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Project 07 · Solar PV

Supermarket rooftop, Chippenham

Solar PV · 309kW flat-roof ballasted PV system

Site typeSupermarket
ServiceSolar PV (AC & DC)
LocationChippenham, Wiltshire
System size309kW
Roof / mountingFlat roof, ballasted
InvertersSolis (as pictured)
Our scopeFull AC & DC install, testing & commissioning

A 309kW rooftop solar PV system on the flat roof of a supermarket in Chippenham, Wiltshire. The modules sit on a ballasted mounting system, laid out in long rows across the roof. MTM carried out the full AC and DC installation, plus all AC and DC testing and commissioning. The photographs show the mounting layout and ballast, the roof-level cable tray carrying the DC string cables, the finished module rows, and the inverter and AC isolator wall in the plant area.

Operative walking among the ballasted mounting rails
Operative walking among the ballasted mounting rails
Concrete ballast blocks on the mounting rails
Concrete ballast blocks on the mounting rails
Lidded cable tray on the roof, with a caution label
Lidded cable tray on the roof, with a caution label

PV installation

From the mounting layout, through the roof-level cable tray, to the finished module rows on the flat roof.

1 · Access & layout

Operatives on the scaffold stair tower at the roof edge
Operatives on the scaffold stair tower at the roof edge
Operatives among the mounting rails set out across the roof
Operatives among the mounting rails set out across the roof
Mounting rails weighted with concrete ballast blocks
Mounting rails weighted with concrete ballast blocks

2 · Tray work

DC cables in a cable tray bend on the roof
DC cables in a cable tray bend on the roof
Labelled DC cables in tray, running out from a module row
Labelled DC cables in tray, running out from a module row
Labelled DC cables at a tray junction on the roof
Labelled DC cables at a tray junction on the roof

3 · Panels

Completed module rows across the roof
Completed module rows across the roof
Walkway between two module rows
Walkway between two module rows
Module rows on ballasted frames along the roof
Module rows on ballasted frames along the roof
Close view along the module rows
Close view along the module rows
Angled view across the module rows
Angled view across the module rows
Module rows running towards the roofline
Module rows running towards the roofline
Long module rows across the flat roof
Long module rows across the flat roof

Inverters & AC isolation

The inverter and AC isolator wall in the plant area.

Solis inverters on the inverter wall, with cable tray
Solis inverters on the inverter wall, with cable tray
Two isolators mounted below an inverter
Two isolators mounted below an inverter
Cables terminated with torque marks
Cables terminated with torque marks
Planning a commercial solar project from 100kWp upward?

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