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.<\/p>\n
\n
1. Confirm Your Pump\u2019s Basic Parameters<\/h2>\n
Before selecting an inverter, check your pump\u2019s nameplate for these three key details:<\/p>\n
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- Fuerza<\/strong>: Measured in Watts (W) or Kilowatts (kW).<\/li>\n
- Voltaje<\/strong>: Single-phase pumps are typically 220V\/240V; Three-phase pumps are typically 380V\/400V\/440V.<\/li>\n
- Fase<\/strong>: Is it Single-Phase or Three-Phase?<\/li>\n<\/ul>\n
![\"Hobertek](\"https:\/\/hobertek.com\/wp-content\/uploads\/2026\/05\/hober-solar-pumping-diagram.png\")
\nFigure 1: Understanding how the inverter integrates into the total pumping system.<\/em><\/p>\n
\n2. Understanding HOBER Model Nomenclature<\/h2>\n
Our model numbers follow the rule: HSPH-XXXX-H\/L-B<\/strong><\/p>\n
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- HSPH<\/strong>: Hybrid Solar Pump Inverter (Supports both Solar & AC input).<\/li>\n
- XXXX<\/strong>: Power rating. Numbers without "K" are Watts (e.g., 2200 = 2200W); with "K" are Kilowatts (e.g., 11KH = 11kW).<\/li>\n
- H\/L<\/strong>: Voltage type. h<\/strong> for Three-Phase (380V+), L<\/strong> for Single-Phase (220V).<\/li>\n
- B (Optional)<\/strong>: Built-in Booster<\/strong>. Models with a "B" allow for 1:1 precise power matching without needing to "oversize" the inverter.<\/li>\n<\/ul>\n
\n3. Core Selection Rules<\/h2>\n
According to HOBER expert engineering standards, selection should follow this logic:<\/p>\n
The Power Rule<\/strong><\/h3>\n
Your goal is to satisfy: $\\text{Pump Power} \\le \\text{Inverter Power} \\le 1.2 \\times \\text{Pump Power}$.<\/p>\n
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- Standard Models<\/strong>: Choose the model that is the next size up from your pump power. For example, for a 4kW three-phase pump, choose the HSPH5500H<\/strong> (5.5kW).<\/li>\n
- Booster Models ("B")<\/strong>: If the inverter includes a built-in booster, you can match the power exactly 1:1.<\/li>\n<\/ul>\n
Type Matching<\/strong><\/h3>\n
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- Single-Phase Pump (220V)<\/strong>: Must use an L-type<\/strong> inverter (e.g., HSPH2200L).<\/li>\n
- Three-Phase Pump (380V+)<\/strong>: Must use an H-type<\/strong> inverter (e.g., HSPH3700H).<\/li>\n<\/ul>\n
![\"Hober](\"https:\/\/hobertek.com\/wp-content\/uploads\/2026\/04\/hober-solar-pumping-diagram.png\")
\nHobertek inverters are designed to handle high starting torques of industrial pumps.<\/em><\/p>\n
\n4. Considerations for Deep Well vs. Surface Pumps<\/h2>\n
While electrical power is the main driver, the application environment matters:<\/p>\n
Bombas para pozos profundos<\/strong><\/h3>\n
Deep wells have high head requirements and heavy starting loads. We strictly advise the "One Size Up"<\/strong> rule to ensure enough starting torque. <\/p>\n
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- Consejo profesional<\/strong>: If your cable length exceeds 150 meters, we recommend adding an output reactor or filter<\/strong> at the inverter output to protect the motor insulation.<\/li>\n<\/ul>\n
Bombas de superficie<\/strong><\/h3>\n
For surface pumps (like horizontal or vertical multi-stage pumps), the MPPT mode is often best set to PID mode<\/strong> during commissioning for smoother operation.<\/p>\n
\n5. Quick Selection Examples<\/h2>\n
\n\n
\n \nPump Parameters<\/th>\n Recommended Inverter<\/th>\n Logic<\/th>\n<\/tr>\n<\/thead>\n \n 1000W Single-Phase (220V)<\/strong><\/td>\n HSPH1500L (1.5kW)<\/strong><\/td>\n Next available single-phase size above 1000W.<\/td>\n<\/tr>\n \n 2.2kW Three-Phase (380V)<\/strong><\/td>\n HSPH3700H (3.7kW)<\/strong><\/td>\n Next available three-phase size for stability.<\/td>\n<\/tr>\n \n 15kW Three-Phase (380V)<\/strong><\/td>\n HSPH18.5KH (18.5kW)<\/strong><\/td>\n Follows "one size up" for high-power stability.<\/td>\n<\/tr>\n \n 750W Single-Phase (220V)<\/strong><\/td>\n HSPH750LB (750W)<\/strong><\/td>\n Booster "B" allows for exact 1:1 matching.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n6. Environmental and Solar Configuration<\/h2>\n
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- Altitude<\/strong>: If your project is above 1000 meters, the thinner air reduces cooling efficiency. You must<\/strong> derate the inverter (select a significantly larger power rating).<\/li>\n
- Solar Array Sizing<\/strong>: To ensure the pump runs reliably even in weak light, your total solar panel power should be roughly 1.5 times<\/strong> the pump power.<\/li>\n<\/ul>\n
- Altitude<\/strong>: If your project is above 1000 meters, the thinner air reduces cooling efficiency. You must<\/strong> derate the inverter (select a significantly larger power rating).<\/li>\n
- Three-Phase Pump (380V+)<\/strong>: Must use an H-type<\/strong> inverter (e.g., HSPH3700H).<\/li>\n<\/ul>\n
- Booster Models ("B")<\/strong>: If the inverter includes a built-in booster, you can match the power exactly 1:1.<\/li>\n<\/ul>\n
- XXXX<\/strong>: Power rating. Numbers without "K" are Watts (e.g., 2200 = 2200W); with "K" are Kilowatts (e.g., 11KH = 11kW).<\/li>\n
- Voltaje<\/strong>: Single-phase pumps are typically 220V\/240V; Three-phase pumps are typically 380V\/400V\/440V.<\/li>\n
![\"Solar](\"https:\/\/hobertek.com\/wp-content\/uploads\/2026\/04\/solar-pump-inverter-sizing-tool-1.png\")