A solar inverter for a well (variable frequency drive for a borehole pump) converts DC power from photovoltaic panels into AC to drive a submersible pump. This enables autonomous water supply without grid connection or batteries — the pump runs directly from solar energy. The inverter automatically adjusts motor speed based on solar irradiance using a built-in MPPT controller. Among all solar pump inverters, well-specific models feature support for deep submersible pumps and dry-run protection.

How to Choose an Inverter for a Well

Selection depends on well depth, pump power, and supply type (single-phase 220V or three-phase 380V). For domestic wells 30–100 m deep, 1.5–2.2 kW is sufficient; for agricultural irrigation — 5.5–15 kW; for industrial facilities — 37 kW and above. The table below compares the series available in our catalogue.

Series	Supply	Power	MPPT Range	IP	Application
SI30-SS2 (1-ph)	1-ph 220V	0.75–7.5 kW	150–450 VDC	IP20	Domestic well, cottage, small farm
SI30-D5 (3-ph)	3-ph 380V	1.5–11 kW	300–850 VDC	IP65	Medium wells, irrigation, water towers
SI23-T3	3-ph 380V	37–200 kW	350–780 VDC	IP20	Industrial wells, municipal water supply

For most domestic wells, we recommend the Veichi SI30-SS2 1.5 kW — a single-phase model with MPPT from 150V that operates from just 2–3 solar panels. For deep wells with a powerful pump, the SI30-D5 5.5 kW with IP65 protection and a wide 300–850V MPPT range is optimal.

Manufacturers of Inverters for Wells

Our catalogue features a brand with real sales and service support in Ukraine:

Veichi — a Chinese industrial electronics manufacturer with 25 years of experience. Three series for borehole pumps: SI30 (residential 0.75–11 kW, including single-phase SS2 models for 220V), SI21 (mid-range 0.75–30 kW), and SI23 (industrial 37–200 kW). All models feature a built-in MPPT controller, dry-run protection, overload and short-circuit protection.

Inverters for Wells by Specifications

Select an inverter matching your system requirements:

SI30 Series — residential models 0.75–11 kW, single-phase and three-phase
SI23 Series — industrial models 37–200 kW for large facilities
All solar pump inverters — full catalogue with filters

Warranty and Support

All Veichi inverters for wells carry an official 24-month warranty. We assist with selecting the quantity and power of solar panels for your specific well. Delivery across Ukraine: Nova Poshta, direct delivery to Kyiv, Lviv, Odesa, Kharkiv, Dnipro and other cities. Payment: bank transfer for businesses, prepayment or cash on delivery.

Frequently Asked Questions

What is an inverter for a borehole pump and how does it work?

A well inverter is a variable frequency drive that converts DC power from solar panels into AC to drive a submersible pump. The built-in MPPT controller automatically tracks the maximum power point of the panels and adjusts motor speed based on solar irradiance. The pump operates without batteries and without a grid connection.

What inverter power should I choose for a domestic well?

For a domestic well 30–100 m deep with a 0.75–2.2 kW pump, a single-phase Veichi SI30-SS2 inverter of the corresponding power is sufficient. For deeper wells of 100–200 m, a three-phase SI30-D5 rated at 4–7.5 kW is needed. For industrial facilities with pumps from 37 kW — the SI23 series.

How many solar panels are needed for a borehole pump inverter?

The number of panels depends on inverter power: for SI30-SS2 0.75 kW — 2 panels at 500 W, for 1.5 kW — 3-4 panels, for 2.2 kW — 5-6 panels. We recommend a 20-30% power margin for stable operation in cloudy weather. The MPPT range of SS2 models is 150-450 VDC, allowing flexible panel combinations.

Can a well inverter be connected to the grid?

Yes, Veichi SI30 and SI23 series support hybrid mode: priority power from solar panels with automatic switchover to 220V or 380V grid when solar irradiance is insufficient. This ensures uninterrupted water supply year-round.

Which Veichi series suit wells of different depths?

SI30-SS2 (single-phase 220V, 0.75-7.5 kW) — domestic wells up to 100 m. SI30-D5 (three-phase 380V, 1.5-11 kW, IP65) — medium wells up to 200 m with moisture protection. SI23-T3 (three-phase 380V, 37-200 kW) — industrial wells and municipal water supply at depths exceeding 200 m.