The 90% that you pay them.
yup.
this is one big scam encouraged by the city (and con edison).. they arent doing enough to get private homes covered, so they came up with this idea of having investing companies lease large roofs, payment for the panels comes from the investment companies and from the members monthly bill payments, and the power all goes straight to con edison.
if they cared about the consumer, they would offer more programs to get people solar on their own roofs.
and BTW, the "10% credit" they offer is almost completely offset by a new charge ("customer benefit contribution") they stack onto the fees... so the consumer comes out very little ahead