How to accumulate values based on schedules

Hi there.

From my Pi, I receive two Wh accumulators that are always growing except on reset.

How can I add this values to specific 3 different feeds based on 3 schedules?

It may seem easy to do, but I believe that when the time passes and other schedule is active/true, the accumulator will detect the increase and store all the Wh that were spent during the previous schedule cause all the 3 feeds will get the same values, just with different update times…

Any ideas how to do this?

Cheers.