Under the typical net metering arrangement, the amount you are charged for the energy you consume is equal to the amount you are credited when your system feeds back to the grid. Under the Off-Peak Plan, the amount you are charged and/or credited will correspond with the cost associated with that season, day and time. So, if your system is generating at 1pm, you’ll be credited off peak hour rates as opposed to being on our basic residential rate where you’d receive ~12 cents.
The credits you receive (when your system is sending electricity back to the grid) can only be applied to the tier in which they are accrued. So, if you build credits during the on peak hours, they can only be applied to future on peak hours.