On 5/26/20 8:37 AM, Robert Bruninga via EV wrote:
Watch the digits! Yes even in Smart meters, the Disk WILL go backwards, but the count will always go up. Even in Mechanical meters for the last 30 years, there is differential gear that will only push the count up no matter which way the disk goes.
value of energy flow. Just as Robert contends. The neighbor adopted the strategy of trying to never over produce; that is use all PV energy onsite rather than feeding the grid. With my first meter, I found that to be not true and never tried to restrain my over production. I could watch the wheel come to a stop and then rotate the other direction as my PV power increased. I never had the patience to try to read the rotating digits. I first came to the attention of my utility when I started having a day or more of excess production and my meter readings declined from day to day rather than increased. THEN, they put in a two way meter that had accumulators for power both directions.
As I stated, my meter WAS running backward. My electric charges were reduced due to my production.
After you pointed out that only "new" meters failed to run backward I realized the age of my meter. Likely from the 1950s or 1960s.
I'm currently mentoring a neighbor on PV installation. I will advise to avoid allowing production to exceed demand until he gets a two way meter.
I recently discovered that I am my utility's ONLY customer with persistently negative bills. I'm astonished that, out of many thousands of customers, no one else is pursuing PV production for income.
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