On Tuesday, December 9, 2014 9:45:04 AM UTC-5, Chris L Peterson wrote:
On Tue, 9 Dec 2014 02:31:12 -0800 (PST), wsnell01 wrote:

If the batteries were really sufficient to accomplish the mission "goals" then why the solar panels?

Because goals are defined to cover a range. There are minimum goals,
and there are extended goals.

So this almost $2 billion dollar project (just barely) accomplished minimum goals.