How to Choose the Right HOBER Solar Pump Inverter: A Complete Selection Guide
Choosing the right solar pump inverter for your deep well or surface pump is critical for system longevity and water output efficiency. At HOBER, with 16 years of R&D and manufacturing experience, we follow a core engineering principle: The inverter power must be greater than or equal to the pump power.
In most cases, we recommend selecting "one size up" to ensure maximum system stability. Here is our professional step-by-step guide to making the right choice.
1. Confirm Your Pump’s Basic Parameters
Before selecting an inverter, check your pump’s nameplate for these three key details:
- Pouvoir: Measured in Watts (W) or Kilowatts (kW).
- Tension: Single-phase pumps are typically 220V/240V; Three-phase pumps are typically 380V/400V/440V.
- Phase: Is it Single-Phase or Three-Phase?
Figure 1: Understanding how the inverter integrates into the total pumping system.
2. Understanding HOBER Model Nomenclature
Our model numbers follow the rule: HSPH-XXXX-H/L-B
- HSPH: Hybrid Solar Pump Inverter (Supports both Solar & AC input).
- XXXX: Power rating. Numbers without "K" are Watts (e.g., 2200 = 2200W); with "K" are Kilowatts (e.g., 11KH = 11kW).
- H/L: Voltage type. H for Three-Phase (380V+), L for Single-Phase (220V).
- B (Optional): Built-in Booster. Models with a "B" allow for 1:1 precise power matching without needing to "oversize" the inverter.
3. Core Selection Rules
According to HOBER expert engineering standards, selection should follow this logic:
The Power Rule
Your goal is to satisfy: $\text{Pump Power} \le \text{Inverter Power} \le 1.2 \times \text{Pump Power}$.
- Standard Models: Choose the model that is the next size up from your pump power. For example, for a 4kW three-phase pump, choose the HSPH5500H (5.5kW).
- Booster Models ("B"): If the inverter includes a built-in booster, you can match the power exactly 1:1.
Type Matching
- Single-Phase Pump (220V): Must use an L-type inverter (e.g., HSPH2200L).
- Three-Phase Pump (380V+): Must use an H-type inverter (e.g., HSPH3700H).
Hobertek inverters are designed to handle high starting torques of industrial pumps.
4. Considerations for Deep Well vs. Surface Pumps
While electrical power is the main driver, the application environment matters:
Pompes pour puits profonds
Deep wells have high head requirements and heavy starting loads. We strictly advise the "One Size Up" rule to ensure enough starting torque.
- Conseil de pro: If your cable length exceeds 150 meters, we recommend adding an output reactor or filter at the inverter output to protect the motor insulation.
Pompes de surface
For surface pumps (like horizontal or vertical multi-stage pumps), the MPPT mode is often best set to PID mode during commissioning for smoother operation.
5. Quick Selection Examples
| Pump Parameters | Recommended Inverter | Logic |
|---|---|---|
| 1000W Single-Phase (220V) | HSPH1500L (1.5kW) | Next available single-phase size above 1000W. |
| 2.2kW Three-Phase (380V) | HSPH3700H (3.7kW) | Next available three-phase size for stability. |
| 15kW Three-Phase (380V) | HSPH18.5KH (18.5kW) | Follows "one size up" for high-power stability. |
| 750W Single-Phase (220V) | HSPH750LB (750W) | Booster "B" allows for exact 1:1 matching. |
6. Environmental and Solar Configuration
- Altitude: If your project is above 1000 meters, the thinner air reduces cooling efficiency. You must derate the inverter (select a significantly larger power rating).
- Solar Array Sizing: To ensure the pump runs reliably even in weak light, your total solar panel power should be roughly 1.5 times the pump power.
Don’t guess—use our professional sizing tool for the perfect match.
Need help with your specific project?
As an ISO9001-certified manufacturer, HOBER provides free technical assessments and customized design solutions. Contact our engineering team today to get your customized Estimation Letter.
