Rooftop wind turbines as a complement to solar

Rooftop wind turbines about 1.5 metres wide and under 20 kg were presented by The Energy Shift on 10 September 2026 as a complement to building-mounted solar generation, with no manufacturer, model or power curve identified.

The missing variable is the residual value of the equipment. The Distributed Wind Market Report: 2024 Edition, from the Pacific Northwest National Laboratory (PNNL-36057), covering United States data through 2023, records that only seven small wind turbine models held active certification as of June 2024, against at least 23 models certified between 2011 and 2023, because manufacturers stop renewing when they leave the market or cease operations.

Lapsed certification and an absent manufacturer remove the asset's performance benchmark and its access to spare parts. The equipment stays on the roof but leaves the balance sheet at scrap value before the end of its projected service life. Removal cost stays with the owner.

What decides a rooftop wind purchase is whether the manufacturer and the model certification survive the life of the asset.