Ofgem has launched an investigation into SSE’s prepayment meter (PPM) processes.

The investigation follows concerns about SSE’s approach to switching its customers onto PPM tariffs, particularly those in potentially vulnerable situations.

Ofgem said the investigation will examine whether SSE breached Ofgem’s Standards of Conduct, which are aimed at ensuring suppliers treat customers fairly. It will examine whether the supplier provided appropriate information, and ensured consumers’ ability to pay, when suggesting alternative payment methods.