Got a really deep well? One that even bigger centrifugal pumps can’t quite reach? The Hybsun 3HR750-140-2.3B DC solar screw well pump is purpose-built for the deepest boreholes in the Cyprus countryside — a 750 W brushless DC submersible that lifts water from depths up to 140 m at a sustained 2.3 m³/h max flow. The helical rotor (progressive cavity) design pushes water at much higher pressure per watt than centrifugal pumps, which is exactly what you need for very deep wells. Whole system runs from 2-3 modern solar panels — no grid hookup needed. CE and ISO 9001 certified.
✓ VAT included · Delivery in Cyprus
What It Is
The most useful number on the Hybsun 3HR750-140-2.3B DC solar screw well pump’s spec sheet is 140 metres — that’s the maximum head this 750 W pump can lift water against, which is roughly twice what an equivalent centrifugal pump manages on the same input power. The reason is mechanical: the helical rotor (progressive cavity) mechanism is a single metal screw turning inside an elastomer stator that displaces water continuously, converting far more of the input wattage into lifting pressure than the rotating impellers in a centrifugal pump can. For Cyprus farms with deep, low-yield boreholes — the kind where the static water level sits 80, 100, even 120 metres down, and the well doesn’t recharge fast — that pressure-per-watt advantage is exactly the right characteristic. Flow is moderate (2.3 m³/h max, roughly 55 m³/day at peak solar irradiance) but it’s steady, pulse-free, and pressure-stable across the entire operating range. The whole system runs from 2-3 modern solar panels — no grid connection, no diesel generator, no monthly bill.
Helical Rotor Technology
Like the smaller 3HR210, the Hybsun 3HR750-140-2.3B DC solar screw well pump uses helical rotor technology — also known as a progressive cavity pump or screw pump. Rather than the rotating impellers in centrifugal pumps, a single helical metal rotor turns inside a stator and displaces water continuously. The advantage is dramatic in deep wells: helical rotor pumps generate far more pressure per watt of input power than centrifugal pumps, which is why the 750 W 3HR750 can reach 140 m of head while the equivalent centrifugal 3UP1500 (which uses double the power) tops out at 125 m. The trade-off is lower maximum flow — 2.3 m³/h vs 6 m³/h — but for deep, low-yield wells where the water doesn’t recharge fast anyway, this is exactly the right characteristic.
The Hybsun 3HR750-140-2.3B DC solar screw well pumpruns a brushless DC permanent-magnet synchronous motor — engineered to operate efficiently across a wide range of solar input conditions. The motor turns on NSK bearings — Japanese industrial-grade bearings selected for continuous-duty rotating equipment — alongside an alloy mechanical seal that handles the chlorides and minerals common in deep well water. The pump body is sealed by a double water seal arrangement, ensuring it stays fully waterproof and leak-tight across the years of service the pump will see.
A matched DC solar controller ships with every Hybsun 3HR750-140-2.3B DC solar screw well pump — housed in an IP65 enclosure for outdoor installation. The controller does maximum power point tracking (MPPT) to extract the most power from your PV array, accepts up to 15 A input current, and shows live operating data (power, voltage, current, motor speed) on its built-in LED display. Variable-frequency drive lets the controller adjust pump speed continuously based on available sunlight — the pump runs at full speed under midday sun and slows down as PV output drops, automatically.
The 3HR750 DC controller carries a built-in battery charging function. Connect an optional 48 V battery (LiFePO4 typically, sized 100-200 Ah) and the controller manages charge/discharge automatically — during the day it charges the battery while running the pump from solar, and after dark or during overcast weather it draws from the battery to keep pumping. For applications where continuous water availability matters (drinking water supply, livestock), the battery option transforms this into a 24-hour pump. The battery is fully optional and only needed if you have a use case for night-time pumping.
The Hybsun lists the full protection envelope: soft start (no inrush damage to the motor), over-voltage, under-voltage, over-current, high-temperature and adjustable speed (frequency conversion). For wells that occasionally run dry, the auto-restart is particularly useful — the pump checks again 30 minutes later instead of needing a manual reset.
Unboxing & First Look
The Hybsun 3HR DC submersible solar 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 3HR750-140-2.3B DC solar screw well pump ships in the same kit format with its model-specific pump.
Who Should Buy This
The 3HR series targets a specific application profile — deep boreholes paired with low-to-moderate water demand, where helical rotor pumping’s constant-pressure output is better suited than a centrifugal pump’s flow-falls-with-head curve. The 3HR750 buyer profiles below cover the most common Cyprus use cases:
Hybsun’s solar well pump platform is consistent across the range — stainless steel construction, NSK bearings, MPPT controllers, and IP65 outdoor protection on every model. What differs between models is the pump architecture (helical rotor here, centrifugal elsewhere), the power rating, and the flow-vs-head curve characteristics. Compare across the range:
The PV sizing rule Hybsun applies across the 3HR series is consistent: PV array power must be ≥ 1.3 × the pump’s rated power. For the Hybsun 3HR750-140-2.3B DC solar screw well pump that means at least 975 Wp of solar panels (2-3 modern 400W panels typically). The 30% buffer covers real-world losses that pull panels below their nameplate output — summer heat de-rating, dust buildup on the glass, cable resistance, and the gradual ageing all panels go through.
The 3HR750 controller accepts a PV string with operating voltage 48-96 V Vmp, with open-circuit voltage limited to below 105 V. That range comfortably fits 2-3 panels wired in series — typical 400 W panels have Vmp around 36-40 V and Voc around 45-50 V each, so 2 panels in series sit around 72-80 V Vmp (Voc ~95 V), and 3 panels reach the upper bound. The wide range gives your installer flexibility on panel selection and array geometry.
Like all submersible well pumps, the Hybsun 3HR750-140-2.3B DC solar screw well pump’s flow rate drops as the lift height (total dynamic head) increases. The 2.3 m³/h headline figure is the manufacturer’s peak rating at zero head — in a real installation with depth and pipe friction the actual flow is lower. Here’s what the manufacturer’s performance curve actually shows for the Hybsun 3HR750-140-2.3B DC solar screw well pump, with daily output figures for a typical 6-hour Cyprus solar day:
“Total dynamic head” = static water level depth + pipe friction losses + vertical rise to your discharge tank. Allow roughly 5-10m of pipe friction on top of the static depth — the exact figure depends on pipe diameter and run length.
To translate flow rate into your specific 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 and pick the right pump.
On a deep, low-yield well — and Cyprus has plenty of those — a centrifugal pump is the wrong tool. Centrifugal pumps lose efficiency rapidly as head increases, and they cope poorly with wells where the water column draws down faster than the aquifer recharges. The Hybsun 3HR750-140-2.3B DC solar screw well pump’s helical rotor design solves both problems at once. Pressure stays high through the entire flow range, so the pump still works efficiently at 100+ metres of head. And the constant-displacement design tolerates low water levels far better than centrifugal impellers, which can cavitate (and damage themselves) when water gets thin. For deep, marginal wells — the kind that traditional pumps struggle with — this is the right pump category.
The Hybsun 3HR750-140-2.3B DC solar screw well pump is constructed from stainless steel per Hybsun’s specification — corrosion-resistant against the minerals, chlorides and slight acidity common in Cyprus well water. The Hybsun 3HR750-140-2.3B DC solar screw well pump operates submerged 30 to 100+ metres deep for years on end — stainless construction is what allows that kind of service life without internal degradation. The critical wear interface (rotor against stator) is designed to handle the sediment loadings characteristic of natural groundwater.
The Hybsun 3HR750-140-2.3B DC solar screw well pump carries the same mechanical hardware specification as the rest of the Hybsun line: NSK industrial bearings (Japanese-brand, the default for continuous-duty rotating equipment), an alloy mechanical seal, and a double water seal arrangement maintaining a leak-proof boundary across the pump’s operational lifetime. Hybsun’s spec sheet phrasing — “offering the longer working life” — captures the engineering objective for a deep agricultural well pump.
A soft-start circuit in the controller brings the motor up to running speed gradually rather than switching it on at full current. The reason this matters: every time a conventional AC motor starts cold, it briefly draws 5-7× its rated current — that inrush spike is what gradually degrades motor windings and bearings over years of daily start/stop cycles. The 3HR750’s soft-start eliminates that spike entirely, which is one of the factors that lets Hybsun back the pump with a 2-year warranty for daily-use applications.
If the well runs dry (which can happen on low-yield boreholes during peak summer drawdown), the Hybsun 3HR750-140-2.3B DC solar screw well pump stops automatically and tries again 30 minutes later. No manual reset. No burnt-out motor. The Hybsun 3HR750-140-2.3B DC solar screw well pump manages this automatically every time — a low-yield deep borehole that occasionally goes dry doesn’t pose any threat to the pump.
Typical CGP Solar project timeline: site survey and well assessment (2-5 days to schedule — we measure your well depth and static water level, and confirm the casing diameter), formal quotation (about 1-2 days), then on-site work — lowering the pump on rising main pipe with safety cable (half a day for typical residential depths), PV array and controller install above ground (half a day), and commissioning under live solar with handover walkthrough (same day). CGP Solar handles installations across all five Cyprus districts — Nicosia, Limassol, Paphos, Larnaca and Famagusta.
CGP Solar specifies, supplies and installs the Hybsun 3HR750-140-2.3B DC solar screw well pump across Cyprus — Nicosia, Limassol, Paphos, Larnaca and Famagusta. What we do: assess the borehole (depth, casing, static water level), specify the PV array to your daily water demand, deploy the pump on rising-main pipe with a safety cable, and commission the system under live solar. Deep well + sunshine + Hybsun 3HR750 = water for free, every sunny day
Contact us today to schedule your personalised free consultation.
FAQ’s
The catalogue lists H.Max at 140 metres, and the published performance curve confirms that figure — the curve’s y-intercept (zero flow) sits at exactly 140 m. The practical working range extends to about 120 m of total dynamic head, where the Hybsun 3HR750-140-2.3B DC solar screw well pump still delivers ~0.6 m³/h (about 3.6 m³/day on a typical 6-hour Cyprus solar day). Below 100 m head the pump runs in its efficient zone — 1+ m³/h flow at 100 m, ~1.4 m³/h at 80 m, ~1.7 m³/h at 60 m. For shallow wells under 30 m the smaller Hybsun 3HR210 is more economical; for higher-flow needs at moderate depths look at the centrifugal Hybsun 3UP1500.
Hybsun specifies PV panel power of 1.3 × pump rated power as the minimum. For the 750 W 3HR750, that means at least 975 Wp of panels — typically 2-3 modern 400 W modules. The PV string voltage has to land within the controller’s MPPT range: 48-96 V Vmp, with the open-circuit voltage staying below 105 V. Two 400W panels wired in series usually hit the Vmp range nicely. CGP Solar runs the full sizing calculation — panel make/model, string configuration, cable sizing — as part of every quotation.
Yes — the Hybsun 3HR750-140-2.3B DC solar screw well pump’s DC controller includes an automatic battery charging function. You can add an optional 48 V battery pack and the controller will charge it during sunlight hours while running the pump, then power the pump from the battery after sunset or during cloud cover. For deep-well drinking water installations where continuous water availability is non-negotiable, this is a practical upgrade — you get true 24-hour pumping capability without grid power. The battery is optional, not mandatory; the Hybsun 3HR750-140-2.3B DC solar screw well pump runs perfectly on solar alone during the day.
The decision is mostly about well depth and flow needs. A centrifugal pump (Hybsun 3UP series) is the right choice when your well is reasonably shallow and you need higher flow — for example, irrigating a large garden or a few hectares of crops. A helical rotor pump (this 3HR750 or its smaller sibling 3HR210) is the right choice when your well is deep, your daily water demand is moderate (a few cubic metres per day), or when the well has low water yield. The Hybsun 3HR750-140-2.3B DC solar screw well pump specifically excels at 60-120m deep wells where it delivers 1-2 m³/h of consistent flow — territory where the centrifugal 3UP1500 can also operate, but at double the pump power and a much larger solar array.
Hybsun backs the Hybsun 3HR750-140-2.3B DC solar screw well pump with a 2-year manufacturer warranty. The pump carries CE certification (European Conformity, mandatory for EU sale including Cyprus) and the manufacturing facility holds ISO 9001 quality-management certification. The DC solar controller is rated IP65 — fully dust-tight and protected against pressurised water jets — making it appropriate for pump-house mounting, basement installation, or exposed outdoor placement under typical Cyprus weather.
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