DOYIN DC Controller 800W (DYS-90)

The DOYIN DYS-90 is an 800W DC controller built specifically for solar-only submersible water pumps, managing power delivery from your solar array directly to the pump motor without any grid-power switching capability. It's a dependable, lower-cost control option for off-grid coastal properties in Mombasa, Malindi, Diani, Kilifi, and Lamu where the pump will run purely on solar throughout its operating life.

Rated for 800W pump systems, the DYS-90 is matched to DOYIN's 1.0HP DC submersible pump models — including the 4SDS5-800W (1.0HP) and 4SPS4.5-800W (1.0HP, stainless steel impeller) pumps, both of which run on a DC voltage range of 90–160V and pair with a 2 x 550W solar array. Always confirm your specific pump model's wattage and voltage match this controller before installation, as running a pump with a mismatched controller can damage the motor.

This controller suits domestic boreholes and household water points where solar is the sole power source and grid backup isn't required or available.

CoastalSolar Africa supplies and installs the DYS-90 DC controller, matched correctly to your DOYIN pump model and solar array, across the coastal region.

Specifications:

• Model: DYS-90
• Type: DC-only Pump Controller (solar power, no grid switching)
• Rated power: 800W
• Compatible with: DOYIN 4SDS5-800W (1.0HP) and 4SPS4.5-800W (1.0HP) DC pumps, voltage range DC 90–160V
• Matched solar array: 2 x 550W panels (per pump's ideal power rating)
• Application: Domestic borehole pump systems (solar-only)

FAQs:

What's the difference between the DYS-90 and DYS-90AD?
The DYS-90 is DC-only and works with solar power alone. The DYS-90AD is a hybrid version that can also switch to grid (AC) power as backup.

Which DOYIN pumps use the DYS-90 controller?
It's matched to 800W (1.0HP) DC pump models in the DOYIN range, including the 4SDS5-800W and the stainless steel impeller 4SPS4.5-800W, both requiring a 90–160V DC input from roughly 2 x 550W solar panels.

Can I add grid backup later with this controller?
No — the DYS-90 is DC-only. If you may need grid backup in future, the hybrid DYS-90AD is the better choice from the outset.

Do I need to match the exact voltage range?
Yes, correct voltage matching between panels, controller, and pump is essential — CoastalSolar Africa can confirm your array configuration before installation.

Do you supply and fit this controller in Kilifi and Malindi?
Yes, CoastalSolar Africa supplies and installs the DYS-90 controller, correctly matched to your pump model and solar array, across Mombasa, Malindi, Diani, Kilifi, Lamu, and the wider coastal region.