DOYIN 4SPS4.5-1500W (2.0HP) DC Solar Stainless Steel Submersible Pump — 1.25" Outlet

The DOYIN 4SPS4.5-1500W is a dependable 2.0HP DC solar submersible pump built with a stainless steel impeller for enhanced corrosion resistance in demanding borehole conditions. With a 1.25-inch outlet and a flow rate of 4.5m³/h (4,500 litres per hour), it delivers solid lifting capacity from a recommended depth of up to 135 metres, with a maximum head of 210M — the top model in DOYIN's DC stainless steel pump series.

The stainless steel impeller makes this pump particularly well suited to coastal boreholes in Mombasa, Malindi, Diani, Kilifi, and Lamu, where water can carry higher mineral content or mild salinity that would degrade an ordinary impeller more quickly. It fits domestic boreholes, small-to-mid farm irrigation, and community water points needing durable, corrosion-resistant performance from moderate borehole depths.

This model runs on a DC voltage range of 160–240V, requiring 4 solar panels wired in series (4 x 550W, roughly 2.2kW array) to reach the correct operating voltage. As a direct DC solar pump, it needs no batteries for daytime operation — water flows as soon as the sun is up, keeping the system low-maintenance for coastal homes and farms facing unreliable grid power.

CoastalSolar Africa supplies, sizes, and installs the 4SPS4.5-1500W pump with the correct panel configuration for your borehole depth and site conditions across the coastal region.

Specifications:

• Model: 4SPS4.5-1500W
• Power: 1500W (2.0HP)
• Impeller: Stainless steel
• Outlet size: 1.25 inches
• Max flow: 4.5m³/h (4,500L/h)
• Max head: 210M
• Recommended depth: 0–135M
• Voltage: DC 160–240V
• Ideal power / panel requirement: 4 x 550W solar panels (~2.2kW array, wired in series)
• Power source: DC direct-drive solar (no batteries required)
• Application: Domestic boreholes, small-to-mid farm irrigation, community water points

FAQs:

How many solar panels does the 4SPS4.5-1500W need?
This pump is rated for 4 x 550W panels (roughly 2.2kW total), wired in series to reach its 160–240V DC operating range.

Why choose the stainless steel impeller over an ordinary one?
Stainless steel offers better resistance to mineral content and mild salinity, extending pump lifespan in coastal borehole conditions found across Mombasa, Malindi, and Kilifi.

How does this compare to the ordinary impeller 4SDS5-1500W?
Both share a similar 4-panel setup and comparable depth performance, but the 4SPS4.5-1500W's stainless steel impeller offers greater durability in mineral-rich or slightly saline water, at a lower flow rate (4,500L/h vs 5,000L/h).

Do I need batteries for this pump?
No — it runs directly off solar panels during daylight hours. Batteries are optional if you need water access after sunset.

Do you install this pump in Kilifi and Malindi?
Yes, CoastalSolar Africa supplies and installs across Mombasa, Malindi, Diani, Kilifi, Lamu, and the wider coastal region, including correct panel sizing on-site.