Philippines Project Case / SP401855 IP55
Isabela Philippines SP401855 IP55 Solar Pump Inverter Project for a 15kW Irrigation Pump
This Isabela project used a SolarSeeker SP401855 IP55 solar pump inverter for a 15kW three-phase irrigation pump. The engineering target was clear: handle humid field conditions, reduce cabinet work, and keep the pump protected during low sunlight, dry running, and water-level changes.
|
18.5kW / 380V / 37A
|
15kW pump load
|
45 x 550W PV panels, 15S3P
Why this project needed IP55
- Humid field conditions in the Philippines made cabinet protection a real selection issue.
- The customer wanted lower installation time and fewer cabinet components.
- Protection settings were prepared before shipment to reduce pump and service risk.
Project Requirement
The project was not only about starting a pump. It had to survive a humid outdoor job.
The customer needed solar pumping equipment for agricultural irrigation in Isabela, Philippines. The site used a 15kW pump, so the inverter had to provide stable 380V three-phase output while working with a 45-panel PV array.
The local requirement was tougher than a simple indoor inverter job. The project called for a protection level suitable for humid conditions, high ambient temperature, and long service time. A normal IP20 inverter would usually need an extra control cabinet, more wiring work, and more inspection points.
SolarSeeker recommended the SP401855 IP55 inverter so the customer could reduce extra cabinet work and finish installation faster while keeping the inverter protected in the field.
Confirmed project facts
Location: Isabela, Philippines
Model: SolarSeeker SP401855, IP55
Inverter output: 380V, 18.5kW, 37A, three phase
Pump load: 15kW irrigation pump
PV array: 45 pieces of 550W panels, 15 in series and 3 parallel strings
System Configuration
SP401855 setup used for the 15kW irrigation pump
The important selection points were not only inverter power and pump power. The team also had to check PV string design, protection functions, high-temperature operation, and whether the IP55 enclosure could reduce cabinet work on site.
| Country and site | Isabela, Philippines, agricultural irrigation site |
|---|---|
| Customer requirement | Outdoor solar pumping system for humid conditions, lower installation time, and reduced cabinet cost |
| Solar pump inverter | SolarSeeker SP401855 IP55 solar pump inverter |
| Inverter rating | 380V, 18.5kW, 37A, three-phase output |
| Pump load | 15kW water pump for agricultural irrigation |
| PV array | 45 pieces of 550W solar panels, arranged as 15S3P |
| Protection preparation | Low-frequency protection, dry-run protection, water-level control, and solar-condition auto judgment prepared before shipment |
| Reported result | The inverter, pump, cables, cabinet-side equipment and water system have operated for 4 years without reported faults. |
IP55 Hardware Photos
IP55 enclosure, display and cable-gland details from the project
The project photos focus on the parts that matter most for humid outdoor use: the inverter body, operating display, sealed enclosure detail, and cable-gland area.
Before Shipment
The protection setup was part of the engineering work, not an afterthought.
For a solar water pump, unstable sunlight can make a system start and stop repeatedly if the inverter is not set correctly. That repeated start behavior can stress the pump, create service calls, and slow down the installer team.
Before shipping the inverter to the Philippines, SolarSeeker prepared low-frequency protection, dry-run protection, water-level control, and solar-condition auto judgment. The goal was to let the inverter decide when there was enough solar energy to run the pump instead of forcing weak starts.
Low-frequency protection
Helps avoid weak pump operation when available solar power is not enough for stable running.
Dry-run protection
Reduces pump damage risk when water conditions are not suitable for normal pumping.
Water-level control
Allows the pumping system to respond to water-level conditions instead of running blindly.
Solar-condition judgment
Helps the inverter reduce repeated starts when sunlight is too weak for useful pumping.
Operating Result
Four years without reported faults changed the value of the project for the installer.
The project has been running for 4 years. The inverter, pump, cables, cabinet-side equipment and water system have not had reported fault issues during that period.
For the installation team, that result matters commercially. Fewer after-sales trips mean less time lost, lower service cost, and a stronger reputation when bidding or supporting the next Philippines government water project.
What a similar buyer should send
Pump data: voltage, phase, power, rated current, head and flow target.
Site condition: humidity, outdoor exposure, cabinet plan and cable distance.
PV plan: panel wattage, series/parallel design and available mounting space.
Protection needs: dry-run risk, water-level control, low-light behavior and service access.
Engineering Path
Pages to check before a similar IP55 solar pumping project
Start from the inverter range, then check 380V SP4 selection, cabinet needs, pump selection and complete kit planning based on the real site environment.
Solar Water Pump Inverter
Main hub for inverter range, voltage selection and project matching.
Open inverter hub
SP4 380V Inverter
For 380V three-phase pump projects such as this 15kW irrigation pump.
View SP4
Solar Pump Cabinet
For projects that still need cabinet integration, protection or site wiring support.
Check cabinet
Submersible Pump
For pump body, well condition, head, flow and motor matching.
Select pump
Pump Kits
For panel, inverter/controller, pump and accessory package planning.
View kits
FAQ
Questions before quoting a similar IP55 solar water pump system
Why did this Isabela project use an IP55 inverter?
The project had to work in humid Philippines field conditions and reduce extra cabinet work. An IP55 inverter helped protect the inverter body while lowering installation time and cabinet cost compared with a normal IP20 inverter plus external cabinet.
What inverter and pump were used?
The project used a SolarSeeker SP401855 IP55 inverter rated at 380V, 18.5kW and 37A, driving a 15kW three-phase irrigation pump.
How was the PV array configured?
The PV array used 45 pieces of 550W solar panels, arranged as 15 panels in series and 3 parallel strings.
Can the same SP401855 setup be copied to another farm?
Not directly. SolarSeeker still needs the pump nameplate, rated current, head, flow target, PV panel data, cable distance and site condition before confirming whether SP401855 is the right model.
Need an IP55 solar pump inverter for a humid outdoor site?
Send the pump nameplate, PV panel plan, site photos, humidity or cabinet requirements, and protection needs. SolarSeeker will check the inverter model, PV stringing and protection settings before shipment.