While I haven't done my W&B yet on my RV-10, my understanding is that the Airflow Systems AC package shouldn't require moving the battery. The equipment placed in the tail cone is offset by the compressor added to the front of the engine, and the condenser scoop is near the CG. I've talked to several builders with completed RV-10s with the Airflow Systems AC and they still have their battery in the tail cone.
Regards