Embattled Mercury Energy now faces a new revolt - this time from the elderly - just as it apologises to 18,000 customers for threatening to move them on to pre-paid meters.
General manager James Munro, who is also retail general manager for parent company Mighty River Power, drew a storm of protest last week from long-time Mercury customers who received the threatening letter after missing the prompt-payment discount date for one power bill.
Now he also faces a Grey Power petition protesting against charges for paying power bills by cheque, credit card or over the counter.
The letter told customers who were late with one bill in the past month that unless they paid their bill within seven days, Mercury would "exercise our right to move you to our Glo-Bug pre-paid service 30 days after the date of this letter subject to Glo-Bug being available in your area".
It was sent to customers all over the country even though the Glo-Bug system is available only in Auckland.