SI23-D3-004G-A PV gibrid Variable frequency drives SI23 3.7 kW 1x220

SI23-D3-004G-A is a Veichi SI23 solar pump inverter rated 3.7 kW, three-phase 220 V output, with a rated output current of 16 A. It pumps water straight from the solar panels using a maximum power point tracker (MPPT), with a grid top-up when sunlight is weak. This frame size suits a pump of about 3.7 kW. We size the build around the pump motor and your solar array voltage, so if you are unsure about current or phase, send us the panel and pump parameters and we will advise the exact frame.

Typical applications:

• Borehole pump for drip/sprinkler irrigation of a small field
• Drinking water for a farm or household, sun-powered
• Pond aeration, livestock watering, fountain

Note: The D3 build has a three-phase 220 V output for a three-phase 220 V pump motor; the single-phase 220 V here is only the grid-complement input, not the motor side. It runs directly off the solar array (DC) with built-in MPPT; a grid top-up is available when sunlight is weak. No built-in EMC filter.

Veichi SI23 Solar Pump Inverters — Flagship Multi-Source Controls with Automated Seamless AC/DC Mixing

The Veichi SI23 solar pump inverter series represents the absolute flagship range in VEICHI’s renewable energy portfolio. Built on the rugged, time-tested hardware platform of the heavy-duty AC310 industrial variable frequency drive, the SI23 range covers motor power outputs from 0.75 to 710 kW. Featuring revolutionary dynamic hybrid source mixing (AC/DC Dual Supply, configured in parameter F14.00 with mode value 82), the SI23 maximizes green energy extraction from PV solar arrays while seamlessly drawing backup power from the AC grid utility or diesel generators during heavy overcast conditions or nighttime hours.

Typical Applications for Veichi SI23

• Large-Scale Pivot Irrigation: Perfectly suited to drive high-power circular and linear agricultural sprayers requiring stable flow pressure despite passing cloud cover.
• Municipal and Regional Water Pumping: The intelligent AC/DC mixing algorithm enables B2B water utilities to drastically reduce electrical utility costs while maintaining uninterrupted 24/7 water supply.
• Livestock and Industrial Enclosures: Delivers reliable performance for high-power submersible bore pumps filling large water reservoirs.

What Differentiates Veichi SI23 from Competitors

The primary technological benefit of the SI23 is its built-in seamless automatic backup transfer (AVR), allowing the drive to compensate for PV power drops on the fly without halting pump rotation or requiring expensive external switching logic.

When Veichi SI23 is NOT Suitable

• For simple low-power domestic garden watering where a full-scale industrial drive is not financially justified — select the Veichi SI22.
• If the installation layout strictly demands direct outdoor wall mounting exposed to weather without a secondary enclosure — select the waterproof Veichi SI30 (IP65).

Our Dynamic Field Observations

The Veichi SI23 is the most robust and fault-tolerant solar pump inverter we have deployed across large-scale agricultural sectors in Ukraine. The drive supports a unique **pump cleaning function** (mode value **2** in tens place of parameter **F14.00**) — when activated, it runs the pump at cleaning frequency **F14.57** forward (**F14.58** time) and reverse (**F14.59** time) to flush field mud and debris from impellers, displaying status code **ClrEr**. The internal control boards feature a three-layer protective lacquer coating, and the cooling duct is entirely isolated from the main logic components, shielding the electronics from fine field dust and high humidity. We highly recommend configuring the software Dormancy settings to prevent pump chattering during very low early dawn light levels.