Welcome to your online account Existing online customer Enter your registered email address and password to log in. Email address: Password: Forgotten your password? Click here to be sent a reminder. New online customer registration Please enter your individual PIN to register: PIN: Opus Energy customers are allotted a unique PIN to ensure that energy accounts are only accessed by authorised persons. Your PIN can be found on your welcome letter or your monthly invoices. If you do not have this information to hand contact Customer Services who will be able to tell you your PIN. Alternatively you can register using information from your latest invoice.