SP2 Single Phase to Three Phase Solar Pump Inverter
SP2 is built for small 220V three phase pumps when the site only has 220V single phase power or solar input. It helps pump dealers, installers, and irrigation contractors keep the three phase pump plan without adding a separate phase converter cabinet.
Quick Decision
SP2 solves one clear problem: three phase pump, single phase site
SP2 is not a general 220V inverter page. It is the model to check when the pump is 220V three phase, but the project site does not have three phase utility power.
220V single phase site
Use SP2 when the available input is 220V single phase grid power or solar input.
220V three phase pump
SP2 outputs 220V three phase for small pump motors in the 0.75-3kW range.
Retrofit pump projects
Keep the existing three phase pump plan instead of changing to a new single phase pump.
Not for 380V pumps
For 380V three phase or larger irrigation systems, use SP4 instead.
Model Selection
SP2 model selection guide for 1-4HP pumps
Choose the SP2 model from pump power and rated current. For phase conversion projects, rated current and starting load matter more than HP alone, so send the nameplate before ordering.
| Model | Motor Power | Input Current | Output Current | Suggested PV Power | Typical Application |
|---|---|---|---|---|---|
| SP2-0.75 | 1HP / 0.75kW | 4.5A | 3.4A | 1.5kW | Small residential wells |
| SP2-1.5 | 2HP / 1.5kW | 8.0A | 6.8A | 3.0kW | Residential and light agriculture |
| SP2-2.2 | 3HP / 2.2kW | 11.5A | 10.0A | 4.4kW | Medium irrigation pump |
| SP2-3.0 | 4HP / 3.0kW | 15.2A | 13.6A | 6.0kW | Large small-farm pump |
Sizing note
For a first estimate, use PV array power around motor power x 2.0 in phase conversion systems. SolarSeeker should still confirm the final array from pump current, head, flow, sunlight, and cable distance.
Why SP2 Exists
Keep the three phase pump instead of redesigning the whole system
A project may already have a 220V three phase pump because the pump is efficient, available locally, or already installed. SP2 helps solve the power mismatch so the customer does not need to replace the pump or build a separate phase conversion cabinet.
Useful for retrofit projects
Add solar pumping control to an existing small three phase pump system.
Useful for rural sites
Run a 220V three phase pump where three phase utility power is not available.
Useful for pump dealers
Offer one solution path when customers bring a three phase pump but only have single phase supply.
Field Commissioning
Easier commissioning for phase conversion pump projects
SP2 combines phase conversion, MPPT solar pumping, and pump protection in one device. It is designed for small pump systems where installers need fewer settings and clearer model boundaries.
Simplified operation interface
For standard pump matching, installers can focus on nameplate data, wiring, and water conditions instead of working through long parameter lists.
Start waiting function
SP2 waits until solar power is enough before starting, reducing repeated weak-sunlight startup attempts in the morning or under passing clouds.
50°C operation
SP2 is designed for hot field sites, pump rooms, and cabinet installations where ambient temperature is higher than normal indoor use.
Technical Parameters
SP2 technical specifications
These parameters are for small 220V three phase pump applications. If the pump voltage, current, or wiring method is uncertain, send the nameplate before shipment.
| AC input | 220V single phase |
| Solar DC input | 170-800V DC |
| Output | 220V three phase |
| Motor range | 0.75-3kW / 1-4HP |
| Protection | Over-current, over-voltage, dry-run, thermal and pump protection |
| Operating temperature | Up to 50掳C |
| Warranty | 3 years standard warranty |
Comparison
SP2 vs a traditional phase converter
A normal phase converter is built for general motor loads. SP2 is built for solar pump operation, so the phase conversion function is combined with MPPT control, pump protection, and solar startup logic.
| Selection Factor | SP2 Solar Pump Inverter | Traditional Phase Converter |
|---|---|---|
| Main job | Run 220V three phase pump from single phase or solar input | Create three phase power for general motor use |
| Solar MPPT | Built in | Usually not available |
| Pump protection | Included for solar pumping conditions | Depends on external protection design |
| System complexity | One controller path for pump and solar control | Often needs separate controller and protection parts |
| Best use | Small solar pump projects and rural retrofit sites | Workshop or non-solar motor applications |
Before Quotation
What pump information should you send?
For SP2, the pump phase and voltage matter more than usual. A clear nameplate photo prevents wrong model selection and avoids site commissioning problems.
Pump voltage and phase
Confirm the pump is 220V three phase.
Rated power and current
Select SP2-0.75, SP2-1.5, SP2-2.2, or SP2-3.0.
Head and flow
Check whether the pump operates inside the expected range.
PV array and site
Send panel wattage, quantity, cable distance, and project country.
Related Product Path
Compare SP2 with the correct SolarSeeker product path
If the pump voltage or phase is different, another SolarSeeker model will be safer. Use the links below to avoid treating every 220V project as a phase conversion project.
SP1 220V Single Phase
For 220V single phase pumps. No phase conversion is needed.
SP3 220V Three Phase
For 220V three phase pump systems where phase conversion is not required.
SP4 380V Three Phase
For 380V three phase and larger irrigation or deep well projects.
Solar Pump Inverter Hub
Compare SP1, SP2, SP3, SP4 and controller options by pump type.
FAQ
SP2 single phase to three phase solar pump inverter FAQ
What is SP2 used for?
SP2 is used when a project has a 220V three phase pump but the site only has 220V single phase power or solar input. It converts the power path and controls the pump with MPPT solar pumping logic.
Can SP2 run a 380V three phase pump?
No. SP2 outputs 220V three phase. For 380V three phase pumps, use the SolarSeeker SP4 380V three phase solar pump inverter.
When should I choose SP3 instead of SP2?
Choose SP3 when the pump system is already a normal 220V three phase solar pump project and phase conversion is not the main problem. Choose SP2 when the site input is single phase but the pump is three phase.
What SP2 model should I choose for a 2.2kW pump?
For a typical 2.2kW or 3HP 220V three phase pump, SP2-2.2 is the first model to check. SolarSeeker should confirm rated current, head, flow, and PV array before final quotation.
Is SP2 the same as a normal phase converter?
No. A normal phase converter only creates a three phase output. SP2 is designed for solar pump systems, so it also includes MPPT control, pump protection, frequency control, and automatic startup logic.
What information should I send for an SP2 quotation?
Send a clear pump nameplate photo, pump power, voltage, phase, rated current, total head, flow requirement, cable distance, solar panel plan, and project country.
Before Quotation
Send These Details Before Quotation
SP2 is for the mismatch between a three phase pump and a single phase or solar site. Send both pump and supply details before quotation.
Confirm the project is really a phase conversion job
Check current margin before choosing SP2 size
Avoid using SP2 where SP1, SP3 or SP4 is the better route
Three phase pump nameplate
Send pump voltage, phase, kW or HP, rated current and frequency from the motor plate.
Input supply condition
Tell us if the site has single phase grid, solar-only input, generator backup or a hybrid plan.
Conversion requirement
Explain why single-to-three phase conversion is needed and whether the original pump must be kept.
PV or backup design
Panel data and backup power details help us check the operating range before quotation.
Wiring and protection
Share cable distance, cabinet requirement, pump room condition and whether installers need wiring support.
Order scope
Sample, retrofit project, dealer package or repeat order affects accessories and support requirements.
Simple message format: three phase pump nameplate + single phase supply condition + PV/backup plan + site details + quantity. If some data is missing, send what you have first and SolarSeeker can help check the rest.
Ready to check whether SP2 fits your pump?
Send the pump nameplate and site power condition. SolarSeeker will confirm whether SP2 is the right path or whether SP1, SP3, or SP4 is safer.