First, solo mining and pool concepts are incompatible.
Second, the number of shares you are looking at pool or miner? On the pool every hour there will be a different value even using one miner. And the average error is also not worth forgetting.
Appreciate the second look.
By solo mining, I mean not dual mining. NOT mining on my own full node.
The number of shares accepted is from the pool, averaging over at least 48 hours and also looking at 95% (remove top 2.5% and bottom 2.5% of values and calculate average)