I would like to have a solar/battery system with the following specifications.
2x 100W solar panels, probably wired in series, each with the following characteristics:
A battery pack consisting of 15S1P LiFePO4 26650 cells (3300mAh capacity, 1C max charging current), 48V nominal battery pack voltage.
The solar panels would be the system's only power source, so the charger circuit would be thought of as in-situ with load.
For a system with multiple pieces such as this one I suggest contacting your local ADI field office.
I can address the use of LTC3300-1. This part is suitable for the use you describe. We have not used the LTC6812 with the LTC3300-1, but we have used it with the earlier parts, LTC6804 and LTC6811. The LTC6812 should likewise be suitable. You can look at the DC2100B-C demo board (https://www.analog.com/en/design-center/evaluation-hardware-and-software/evaluation-boards-kits/dc2100b-c.html) to see how the LTC6804 and LTC3300 are connected.
The easiest way to manage multiple strings of cells is to connect them in parallel cell-by-cell, then balance the cells that are in parallel with one another as if they are individual cells.
Thanks! I will reach out to local ADI field office as well. For paralleling on cell-by-cell basis, is there any need to manually match the cells since they'll all be treated by the balancer as one cell?
I do not think it should be necessary to match individual cells in any way. Since the cells are in parallel they maintain identical voltages across the cells. In a sense, they are self-balancing.