DOYIN 4SF5-300-5500W (7.5HP) AD Hybrid Solar/3-Phase Submersible Pump — 1.5" Outlet

The DOYIN 4SF5-300-5500W is a powerful 7.5HP AD (hybrid) submersible pump capable of running on solar power or three-phase AC electricity, offering flexible, very-deep-borehole water delivery. With a 1.5-inch outlet and a flow rate of 8.4m³/h (8,400 litres per hour), it's built for demanding water needs from a recommended depth of up to 370 metres — a maximum head of 412M, among the deepest-rated pumps in the entire DOYIN catalog.

This pump suits large agricultural irrigation, commercial water supply, and major community borehole projects in areas with an exceptionally low water table. As an AD hybrid model, it can run on a solar array during daylight hours (DC 450–750V) and switch to three-phase AC power (380–460V) when solar output drops, giving properties in Mombasa, Malindi, Diani, Kilifi, and Lamu — as well as large inland agricultural operations — continuity of water supply regardless of weather or grid conditions.

Given its scale, the solar configuration requires a substantial array: DOYIN specifies 14 x 550W panels (roughly 7.7kW total) to reach the correct operating voltage — a significant investment best suited to large commercial or agricultural projects rather than domestic use.

CoastalSolar Africa supplies, sizes, and installs the 4SF5-300-5500W pump and its full solar array or 3-phase power setup, for large-scale, deep-borehole water projects across the coastal region and beyond.

Specifications:

• Model: 4SF5-300-5500W
• Power: 5500W (7.5HP), AD hybrid (Solar DC + 3-phase AC)
• Outlet size: 1.5 inches
• Max flow: 8.4m³/h (8,400L/h)
• Max head: 412M
• Recommended depth: 0–370M
• Voltage: DC 450–750V / AC 380–460V (3-phase)
• Ideal power / panel requirement: 14 x 550W solar panels (~7.7kW array)
• Power source: Hybrid — solar DC or 3-phase AC grid/generator backup
• Application: Large agricultural irrigation, commercial water supply, deep community boreholes

FAQs:

How many solar panels does this pump need?
It requires 14 x 550W panels, roughly 7.7kW total, to reach its 450–750V DC operating range.

Can this pump run on AC power only, without solar?
Yes, its AD hybrid design allows full operation on 3-phase AC power alone (380–460V) if a solar array isn't installed or available.

How does this compare to the 4SF5-230-4000W (5.5HP)?
The 4SF5-230-4000W has a slightly lower depth rating (max head 345M vs 412M) and lower power draw (13x450W panels vs 14x550W) — the 4SF5-300-5500W reaches the deepest boreholes in this 1.5" hybrid line.

What kind of projects is this pump suited for?
Given its scale (7.5HP, 412M max head, 8,400L/h flow), it's intended for large agricultural irrigation schemes, commercial water supply, or deep community boreholes rather than typical domestic use.

Do you supply and install pumps at this scale in coastal Kenya?
Yes, CoastalSolar Africa handles large-scale solar/hybrid pump installations, including full array design, across Mombasa, Malindi, Diani, Kilifi, Lamu, and larger agricultural sites further inland.