What’s Included in a Hill Grwp GRP Substation?

Hill Grwp
Nov 27, 2025
2 min read

A Complete Guide to Our Prefabricated Electrical Substations

Green industrial GRP substation by Hill Grwp with warning signs on doors, set against a cloudy sky. Concrete steps lead up to the entrance.

When choosing a GRP Substation or Switchgear Substation, understanding what is included inside the building is essential. At Hill Grwp, we design and manufacture fully engineered prefabricated substations that arrive on site as complete plug-and-play solutions - reducing installation time, improving safety, and ensuring long-term durability.

Our GRP electrical buildings are built to strict industry standards and customised to each project. Below is a full breakdown of the components that can be included in a Hill Grwp GRP Substation.

1. GRP Substation Building (GRP Kiosk)

The GRP substation enclosure forms the core of every unit. Manufactured from high-strength composite materials, our GRP kiosks are designed for durability, weather resistance, and long service life.

Available options include:

Moulded GRP kiosks
Cladded GRP buildings
Timber-clad kiosks
Gloss, textured, or bespoke finishes
Small, medium, large, or fully bespoke sizes

These GRP enclosures offer secure, insulated, low-maintenance protection for electrical switchgear, transformers, and critical control equipment.

2. Heavy-Duty Steel Base (Hot-Dip Galvanised or C5 Painted)

Each substation can be mounted on a precision-fabricated steel base, engineered for strength and long-term structural integrity.

C5 painted steel base for the HiIl Grwp Substation building

Key features:

Hot-dip galvanised or C5 paint for enhanced corrosion resistance
Designed for site-specific loading and weight distribution
Optional cable entry cut-outs and trench alignment
Lifting points for safe transport and installation
Engineered for harsh industrial, coastal, or remote environments

The steel base provides a stable foundation for the entire substation and ensures effortless installation.

3. Steel Access Platforms & Safe Access Systems

For elevated access or multi-door substation layouts, Hill Grwp designs and fabricates steel access platforms to ensure full compliance and safety.

Green industrial GRP substation by Hill Grwp with warning signs on doors, set against a cloudy sky. The substation has steel staircase for the access

Platform features:

Galvanised or C5 painted steel construction
GRP anti-slip treads for safe access in all weather
Safety handrails and guardrails
Custom-built dimensions to match the substation design

Our platforms are designed for long-term durability, low maintenance, and safe entry for operators and maintenance engineers.

4. Integrated Electrical Equipment (Factory-Fitted)

Inside each GRP Substation, Hill Grwp can supply a complete electrical installation tailored to the project specification.

This can include:

Internal power circuits
LED lighting systems
Heaters and frost protection
Electrical containment (cable trays, ladders, conduit)
Control wiring and distribution circuits
Switchgear/transformer cable routing
Fully tested wiring for plug-and-play commissioning

Our in-house electrical engineering team ensures compliance with all relevant standards, providing a turnkey and hassle-free installation.

5. Air Conditioning & Climate Control Systems

Electrical equipment performs best in controlled environments. That’s why our GRP substations can include high-efficiency cooling and climate management.