The Veichi SI30 series is a range of solar pump inverters with advanced functionality for professional water supply systems. The power range from 0.75 to 11 kW supports both domestic borehole pumps and industrial water delivery systems. SI30 inverters convert direct current from photovoltaic panels into alternating current to power three-phase and single-phase pumps without mains connection.

SI30 differs from the base SI23 series with an improved MPPT algorithm achieving up to 99.5% tracking efficiency, a colour LCD display, event logging, and a built-in RS-485/Modbus RTU port for SCADA system integration. The series is part of the full solar pump inverter catalogue and is the optimal choice for commercial and agricultural installations.

How to Choose a Veichi SI30 Solar Pump Inverter

Selecting the right SI30 model depends on pump power, supply type (single-phase or three-phase), and the required MPPT voltage range. The series has three sub-series: SI30-SS2 (1ph input/220V, MPPT 150–450 VDC), SI30-D3 (3ph/220V input, MPPT 150–450 VDC), and SI30-D5 (3ph/380V input, MPPT 300–850 VDC). Key selection criteria:

Pump power — the inverter must match or exceed the motor's rated power.
Supply type — single-phase 220V (SS2) or three-phase 220V/380V (D3/D5).
MPPT range — determines solar array configuration (number of panels in series).
Protection rating — IP20 (SS2, for cabinet mounting) or IP65 (D3/D5, for outdoor installation).

Model	Power, kW	Supply	MPPT Range	Current, A	IP
SI30-SS2-1R5G-R	1.5	1ph/220V	150–450 VDC	10	IP20
SI30-D3-2R2G	2.2	3ph/220V	150–450 VDC	10	IP65
SI30-D5-004G	4.0	3ph/380V	300–850 VDC	10	IP65
SI30-SS2-5R5G-R	5.5	1ph/220V	150–450 VDC	42	IP20
SI30-D5-011G	11.0	3ph/380V	300–850 VDC	25	IP65

Manufacturers of SI30 Series Solar Pump Inverters

The SI30 series is manufactured by Veichi — a leading Chinese manufacturer of variable frequency drives and solar inverters for industrial automation. Veichi Electric has specialised in motor control solutions since 1999 and holds CE, ISO 9001, and ISO 14001 certifications. Veichi's pump system products are also available in the entry-level SI23 series.

SI30 Inverters by Specifications

Select a model based on your system's key parameters:

All solar pump inverters — full catalogue of SI23 and SI30 series
Inverters for wells — models optimised for deep borehole pumps
SI23 series — entry-level series for simple domestic water supply systems

Warranty and Support

All Veichi SI30 inverters come with a 24-month official manufacturer warranty. Chastotnik.ua is an authorised distributor of Veichi Electric in Ukraine. We provide technical support for equipment selection, parameter configuration assistance, and after-sales service. Delivery is available across Ukraine via Nova Poshta and other logistics providers. Payment by bank transfer is available for legal entities and sole proprietors.

Frequently Asked Questions

How does the Veichi SI30 series differ from SI23?

SI30 features an improved MPPT algorithm with 99.5% tracking efficiency (SI23 — 99%), a colour LCD display instead of segment type, event logging for diagnostics, and built-in RS-485/Modbus RTU for SCADA system integration. SI30 is optimal for commercial installations requiring monitoring, while SI23 suits simple domestic boreholes.

Which SI30 sub-series should I choose: SS2, D3 or D5?

SI30-SS2 — for single-phase 220V pumps with MPPT 150–450 VDC (IP20, cabinet mounting). SI30-D3 — for three-phase 220V pumps with MPPT 150–450 VDC (IP65, outdoor mounting). SI30-D5 — for three-phase 380V pumps with MPPT 300–850 VDC (IP65, large panel arrays). The choice depends on motor voltage and solar panel configuration.

How many solar panels are needed for an SI30 inverter?

It depends on the sub-series and power rating. For SI30-SS2/D3 (MPPT 150–450 VDC) with 450 W panels (Voc ~41V), 4–10 panels in series are needed. For SI30-D5 (MPPT 300–850 VDC) — 8–20 panels in series. Total array power should exceed inverter power by 20–30% for stable operation.

Can SI30 operate from the mains without solar panels?

No, the SI30 series is designed exclusively for solar panel power (DC input). Input voltage is direct current from photovoltaic modules. For AC mains operation (220/380V AC), use standard variable frequency drives from the Veichi AC10 or AC70 range.

What is the protection rating of SI30 inverters?

The SI30-SS2 sub-series has IP20 protection — requires installation in a protective cabinet or indoor location. SI30-D3 and SI30-D5 sub-series have IP65 — full protection against dust and water jets, suitable for outdoor installation near the borehole without additional enclosure.