On cost, utility-scale solar is one of the most predictable forms of energy infrastructure there is. Projects typically land within about 1% of budget, better than almost any other generation technology.
But here’s the problem.
Australia’s own regulator inspects rooftop solar every year and finds roughly one in five systems substandard. Among the home battery installations it inspected, more than 60% fell short.
It isn’t just happening here, and it isn’t just residential.
Walmart removed solar from more than 240 US stores after seven rooftop fires.
Amazon temporarily took its entire North American rooftop solar fleet offline following a series of fires and arc-flash incidents while independent inspections were completed. Internal reports identified issues including mismatched or improperly installed connectors, poor cable management and evidence of water intrusion into some inverters. The findings pointed primarily to installation, commissioning and maintenance issues rather than an inherent defect in the equipment.
The hardware is the predictable part. The risk is in how it’s installed.
A good installer isn’t enough. Commercial projects need technical supervision on site, experienced people making decisions when conditions change, and independent QA throughout the installation.
That’s exactly why Bagatelle Energy exists.
For those delivering commercial and utility-scale projects – where have you seen the biggest execution risk: design, procurement, installation, commissioning or handover? I’d be interested to hear.
Next in this series: why installations go wrong.