HARRL Delivers Prefabricated Substations for Shangrao Rainbow Solar PV Project in Jiangxi
HARRL supplied and delivered 26 prefabricated substations for the Shangrao Rainbow solar PV plant in Jiangxi, China — a proven prefabricated substation manufacturer for utility-scale solar.
HARRL (Jiangxi Huanlin Group Co., Ltd.) has successfully completed the supply and on-site delivery of prefabricated substations for the photovoltaic power plant of Jiangxi Shangrao Rainbow Photovoltaic Co., Ltd., a solar developer based in Shangrao, Jiangxi Province. The project reinforces HARRL's track record as a reliable prefabricated substation manufacturer for utility-scale renewable energy in China and overseas markets.
Project background
As part of an approximately 100 MWp solar installation, the Shangrao Rainbow project required step-up substations to collect power from the PV array and inverter blocks and raise it to medium voltage for grid connection. Site conditions called for compact, weatherproof equipment that could be installed quickly with minimal civil work — exactly the profile a photovoltaic prefabricated substation is designed to meet.
The customer needed a supplier who could combine the transformer, medium-voltage switchgear, and low-voltage distribution into a single factory-tested unit, shortening the on-site construction window and ensuring consistent quality across every unit.
The HARRL solution: a prefabricated substation engineered for solar
HARRL supplied 26 prefabricated substation units, each integrating a complete electrical package inside a single weatherproof enclosure:
- Step-up transformer: 3150 kVA double-split (2×1575 kVA) design, optimised for pairing with PV inverter blocks.
- Voltage rating: 0.8 / 35 kV for grid-side connection.
- MV switchgear and LV distribution integrated and factory-wired into the same unit.
- Outdoor-rated enclosure: anti-corrosion, weatherproof construction suited to the local climate.
- Compliance: designed and tested to IEC 62271-202 (prefabricated substations) and IEC 60076 (power transformers).
Because each prefabricated electrical substation is fully assembled and tested in the factory before shipment, the customer received plug-and-connect units that dramatically reduced installation time and on-site risk compared with conventional, field-built substations.
On-site delivery and installation
HARRL's engineering team coordinated logistics, positioning, and commissioning support throughout the delivery. Each unit arrived pre-tested and ready for placement, allowing the site crew to energise the substations with minimal field work. The completed installations are now operating as part of the plant's power collection and grid-connection system.
This delivery demonstrates HARRL's end-to-end capability — from design and manufacturing to logistics and on-site support — for prefabricated substation for solar power plant projects of every scale.
Why choose HARRL as your prefabricated substation manufacturer
HARRL designs and manufactures medium- and low-voltage power distribution equipment for solar, wind, industrial, and utility applications. As an experienced package substation supplier, HARRL offers:
- Custom-engineered prefabricated substations for solar farms and renewable-energy plants.
- IEC-compliant manufacturing with full factory testing.
- Reliable export delivery to Southeast Asia, the Middle East, and beyond.
- Single-source supply of transformers, switchgear, and distribution equipment.
Planning a solar or utility project? Contact HARRL today for a quotation on a prefabricated substation engineered for your site.
