Ningxia, China / Solar + AC Hybrid Pumping
SP4015 Hybrid Solar Pump Inverter for 11kW Winter Water Pumping in Ningxia
This customer did not only need water at noon. The pump also had to keep working from late afternoon into the evening, when solar input was no longer enough on its own.
The Ningxia system used a SolarSeeker SP4015 15kW inverter, an 11kW pump, and 30 pieces of 550W solar panels wired as 15 in series and 2 strings in parallel. The hybrid input let solar power remain the first energy source while AC power filled the gap.
Model
SP4015
Inverter
380V / 15kW / 32A
Pump
11kW
PV array
30 x 550W
String plan
15S x 2P
Why Hybrid Input Was Needed
The difficult hours were 4 PM to 8 PM, not midday.
In summer and winter, Ningxia sites can still need water after the strongest sun has passed. Before this upgrade, the customer had to bring in diesel power whenever solar output became too weak late in the day.
Instead of adding frequent transfer switching, the SP4015 accepted solar and AC input together. Solar power stayed useful even when it was not enough to carry the full pump load, while AC power made up the shortage.
Running Check
The key check is late-day water output, not only a noon startup.
For a hybrid-input system, the practical question is whether the pump can keep using available solar energy while another AC source covers the shortage. That is the part that matters when irrigation or water supply continues after strong sunlight drops.
Field Sequence
Winter water output depended on the control method behind it
The outlet, inverter position, and field environment point to the same decision: keep solar as the first energy source, then let AC support the pump only when solar input falls short.
Control Choice
Hybrid input reduced the need for repeated switching.
Frequent transfer switching
- Requires extra switching equipment.
- More on/off actions can add after-sales risk.
- Solar energy can be wasted when the system changes source too early.
SP4015 hybrid input
- Solar remains the priority when available.
- AC power supplements the pump when solar is weak.
- Fewer switching actions means a cleaner control scheme for long running hours.
Hybrid System Path
Use the hybrid path only when the pumping schedule needs it
Need standard solar pump inverter matching?
Start with the pump voltage, phase, power, and rated current.
Need a 380V three-phase pump path?
Use this for SP4015 and similar high-power three-phase pump systems.
Need complete 380V system matching?
Check PV array, pump, cable distance, and protection as one system.
Need SolarSeeker to check hybrid input?
Send pump nameplate, daily pumping hours, AC source, panel model, and site photos.
FAQ
Questions from the Ningxia hybrid input project
What configuration was used in Ningxia?
The installed system used a SolarSeeker SP4015 15kW inverter, an 11kW pump, and 30 pieces of 550W panels arranged as 15 in series and 2 parallel strings.
Why was hybrid input important?
The customer needed pumping from late afternoon into evening. Hybrid input allowed solar to remain useful while AC power supplemented the pump when solar was not enough.
Is hybrid input the same as automatic transfer switching?
No. Hybrid input can use solar and AC together, which reduces the need for switching devices that repeatedly open and close during weak-sun hours.
What data is needed for a similar winter pumping system?
Send the pump nameplate, AC source, daily pumping hours, low-sun operating need, panel model, and local installation photos.
Need pumping after solar power starts to fall?
Send the pump nameplate, AC source, daily pumping hours, and panel data. SolarSeeker can check whether hybrid input is the right control path.