remote control, intelligent self-cleaning, Child Lock anti-stealing. 2-year warranty.
✓ VAT included · Delivery in Cyprus
What It Is
Cyprus commercial water buyers fall into a pattern: residential 3-inch pumps (300W to 1300W) are too small for serious agricultural or hotel duty, while the 11 kW industrial top of the 4GPH range is more pump than most sites genuinely need. The Hybsun 4GPH5.5-120-38 hybrid well pump fits that middle.
5.5 kW of brushless permanent-magnet motor power · 38 m³/h peak flow · 120 m maximum head · 24 m³/h sustained at the rated 58 m head.
The pump runs as a true AC/DC hybrid — solar PV input via the controller’s MPPT tracking when the sun is producing, and 380V AC mains seamlessly taking over when it isn’t. Cyprus commercial customers get uninterrupted water supply without the cost of battery storage at this power class.
Paphos vineyards needing irrigation at depths 60-90m below ground. Limassol coastal hotels with 50-100 m³/day demand. Larnaca agricultural cooperatives running shared boreholes. Nicosia plain mixed farms drawing 40-60m wells. Famagusta region community supply networks. All within the 4GPH5.5’s operating envelope.
AISI 304 Stainless Steel Construction
The Hybsun 4GPH5.5-120-38 hybrid well pump built with SS oil cylinder, SS outlet, SS connect. The series-standard AISI 304 grade extends through the rest of the wet end (impeller, diffuser, stage casing, jacket, wear ring, strainer).
AISI 304 is the corrosion-resistant grade used in food processing, medical equipment, and marine hardware. For Cyprus boreholes carrying mineral load or sand particles — which is most of them — this is the matched construction tier. Plastic-impeller alternatives like the 3UP series work well for clean groundwater installations at lower power; for 5.5 kW commercial-duty pumping in mineral-rich water, stainless is what delivers years of service instead of routine impeller wear.
The shaft itself is AISI 431 — a slightly higher-grade stainless optimized for rotating-duty loads. The motor sits in an oil-cooled stainless steel jacket.
The Hybsun 4GPH5.5-120-38 hybrid well pump runs a 5.5 kW AC/DC brushless permanent-magnet synchronous motor — same architectural platform Hybsun uses across the 4GPH line, scaled for the mid-tier power class.
Centralized winding (motor coils wound on an automatic winding machine rather than by hand) delivers higher motor efficiency than conventional constructions — typical efficiency improvement is 3-5 percentage points across the operating range.
NSK Japanese-brand industrial bearings handle the continuous-duty rotation. An alloy mechanical seal paired with a double water seal arrangement keeps the unit watertight through multi-year submerged service. The motor’s brushless DC architecture eliminates the brush wear that limits conventional motor service life.
The Hybsun 4GPH5.5-120-38 hybrid well pump ships with its matched AC/DC hybrid controller in an IP65-rated enclosure suitable for outdoor or pump-house mounting.
Input flexibility: 380V AC mains or DC 500-780V from solar PV, with the controller switching automatically between sources based on available power. MPPT tracking on the solar input squeezes maximum yield from the PV array across changing irradiance conditions.
Maximum input current: 17 A. The smart-feature set distinguishes Hybsun’s hybrid platform from conventional pump controllers:
GPRS remote control (start/stop via web or phone — essential for unattended Paphos vineyards or remote Larnaca farms). Child Lock anti-stealing function (prevents unauthorized power-up at rural sites). Intelligent self-cleaning (programmed reverse-cycle to dislodge fine sediment). Wireless long-distance start/stop without a float switch (useful for elevated tank installations at hotels).
At 5.5 kW commercial scale, a battery-backed off-grid configuration would need substantial storage capacity for any meaningful night-time runtime — typically uneconomic.
The Hybsun 4GPH5.5-120-38 hybrid well pump’s hybrid topology uses 380V AC mains as the backup source instead. Sunny daytime hours → solar PV powers the pump. Night, heavy overcast, very early morning → controller automatically draws from the AC mains supply.
Practical outcome: uninterrupted 24-hour pumping capability without battery investment. The grid acts as effectively unlimited backup storage at zero battery cost. For commercial Cyprus customers where consistent water supply is mission-critical, this is the architecture that keeps project economics realistic.
Soft start (no inrush current damage to the motor), dry-run protection (pump stops if there’s no water, auto-restarts 30 minutes later), over-voltage, under-voltage, over-current, overload, phase-loss, high working temperature protection, and adjustable speed (frequency conversion). The controller automatically starts and stops the pump based on solar conditions. For boreholes subject to occasional dry-out, the automated retry function removes the manual reset trip — the pump tests the well itself every 30 minutes.
Unboxing & First Look
The Hybsun 4GPH5.5-120-38 hybrid well pump kit is in a wooden box with the pump, the DC solar controller, and accessories. Here’s an unboxing walkthrough showing what’s in the box and how the kit goes together:
Video by Hybsun showing the standard submersible solar well pump kit. The Hybsun 4GPH5.5-120-38 hybrid well pump ships in the same kit format with its model-specific pump.
Who Should Buy This
The Hybsun 4GPH5.5-120-38 hybrid well pump fits a recognizable set of Cyprus commercial buyer profiles:
Hybsun’s 4GPH platform is consistent across the range — same MPPT controller architecture, same NSK bearings, same IP65 outdoor protection, same 10-protection set, same 2-year warranty. Models differ in rated power and the flow-vs-head envelope. Compare the 4GPH family:
Hybsun’s PV sizing rule across the entire product line: total array power must equal or exceed 1.3 × the pump’s rated nominal power.
For the 5.5 kW Hybsun 4GPH5.5-120-38 hybrid well pump → minimum 7,150 Wp of PV (≥ 7.15 kWp), typically 18-20 modern 400 W modules. The 30% over-sizing covers real-world losses: temperature de-rating in Cyprus summer heat, dust accumulation, DC-side cable resistance, panel ageing.
Most commercial installs land in the 8-10 kWp range for comfortable headroom through partial shade conditions and end-of-life panel degradation.
PV string voltage range: the controller’s MPPT input window is 500-780 V Vmp, with open-circuit voltage staying under 800 V. That fits 14-20 modern 400 W panels in series — careful panel selection keeps Voc within the controller’s limit across Cyprus summer-heat Voc rise.
Hybsun publishes a continuous performance curve from Q.Max 38 m³/h (at zero head) to H.Max 120 m (at zero flow). The table below transcribes the curve at standard head intervals.
“Total dynamic head” = static water level depth + pipe friction losses + vertical rise to your discharge tank. Pipe friction in the rising main adds roughly 5-10m to the effective head — the exact figure depends on pipe diameter, total run length, and number of fittings.
Putting those flow numbers into commercial water-demand context for the Hybsun 4GPH5.5-120-38 hybrid well pump:
For an exact sizing calculation, send CGP Solar your static water level, expected drawdown, pipe run length, storage tank height, and daily water demand — we’ll work it out against the curve.
Three things distinguish the Hybsun 4GPH5.5-120-38 hybrid well pump from generic Chinese-market submersible pumps in the same kilowatt class:
Hybrid topology with seamless AC/DC switching. Most submersible pumps run from one power source only — pure AC mains or pure DC solar. The Hybsun 4GPH5.5-120-38 hybrid well pump handles both seamlessly, switching automatically as solar conditions change. For 24-hour Cyprus commercial supply without battery investment, this architecture is structural, not optional.
Stainless steel wet end matched to Cyprus water. Mineral-rich Cyprus groundwater eats plastic and mild-steel pumps. The Hybsun 4GPH5.5-120-38 hybrid well pump’s full stainless construction (SS oil cylinder, SS outlet, SS connect per datasheet, plus series-standard AISI 304 wet end) is the right material spec for the duty.
Smart-feature set built in. GPRS phone remote, Child Lock anti-stealing, intelligent self-cleaning, wireless start/stop — these aren’t add-ons sold separately. They’re integrated into the standard controller. For unattended rural Cyprus installations, this set genuinely reduces operating overhead.
Same rotating hardware quality as the rest of the Hybsun premium range: NSK industrial bearings (the Japanese-brand bearings used as a standard across continuous-duty pumping equipment) pair with an alloy mechanical seal, and a dual water seal arrangement keeps the pump body sealed against ingress over years of commercial submerged duty. Hybsun captures the design intent in its datasheet as “offering the longer working life”.
Without soft-start, a 5.5 kW motor switched directly to mains draws an inrush current spike of 25-30 kW momentarily at startup — three times pump nominal power for a fraction of a second.
That spike stresses motor windings, can trip nearby breakers, and accumulates wear on the pump shaft and bearings cycle after cycle. Soft-start ramps motor speed up gradually instead, eliminating the spike entirely. The result: lower mechanical stress per start, longer pump life, no breaker problems for grid-tied installations.
If the well draws down past supply (which can happen during peak demand on a 24 m³/h pump from a marginal-recharge borehole), the Hybsun 4GPH5.5-120-38 hybrid well pump stops automatically.
After 30 minutes, the controller attempts a restart. If the well has recovered, pumping resumes. If not, the cycle repeats. No manual reset required. No risk of running the pump dry and damaging the impeller or motor seals. This protection alone justifies the hybrid controller architecture for unattended Cyprus rural installations.
A typical Hybsun 4GPH5.5-120-38 hybrid well pump commercial install runs 6-9 working days end-to-end. At this power class the project is engineered work rather than off-the-shelf installation.
Stage 1 — site assessment (2-3 days from initial call). Well depth measurement, static and dynamic water levels, casing diameter verification (4-inch minimum required), recharge testing for sustained 24 m³/h drawdown, 380V AC mains adequacy check, PV array siting evaluation (8-10 kWp typical footprint).
Stage 2 — engineering & quotation (3-4 days). We coordinate solar array sizing with AC backup wiring, specify the rising-main pipe diameter to avoid friction losses, and confirm borehole capacity for the operating envelope.
Stage 3 — install (1-2 days on site). Pump deployment on rising-main with safety cable (typically half a day for medium-depth wells), PV array erection (1 day for 8-10 kWp arrays), hybrid controller mounting and wiring to both solar PV and 380V AC inputs (half a day), commissioning with both power sources active.
CGP Solar handles the full sequence across Nicosia, Limassol, Paphos, Larnaca, and the Famagusta region.
CGP Solar specifies, supplies and installs the Hybsun 4GPH5.5-120-38 hybrid well pump across all five Cyprus districts — Nicosia, Limassol, Paphos, Larnaca, and the Famagusta region.
Engagement scope: borehole survey with 4-inch casing verification, optional water-quality testing, PV array sizing against operational water demand, pump deployment on rising-main pipe with safety cable, AC mains coordination, and full system commissioning under both solar PV and 380V AC inputs.
Mid-tier commercial demand + bright Cyprus sunshine + Hybsun 4GPH5.5 = 24 m³/h on tap from your borehole, year after year.
Contact us today to schedule your personalised free consultation.
FAQ’s
Hybsun specifies H.Max at 120 m with H.Rated at 58 m (and Q.Max 38 m³/h, Q.Rated 24 m³/h). The published curve shows 120 m maximum head at zero flow.
Practical working depth extends comfortably to about 100 m, where the Hybsun 4GPH5.5-120-38 hybrid well pump still delivers around 18 m³/h (≈108 m³/day on a 6-hour solar day, ≈432 m³/day with 24h AC backup operation).
Efficient operating zone: 40-80 m head, with flow staying between 23 and 32 m³/h. For boreholes deeper than 120 m, step up to the 4GPH11-175/38 (175 m head reach, 38 m³/h Q.Max). For shallower wells needing similar flow but lower power, consider the 4UPH2200 (2.2 kW, 15 m³/h, 105 m head).
Per Hybsun’s sizing rule: ≥ 1.3 × pump power in PV.
For the 5.5 kW Hybsun 4GPH5.5-120-38 hybrid well pump → ≥ 7,150 Wp minimum (typically 18-20 modern 400 W modules). Most commercial installs size to 8-10 kWp for partial-shade and summer-heat headroom.
PV string voltage must land within the controller’s MPPT window: 500-780 V Vmp, Voc < 800 V. That’s typically 14-20 panels in series depending on panel specifications. For 24/7 hybrid operation via 380V AC backup, the array can be sized to the minimum without significant downside — the grid covers any solar shortfall.
For most Cyprus installations, no — the Hybsun 4GPH5.5-120-38 hybrid well pump uses 380V AC mains as the backup power source instead of batteries.
When solar PV is producing enough → pump runs from solar. When it isn’t (night, heavy overcast) → controller automatically draws from AC mains. The hybrid topology means uninterrupted 24-hour supply at no battery cost.
At 5.5 kW pump scale, a battery-backed off-grid system would need 30-60 kWh of storage for meaningful night-time operation — typically uneconomic. For sites genuinely off-grid (no AC available), a DC-side battery is technically possible but the project economics rarely support it at this power class.
Hybsun’s 4GPH5.5 is built with SS oil cylinder, SS outlet, SS connect. The series-standard AISI 304 grade extends through the rest of the wet end — impeller, diffuser, stage casing, jacket, wear ring, strainer. The shaft is AISI 431.
AISI 304 is the same corrosion-resistant grade used in food processing, marine hardware, and medical equipment. For Cyprus boreholes carrying calcium, sand, or chloride content, this is the matched construction tier.
Hybsun’s standard 2-year manufacturer warranty.
The Hybsun 4GPH5.5-120-38 hybrid well pump is CE-certified (European Conformity — mandatory for EU/Cyprus sale). Hybsun’s manufacturing facility holds ISO 9001:2015 certification (verified on the 3US datasheet, registration HB 010 0812889).
The AC/DC hybrid controller is IP65-rated — fully dust-tight, protected against pressurised water jets — suitable for outdoor weather-exposed mounting, pump-house installation, or industrial environment placement.
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