Quanzhou Ausenist Technology Co., Ltd YS620 vs YS820 Pump VFD Full Comparison: Technical Differences, Price Positioning & Customer Selection Suggestions
Ausenist launches two core pump inverter series: YS620 and YS820. Many overseas distributors, pump OEM manufacturers and engineering integrators confuse the applicable scenarios of the two models. This article sorts out all differences, shared functions and targeted selection recommendations based on official technical documents, helping global customers quickly lock the most cost-effective drive model matching their project demands.
1. Core Technical Difference 1: RS485 Communication Port Configuration
Communication interface is the most critical distinguishing feature of the two series, especially for low-power 220V models widely used in small irrigation pumps and domestic water supply equipment:
- YS620 Series (0.75kW ~7.5kW): Dual RS485 ports for all power grades. Two independent communication channels can undertake multi-pump parallel linkage and remote upper computer monitoring at the same time, with strong anti-interference performance for large centralized water supply stations.
- YS820 Series:
- 0.75kW & 2.2kW 220V low power: Single RS485 port, only supports single signal transmission
- All 380V high-power models of YS820 adopt dual RS485, consistent with YS620 specificationFor projects requiring PLC centralized monitoring, multi-group pump interlock control and remote cloud data upload, YS620 dual RS485 design is the mandatory choice.
2. Core Technical Difference 2: Power Coverage Range
- YS620: Power range from 0.75kW to 7.5kW, focusing on small and medium pump sets: household water supply, small farm irrigation, single fire booster pump, OEM supporting miniature pumps
- YS820: Power range expands from 0.75kW to 22kW, covering large industrial water supply, municipal multi-pump stations, large agricultural irrigation systems with high total power demand
3. Shared Standard Functions of YS620 & YS820
Both series retain all core pump-dedicated intelligent functions, with consistent hardware protection grades and installation design:
- Protection Grade: IP54 dustproof and waterproof, supporting backpack direct mounting on all brand pump motors
- Dual Motor Compatibility: Universal for permanent magnet synchronous motor (PMSM) and asynchronous induction motor (IM)
- Multi-Pump Group Control: Support dual main pump backup, timed alternating pump running, fault pump automatic skip
- Full Safety Protection Suite: Anti-freeze anti-rust, water shortage protection, pipe burst shutdown, phase loss protection, soft start anti-water hammer
- Global Voltage Adaptation: Standard 208–230V / 460V stock models, 440V/460V custom available with MOQ 10
- Unified Sensor Wiring Rule: Red wire to 24V, black wire to common C terminal, unified five-way valve customized interface service
4. Market Positioning & Price Gap
- YS620: Medium-high positioning, stronger communication expandability, higher unit price, oriented to engineering integrators and system projects with high monitoring demands
- YS820: Cost-effective economical model, single RS485 at low power segment, lower procurement cost, suitable for small pump OEM, retail distributors and simple independent pump control without remote monitoring requirements
5. Target Customer & Scenario Selection Advice
Choose YS620 If You Meet Any Condition:
- Projects need multi-pump parallel linkage with remote PLC monitoring
- Main market is Latin American municipal fire protection and large farm irrigation stations
- Customers require stable dual-channel communication signal for long-distance control
- Power demand is within 0.75kW–7.5kW, focusing on system reliability and expandability
Choose YS820 If You Meet Any Condition:
- Simple single pump or small 2–3 pump group without centralized remote monitoring
- Need power above 7.5kW up to 22kW for large industrial pump equipment
- Small pump OEM manufacturers pursuing lower supporting cost, only local pressure control required
- Distributors targeting retail end users with basic constant pressure demand
Supporting Multilingual Materials & Business Follow-Up
Both series are equipped with Spanish operation manuals and Spanish quotation PDF files for Panama and Latin American markets. Sales teams record customer power demand, communication function requirement and budget range in the shared Kdocs VFD business follow-up sheet to recommend matching series accurately. When customers place custom voltage orders, the 10-unit minimum order quantity rule applies to both YS620 and YS820.
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