For Cyprus boreholes where the water table sits 100 metres or deeper below ground — common across the Paphos uplands, the Famagusta interior, and the inland farming belt running through Nicosia and Larnaca districts — the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump is the depth specialist of the 4GPH 11 kW range. 227 metres of vertical reach at zero flow, 24 m³/h sustained at the rated 144 m head, with 28 m³/h peak flow at shallower lift. The 2-inch outlet is sized for the higher pressures that deep-well operation requires. Solar PV by day, 380V three-phase AC mains backup at night, automatic switchover.
✓ VAT included · Delivery in Cyprus
What It Is
Across the Pitsilia region, the Akamas Peninsula, and the foothills running off the Troodos massif, the productive aquifers sit deep in the bedrock — typically 130 to 180 metres below the surface, occasionally pushing past 200 m during prolonged drought cycles. Conventional 4-inch submersible pumps can’t reach those depths. The Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump is built around that operating envelope.
Working numbers: maximum vertical reach of 227 m, rated point of 16 m³/h at 144 m, and peak flow of 28 m³/h at moderate lift. The 2-inch outlet matches the internal pressure profile a 144+ m water column generates (around 14 bar of static pressure at the rated point, before dynamic losses are accounted for).
Where the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump sits in Hybsun’s four-variant 11 kW range: deeper than the 4GPH11-175/38 (which tops out at 175 m and is sized for the 100-130 m bracket common across Paphos uplands and Famagusta interior), shallower than the 4GPH11-480/12 extreme-pressure variant (which carries on past 200 m for ultra-deep specialty applications). The 227/28 occupies the depth band where mountain bedrock aquifers concentrate.
What that means in practical Cyprus terms: this is the pump for traditional stone-house properties in the Pitsilia foothill villages drilling new boreholes after the old shallow well dried up; for Akamas peninsula research stations and isolated agricultural plots; for elevated agritourism complexes in the Troodos foothill belt; and for mountain-district village water cooperatives that have to commit to a deep bedrock source because nothing shallower works any more.
AISI 304 Stainless Steel Construction
Three components are called out as stainless directly on the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump unit: SS oil cylinder, SS outlet, and SS connect. The rest of the wet end follows the 4GPH series construction standard — multi-stage AISI 304 impeller stack, diffuser, casing, jacket, wear ring, and intake strainer. The shaft is AISI 431, the higher-grade stainless Hybsun uses for rotating components across the premium pump range.
What’s specific to mountain bedrock duty: Cyprus inland bedrock aquifers tend to carry a chemistry profile that’s different from coastal sources. Chloride content is typically low. Pitsilia and Troodos-influenced aquifers particularly tend toward higher mineral concentrations.
What this delivers in field service: a wet end that holds its hydraulic profile across years of continuous mountain-duty operation rather than wearing out and forcing replacement. At 11 kW project scale where pulling a damaged pump from 144 m below ground is a serious recovery event, this construction grade is what makes the lifecycle economics defensible.
The Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump runs Hybsun’s 4GPH 11 kW motor — the same platform shared across the four 11 kW variants. It’s a brushless permanent-magnet synchronous design (see brushless permanent magnet motor) accepting either DC from the solar array or three-phase AC from the mains, on the same set of windings.
Coils are wound on automated equipment using centralized winding technique. The advantage over hand-wound is geometric: tighter consistency between coil turns, translating to better magnetic-field uniformity, translating to higher continuous-duty efficiency. At very-deep operation where the motor works close to its rated point for hours at a time, that efficiency delta compounds across the operating year.
Rotating gear: NSK industrial bearings are the standard across the Hybsun premium line for good reason — Japanese-brand bearings designed for continuous-duty applications. The shaft seal stack pairs an alloy mechanical seal with a double water seal arrangement, holding back the higher internal pressures very-deep operation produces. Hybsun designs the platform around “the longer working life” — that’s the explicit design intent for the entire 4GPH lineup.
The matched hybrid controller for the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump ships in an IP65 outdoor enclosure — sized for mounting at exposed mountain wellhead locations or inside a pump shed.
Inputs: 380V three-phase AC mains on the AC side, or DC 500-780 V from a solar PV array on the DC side. The controller hands off between sources automatically based on what’s available, with MPPT tracking on the solar side maximizing yield across the changing irradiance patterns mountain sites typically see (cloud transit over Troodos, terrain shading, that kind of thing).
Maximum input current: 30 A. Smart-feature suite that makes mountain-region operation practical:
GPRS remote start/stop over web or phone — particularly valuable when the wellhead sits a 45-minute mountain road drive away. Child Lock stops anyone unauthorized from powering up a remote unit. Intelligent self-cleaning runs programmed reverse cycles to clear fine sediment from the impeller stack — useful given the mineral load of mountain bedrock water. Wireless start/stop removes the float-switch failure point from elevated-tank installations common at mountain water systems.
At 227 m vertical reach driven by an 11 kW motor, a battery-backed off-grid system stops making financial sense pretty quickly. Storage for any meaningful night-time runtime would run 100+ kWh — a five-figure capital line item before installation.
Hybrid topology dodges that calculation. The 380V three-phase AC mains supply does the backup work, with the controller drawing from solar PV through daylight hours and falling over to mains at night, during sustained overcast, or whenever the array doesn’t have enough output to drive the pump.
For Cyprus mountain installations, three-phase service is usually present at agricultural and resort sites (the wellhead infrastructure tends to follow the same property service). Where it isn’t, an EAC service upgrade is a known cost and timeline. Either way, three-phase as backup is the architecture that lets these mountain-region very-deep projects pencil out — battery-based off-grid simply doesn’t at this power class.
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 4GPH11-175-38 hybrid deep-well high-speed 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 4GPH11-175-38 hybrid deep-well high-speed pump ships in the same kit format with its model-specific pump.
Who Should Buy This
This pump fits a recognisable cluster of Cyprus mountain and very-deep installation profiles. If your project matches one of these, the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump is likely the matched specification:
The 4GPH 11 kW lineup has four variants sharing the same motor and controller platform — they trade flow for vertical reach across the operating envelope. Pick the variant that matches your borehole depth:
Sizing rule from Hybsun across the entire range: solar array power ≥ 1.3 × pump rated power.
Applied to the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump (11 kW pump): floor is 14,300 Wp · ~14.3 kWp, roughly 36-40 modern 400 W modules. Most mountain-region installs go higher — 16-20 kWp is typical, sometimes 22-24 kWp on sites with significant terrain shading or partial east-west orientation. The extra headroom covers summer heat de-rating, partial-shade events from mountain features, and end-of-life panel degradation across the array lifetime.
String voltage: the controller’s MPPT input window is 500-780 V Vmp with Voc < 800 V. Mountain installations often run the PV array some distance from the wellhead because the best solar siting isn’t always next to the borehole — DC-side string voltage and cable cross-section need to be engineered jointly to keep transmission losses reasonable.
One extra consideration specific to very-deep operation: array oversizing past the 1.3× floor (think 1.5-1.8×) helps MPPT input voltage stay stable through the operating day. Stable MPPT input means stable motor speed, which means steady hydraulic operation, which is what the pump’s wet end appreciates over multi-year service.
Hybsun publishes a continuous performance curve for the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump running from 28 m³/h at zero head down to zero flow at 227 m H.Max. The table below transcribes that curve at standard head intervals — direct curve readings, not interpolations between rated points.
Read this as: “total dynamic head” sums static water level depth, friction losses through the rising main, and any additional vertical rise from wellhead to your tank or distribution point. Friction matters more than usual at very-deep operation: a properly-sized 2″ main contributes roughly 10-18 m of effective head over a 140-180 m vertical pipe run, depending on the sustained flow rate. Undersized surface pipe downstream of the wellhead can easily cost another 5-10 m.
“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.
What that flow envelope looks like translated into Cyprus mountain-region water demand:
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 structural points separate the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump from generic 11 kW submersibles aimed at the very-deep market:
Hydraulic geometry tuned for 130-200 m operating depths. Generic 11 kW pumps usually pick a side — either high bulk flow (3″ or larger outlets, modest depth) or pure pressure-boost (1″ or 1.25″ outlets, extreme depth). The 4GPH11-227/28 sits in the very-deep-with-useful-flow zone: 16 m³/h sustained at 144 m. That operating point lines up with Cyprus mountain bedrock aquifer conditions rather than generic specifications.
Hybrid platform — solar plus three-phase on one controller. Single-source pumps require either grid availability at the wellhead or battery-backed off-grid investment. At very-deep mountain operation, neither alternative is great: grid-only burns expensive EAC electricity, battery-backed off-grid is essentially uneconomic at 11 kW scale. The hybrid topology solves both problems with one controller.
Full AISI 304 wet end tuned for bedrock aquifer chemistry. Cyprus mountain water carries calcium carbonate, dissolved magnesium, occasional iron content. Generic mixed-metal construction degrades against this chemistry within a few service years; AISI 304 handles it across multi-year continuous duty without significant degradation.
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 designs the platform around “the longer working life” — that’s the explicit design intent for the entire 4GPH lineup.
Switching an 11 kW motor directly onto mains draws an instantaneous inrush spike around 50-65 kW — roughly five times nominal motor power, for the fraction of a second the rotor takes to start spinning.
At very-deep operation that’s not just an electrical event. The hydraulic shock travels the full length of the rising main from 144+ m below ground, hitting every threaded joint, the impeller stack, and the shaft. Across hundreds or thousands of start cycles in the pump’s service life, the accumulated mechanical fatigue is significant. Soft-start ramps motor speed up over a couple of seconds instead, eliminating the spike completely — the pump’s mechanical assembly never sees those peak hydraulic loads. For mountain-region installations where in-field repair is expensive and remote, this is what stretches service life from years into decades.
Bedrock wells behave differently than shallow alluvial boreholes. The water column above the intake is larger, so short-term high-demand draws don’t immediately starve the pump. But when an extended drawdown does overshoot recharge supply, the aquifer also refills slower than a shallow well would.
The hybrid controller monitors operating conditions continuously. If pump intake stops getting water, power cuts immediately. Half an hour later the controller attempts a restart. If the bedrock has recovered enough to support pumping, normal operation resumes. If not, the wait-and-retry cycle continues until the aquifer refills. Critical at very-deep operation because a pulled pump from 144 m below ground in the Pitsilia region or on the Akamas peninsula is a major recovery operation — specialized rigging, often a full day of remote-site work, significant cost. The dry-run protection is what keeps that recovery from ever needing to happen.
A mountain-region Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump install typically runs 12-15 working days end-to-end. The combination of very-deep pump deployment and often-remote site access drives the timeline beyond a standard 11 kW project.
Stage 1 — site assessment (4-6 days). Well depth measurement on site (we don’t accept customer estimates on very-deep wells — error margins matter at 144+ m depth), static and dynamic water levels, casing integrity inspection across the full pump-set depth (joint failures are a known mode in older deep wells), borehole recharge testing against the 14-19 m³/h drawdown the pump will draw, three-phase service capacity verification at the wellhead, PV array siting accounting for mountain terrain shading.
Stage 2 — engineering & quotation (5-7 days). Solar array sizing against operational water demand, rising-main pipe diameter sizing for the very-long vertical run, three-phase wiring design, borehole capacity model checked against the published hydraulic curve.
Stage 3 — install (3-5 days on site). Pump deployment at 150+ m depth typically takes 2 days for the lowering operation alone, with specialized safety-cable management equipment. PV array erection 1-2 days for 16-20 kWp. Three-phase controller mounting and dual-source commissioning roughly 1 day.
CGP Solar handles end-to-end work across Pitsilia, the Akamas peninsula, the Troodos foothills, the elevated Limassol and Paphos districts — plus the lowland regions (Nicosia, Larnaca, Famagusta) where occasional very-deep wells exist.
CGP Solar specifies, supplies and installs the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump across the Cyprus mountain regions — Pitsilia, the Akamas peninsula, the Troodos foothills, the elevated Limassol and Paphos districts — plus the rest of the country wherever an occasional very-deep well exists.
Engagement scope: site-verified well depth survey, full pump-set-depth casing inspection, bedrock recharge testing, three-phase mains capacity confirmation, mountain-terrain PV array siting (typically 16-22 kWp), specialized deep-well pump deployment with rising-main and safety cable, hybrid controller wiring to both solar PV and three-phase AC inputs, dual-source commissioning under both power sources active.
Mountain bedrock aquifer + bright Cyprus sunshine + Hybsun 4GPH11-227/28 = 16 m³/h sustained from 144 metres below ground, year-round, with three-phase grid as your night-time and overcast-weather safety net.
Contact us today to schedule your personalised free consultation.
FAQ’s
Headline figures: H.Max 227 m, H.Rated 144 m, Q.Max 28 m³/h, Q.Rated 16 m³/h (the guaranteed minimum at the rated point). The curve sits reasonably flat at the shallow end — 26 m³/h around 40 m head, 24 m³/h around 80 m. Things drop faster past 120 m: roughly 22 m³/h at 120 m, 19 m³/h at the 144 m rated point (the curve runs above the warranted 16 m³/h floor), 15 m³/h at 170 m, 10 m³/h at 200 m. For boreholes pushing past the 227 m H.Max, step up to the 4GPH11-480/12 extreme-pressure variant. For shallower wells in the 100-150 m bracket where higher flow matters more, the 4GPH11-175/38 trades depth for 38 m³/h peak.
Pick by static water level, not by drilled borehole depth — the two are different numbers and the difference matters. If your static sits consistently above 130 m, the 4GPH11-175/38 is the better-matched choice. Same 11 kW motor, but the hydraulic geometry is tuned for the 80-130 m depth bracket — peak flow rises significantly (38 m³/h Q.Max vs 28 on the 227/28), and the rated point delivers 24 m³/h at 110 m. If your static sits routinely between 130 and 180 m below ground (the depth band typical across Pitsilia, the Akamas peninsula, the Troodos foothills, and elevated Limassol/Paphos terrain), the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump is the matched specification: its 144 m rated point lands in the middle of that bracket, and the hydraulic envelope keeps delivering useful flow through 200 m+. For ultra-deep wells past 200 m, neither pump is correct — step up to the 4GPH11-480/12 extreme-pressure variant instead. CGP Solar measures static water level on site as part of the deep-well project survey — customer estimates aren’t reliable enough at these depths to commit to a pump model.
Internal pump pressure scales with vertical lift. At the Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump’s 144 m rated point, static pressure alone is about 14 bar — and dynamic losses through the impeller stack add more. The 2″ outlet is sized to that pressure profile rather than to bulk flow capability. A larger outlet (like the 3″ on the high-flow 4GPH11-126/52) would move volume better at shallow operation, but isn’t engineered for very-deep pressure duty. Same reasoning explains the 1.5″ outlet on the 4GPH11-480/12 extreme-pressure variant — smaller outlet, even higher pressures. Practical install note: size your surface piping downstream of the wellhead for the actual sustained flow at your operating depth (the table above), not for the headline Q.Max. Oversized pipe doesn’t hurt; undersized pipe will cost you 8-15 m of effective head from friction.
Hybsun’s sizing rule sets the floor: PV array power ≥ 1.3 × pump rated power. Applied to 11 kW that’s 14,300 Wp minimum — roughly 36-40 modern 400 W modules. For mountain-region installations specifically, most projects come in higher (16-22 kWp) because mountain sites tend to see more partial-shade events from terrain features, and the array often runs at significant azimuth offset from optimal-south because the best solar siting isn’t always the same place as the best wellhead siting. String voltage has to land in the controller’s 500-780 V Vmp window with Voc under 800 V — that’s typically 14-18 panels per string. Important detail at very-deep operation: oversizing past 1.5× actively helps with MPPT input voltage stability through the day, which keeps motor speed steady, which is something the multi-stage wet end appreciates over years of continuous duty. CGP Solar sizes against operational demand rather than the bare minimum.
Standard 2-year manufacturer warranty from Hybsun on the pump itself. The Hybsun 4GPH11-227-28 hybrid deep-well high-speed pump carries CE conformity for EU/Cyprus sale, and Hybsun’s manufacturing facility holds ISO 9001:2015 certification. The AC/DC hybrid controller is IP65-rated — dust-tight and pressurized-water-jet protected — appropriate for outdoor mounting at exposed mountain wellhead locations, or inside a pump shed at agricultural and resort sites.
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