1. What are the T1 and T3 rates shown on the EV meter? A 1. What are the T1 and T3 rates shown on the EV meter? T1 is the counting register for the off-peak period on the meter, whilst T3 is that of the peak consumption. Lorraine Gravino2021-12-20T16:16:31+01:00 FacebookTwitterRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail