For Cyprus wells with hard water, mineral content, or sand, the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump is the construction tier matched to your conditions. A 300 W brushless DC submersible built around a full AISI 304 stainless steel impeller — sized specifically for abrasive water duty (where its plastic-impeller 3UP300 sibling is the right pick for clean groundwater installs). Delivers 4 m³/h max flow from wells up to 35 m deep, running on just 1-2 solar panels. Stainless throughout means the wet end is sized for years of submerged duty in mineral-rich or sand-bearing water conditions. CE and ISO 9001 certified.
✓ VAT included · Delivery in Cyprus
What It Is
For Cyprus wells with hard water, mineral content, or sand, the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump is the construction tier matched to those conditions. A 300 W brushless DC submersible built around a full AISI 304 stainless steel impeller — engineered specifically for abrasive water duty, sitting alongside the plastic-impeller 3UP300 sibling that’s purpose-built for clean groundwater installs. Delivers 4 m³/h max flow from wells up to 35 m deep, running on just 1-2 solar panels. Stainless throughout means the wet end is sized for years of submerged duty in mineral-rich or sand-bearing water — the conditions stainless construction is specifically matched to.
AISI 304 Stainless Steel Impeller
The defining feature of the 3US series is the full AISI 304 stainless steel impeller — the construction tier Hybsun built specifically for wells carrying abrasive content, sitting alongside the plastic-impeller 3UP range that’s purpose-built for clean groundwater installs. Why does this matter for Cyprus? Many rural wells here have hard water with significant mineral content (calcium, silica) and seasonal sand loading. Stainless steel construction is the matched tier for that abrasive duty. For wells delivering clean groundwater, the plastic-impeller 3UP range is the more cost-effective fit — Hybsun engineers it specifically for that scenario, and it performs excellently there. The entire wet end of the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump is built from stainless: external jacket, stage casing, diffuser, impeller, wear ring, strainer, and even the assembly screws — all AISI 304 (the same grade used in food-grade and medical equipment). The shaft is AISI 431, a slightly higher-grade stainless specifically suited for rotating duty.
Inside the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump sits a brushless DC permanent-magnet synchronous motor housed in an oil-cooled AISI 304 stainless steel jacket. The motor itself uses NSK Japanese-brand bearings paired with an alloy mechanical seal — both selected specifically for the long, slow run-times typical of solar well pumping. A double water seal arrangement ensures the pump body stays fully waterproof and leak-tight across years of continuous submerged operation. The motor shaft is AISI 304 stainless; the thrust bearing uses oscillation pads; the bearing bush is graphite.
The Hybsun 3US300-35-4A DC solar stainless steel impeller well pump ships with its matched DC solar controller in an IP65-rated enclosure for outdoor mounting. The controller tracks the maximum power point of your PV (MPPT), accepts up to 17 A on the input side, and shows live power, voltage, current and motor speed on a built-in LED screen. Frequency conversion lets the controller continuously adjust pump speed based on available sunlight — full speed under midday sun, automatic slowdown as PV output drops.
One useful feature: the 3US300 DC controller carries a built-in automatic battery charging function. Connect an optional 24 V battery and the controller will charge it during sunlight hours while running the pump. After sunset or in cloudy weather, the battery powers the pump for continued operation. For drinking-water installations that need water available outside solar hours, this is a worthwhile upgrade. The battery is fully optional; the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump works perfectly on solar alone during the day.
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). The dry-run + auto-restart pairing is particularly useful for Cyprus wells that occasionally pump down during peak summer.
Unboxing & First Look
The Hybsun 3US 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 3US300-35-4A DC solar stainless steel impeller well pump ships in the same kit format with its model-specific pump.
Who Should Buy This
Hybsun designed the 3US/3USH stainless steel impeller range specifically for buyers prioritising long pump life in challenging water conditions. The Hybsun 3US300-35-4A DC solar stainless steel impeller well pump buyer profiles below cover the most common Cyprus use cases:
Every Hybsun solar well pump in this range uses the same underlying platform — MPPT controller, NSK bearings, IP65 outdoor protection, CE/ISO 9001 certifications, and a 2-year warranty. The differences between Hybsun’s ranges are construction grade (stainless vs plastic impeller), pump architecture (centrifugal vs helical rotor), and rated power output. Compare the range:
Hybsun applies the same PV sizing rule across the entire 3US/3USH lineup — total PV power must be at least 1.3× the pump’s rated power. For the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump that means at least 390 Wp of solar panels (1 modern 400W+ panel. The 30% headroom absorbs the everyday losses — Cyprus summer heat reducing panel output, dust accumulating on the glass, resistance in the DC cabling, and the gradual ageing solar panels go through.
The Hybsun 3US300-35-4A DC solar stainless steel impeller well pump takes a PV string operating at 24-48 V Vmp, with maximum open-circuit voltage staying below 55 V. In practice that means a single modern 300-400 W panel works perfectly — typical panel Vmp is 30-40 V, well within range, and Voc stays under 50 V on most panels. For a slightly larger array you can wire two smaller panels in parallel. Total minimum array power: ≥ 390 Wp (1.3 × pump power per Hybsun’s sizing rule).
As with any submersible well pump, the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump’s actual flow rate depends on the lift height — the 4 m³/h figure is Hybsun’s peak rating at zero head, but real installations with depth and friction deliver less. The table below tracks what the manufacturer’s published performance curve actually shows for the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump across a range of head values, with daily output assuming a typical 6-hour Cyprus solar day:
“Total dynamic head” = static water level depth + pipe friction losses + vertical rise to your discharge tank. Pipe friction varies with pipe diameter and run length — for typical residential installations, allow 5-10m of friction loss on top of the static well depth.
Translating those flow rates into common Cyprus water uses:
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.
The 3US series exists specifically for Cyprus wells where the water carries sand, scale, or hard mineral content. Clean groundwater installs are well-served by the plastic-impeller 3UP range — different conditions, matched construction tier. The Hybsun 3US300-35-4A DC solar stainless steel impeller well pump uses AISI 304 stainless steel across the entire wet end — external jacket, stage casing, diffuser, the impeller itself, wear ring, strainer, screws. The shaft is AISI 431 (a higher-grade stainless for rotating duty). For Cyprus wells with hard water, this is the materials grade you want — it won’t scale, won’t crack, won’t wear out from sand abrasion over typical service life.
Same rotating hardware quality as the rest of the Hybsun premium range: NSK Japanese-brand industrial bearings (the default for continuous-duty pumping equipment) paired with an alloy mechanical seal, and a double-water-seal arrangement keeping the pump body sealed through years of submerged service. Hybsun summarises the design intent in its datasheet as “offering the longer working life” — the design objective for a pump that lives underwater.
The DC controller’s soft-start function ramps motor speed up gradually instead of slamming it on at full power. That eliminates the inrush-current spike that gradually destroys conventional AC motor windings over thousands of start/stop cycles — and it’s a key reason Hybsun comfortably offers a 2-year warranty on a pump designed for daily use.
If the well runs dry (which can happen on lower-yield boreholes during peak summer drawdown), the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump stops automatically and retries 30 minutes later. No manual reset. No burned-out motor. The pump handles this autonomously every time — meaning a borehole that occasionally pumps dry won’t damage the equipment.
Typical CGP 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 end-to-end installations across all five Cyprus districts — Nicosia, Limassol, Paphos, Larnaca and Famagusta.
CGP Solar specifies, supplies and installs the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump across Cyprus — Nicosia, Limassol, Paphos, Larnaca and Famagusta. We start with a borehole assessment, optionally arrange water-quality testing, calculate PV array sizing against your daily water demand, lower the pump on rising-main pipe with safety cable, and commission everything live under solar. Hard water + bright sunshine + Hybsun 3US300 = clean water for free, every sunny day, for years.
Contact us today to schedule your personalised free consultation.
FAQ’s
Hybsun lists H.Max as 35 metres, and the performance curve confirms it — at zero flow the pump reaches exactly 35 m of head. In practice, the useful working range is up to about 25 m total dynamic head, where the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump still delivers ~2 m³/h (about 12 m³/day on a typical 6-hour Cyprus solar day). Beyond 25 m, flow drops fast: at 30 m head you’re down to ~1.3 m³/h. For wells deeper than 25-30 m, the larger Hybsun 3US750-60/6C is the right choice — it pushes 6 m³/h to 60 m head.
Hybsun’s rule across the entire 3US range is at least 1.3 × pump power in solar panel wattage. For the 300 W 3US300, that’s a minimum of 390 Wp — so a single modern 400 W panel is enough, or two smaller panels totalling 400+ Wp. The PV string voltage needs to fall within the controller’s MPPT range: 24-48 V Vmp, with open-circuit voltage staying below 55 V. CGP Solar specifies the exact panel make and model during the quotation stage.
In two words: longevity and abrasion resistance. Plastic impellers (like the 3UP300 sibling pump) are purpose-built for installations on clean groundwater — efficient, cost-effective, and a perfect fit for that scenario. Stainless steel earns its premium specifically where the water carries abrasive content like sand, calcium scale, or hard mineral load that calls for harder construction. Cyprus rural wells often have all three. A stainless steel impeller — the Hybsun 3US300-35-4A DC solar stainless steel impeller well pump uses full AISI 304 — doesn’t wear that way. Same hydraulic envelope as the plastic-impeller version — the choice between them comes down to your well water chemistry. For wells with difficult water chemistry, this is the right choice..
The Hybsun 3US300-35-4A DC solar stainless steel impeller well pump comes with Hybsun’s standard 2-year manufacturer warranty. The pump is certified to CE (European Conformity — mandatory for EU sale including Cyprus) and ISO 9001 (Hybsun’s manufacturing quality management). The DC solar controller is rated IP65 — dust-tight and protected against water jets — suitable for pump house, basement, and exposed outdoor installations.
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