How to Build a Starter Stock of Water Pump VFDs

Build a starter stock from the pumps customers already buy, not from the complete VFD catalogue. Rank recent pump sales by motor voltage, rated current, power and application; stock the few configurations that cover repeat demand, then expand only after real orders show a gap.

What Information Is Required?

• Pump sales by motor power, voltage, rated current and motor type.
• Local single-phase and three-phase supply conditions.
• Main applications, such as booster, borehole or irrigation pumps.
• Expected monthly demand and seasonal changes.
• Supplier replenishment time and minimum-order conditions.
• Required sensors, accessories, demonstration units and service spares.
• Installer capability and the number of variants the team can support.

Selection Example

A dealer's recent orders are mainly 2.2 kW, 4 kW and 5.5 kW 380 V booster pumps, with occasional 7.5 kW projects. It should first check the actual current range within each power group. The recurring ratings can form the core stock, while the less frequent rating remains project-ordered until demand is proven.

Keep supply variants and motor types as separate controlled items. A sample or demonstration unit can verify the typical pressure-sensor and constant-pressure setup before customer deliveries begin.

Common Mistakes

• Buying equal quantities of every available VFD rating.
• Forecasting by kW while ignoring differences in motor current.
• Mixing single-phase and three-phase input variants under one stock code.
• Adding too many enclosure, voltage or branding variants at launch.
• Forgetting sensors, spare units, manuals and parameter backups.

AUSENIST Solution

AUSENIST can review a distributor's pump range and local voltage to map suitable YS620 or YS820 candidates for sample validation and starter-stock planning. The stock proposal can separate repeat items from project-specific or special-voltage configurations and define which motor data is required before sale.

Final quantities should come from the distributor's verified sales history, cash-flow limits and replenishment plan. AUSENIST should not estimate local demand without that evidence, and models outside confirmed electrical or application limits should not be stocked as substitutes.

Tell us your main pump power range and local voltage. We can recommend a starter stock list and distributor pricing.