He also told me that out of garage (The Cabot) while some of the boxes are programmed to allow adding value, others have been disabled.
So I would suggest that we all email the superintendent at Cabot to find out what the policy is going to be.
Superintendent Cabot Bus Garage
275 Dorchester Ave.South Boston, MA 02127
By email: CabotSuperintendent@mbta.com
One thing is clear. If riders all decide to fill their cards on the buses instead of retail locations the boarding times are going to be long. It took me about 30 seconds to load $5 on a card to test the system.
Also everyone should keepin mind that whatever you deposit into the farebox will go on the card, there is no way to get change on a bus.
UPDATE 12/21 "adding value to Charlie Cards if you only ride a bus"
12/20 adding value to Charlie Cards if you only ride a bus