Sunrun Preps for $100M IPO Raise, Reveals Revenue and Losses

The operator of the “second-largest fleet of residential solar energy systems” in the U.S. is going public.

Solar financier Sunrun just publicly filed its S-1 IPO registration with the SEC, and, much to the delight of our data-hungry solar analysts, it is chock-full of details on the operator of the "second-largest fleet of residential solar energy systems in the United States."

Here are some vital stats and comparisons to the No.1 financier, SolarCity:

Sunrun's main suppliers are REC Group for solar panels and ABB Group for inverters. Racking hardware comes from the acquired MEC and its racking product, SnapNrack. 

Sunrun's estimated retained value per watt was $2.41 as of of March 31, 2015. SolarCity has a retained value of $2.27 per watt, according to its most recent analyst letter.

Reporting on SolarCity, the Wall Street Journal defines "estimated retained value" as an "estimate of the value of future income from the electricity that customers buy far into the future, net of costs. A discount rate is applied to those cash flows to take into account the risks involved and effect of inflation to calculate a value in today's money." WSJ adds, "That fairly straightforward premise is actually a black box of assumptions."

The VC investors with significant ownership of Sunrun are:

We'll publish more details and analyst viewpoints once we spend a few more hours with the S-1. In the meantime, here are a few tables from the document.