He has a team that will be with him providing supplies as needed. So would guess he will have generators, toilet, cooking heat source,elsewhere when not using those will stay in his ball.
I didn't get that from the articles. I read the following:
This is a precarious idea. Bellini will be completely isolated, and his adopted dwelling is liable to roll or fall apart at any moment, thrusting him into the icy sea or crushing him under hundreds of tons of ice.
The article may, of course, be incorrect, but from what I have read it appears he will be alone. If he is not alone, and he has a support team, How would the support team keep safe in the event that the iceberg they are all on collapses or tips over? I ask because the article talks about how he has to spend practically all of his time in the ball because the iceberg could tip over at any moment.
Bellini will spend almost all of his time in the capsule with the hatch closed, which will pose major challenges. He’ll have to stay active without venturing out onto a slippery, unstable iceberg. If it flips, he’ll have no time to react.
I would buy that Bellini or he and his team plan to live on an iceberg as it melts and collapses and their plan to survive during the actual collapse is to take refuge in survival balls, but I have a hard time believing what the article implies to me -- that he would live for a year within and be sustained solely by a survival ball.