Solar Water Pump Sizing Chart by Well Depth

Before you choose a solar water pump by well depth, confirm the static water level first. Well depth is the total depth of the borehole, but static water level is the actual distance from ground level to the water surface. For sizing, static water level, pumping water level, and total head matter more than well depth alone.

For example, a 200m well with a static water level of only 60m does not need 200m of pumping head. In that case, a mid-head pump may be enough. When the static water level is very deep, you usually need submersible pumps for deep well applications. In some high-head pumping setups, a centrifugal pump for deep well use may also be considered, depending on flow rate, total head, and pipe losses.

Confirm Pump Type by Well Depth

After you confirm well depth and static water level, the next step is choosing the right pump type by well depth. Among different types of pumps, each fits different water sources and head ranges—and choosing the wrong type is more likely to cause no water flow than choosing the wrong wattage. Based on the Flowatt Solar Water Pumps lineup, use the guide below.

1. Shallow wells: ponds and rivers (about 0–30m)

Start with solar surface pumps or solar shallow well pumps. They suit shallow sources, horizontal transfer, and irrigation lift. Common Flowatt surface options include 24V 250W (about 25m), 36V 400W (about 40m), 48V 550W, and 72V 750W—for low head and steady flow. For pressure boosting, spraying, or short-distance supply, choose solar diaphragm pumps.

2. Medium to deep wells (about 30–300m)

Among different types of pumps, this range usually needs a solar deep well pump. The pump sits in the borehole and lifts water to a tank or pipeline for home supply, small-farm irrigation, and livestock watering—the main use case for submersible pumps for deep well service. In the common 30–100m zone,

Flowatt solar deep well pumps (150W–3000W) cover many daily needs. For 100–300m wells, stay with deep-well submersibles but raise head and power: select from deep well pumps using static water level and daily demand, and make sure max head covers total head with a safety margin.

3. Ultra-deep wells: high head (about 300m+, or high-flow projects)

Consider a High Power Solar Well Pump (3kW–33kW) for deeper boreholes, higher head, or larger agricultural and community water projects. Some high-head setups also follow a centrifugal pump for deep well approach, but final sizing should still follow static water level, flow rate, and pipe losses.