<div>In “The 100 Percent Clean Energy Act of 2018” the California
legislature set a target of 100\% of California’s
electricity generated from renewable and zero-carbon sources by 2045.</div>


<div>The California Public Utility Commission (CPUC) and other state entities
now have the task of planning to meet that target.</div>


<div>The California Energy Commission (CEC) has sponsored multiple studies
and sought public input on the pathways that they are exploring.</div>


<div>A key result of that planning process is a Reference System Portfolio
(RSP) based on existing and planned electricity generating capabilities,
and modeled grid build out to meet the planned targets by 2045 at the
lowest cost.</div>


<div>Although this RSP has been discussed by the CEC in a public forum, to
our knowledge, it has not been presented to the photovoltaic community.</div>


<div>Here we document the CEC’s current RSP, with emphasis on understanding
their expectations for build out of solar as well as the associated need
for storage and curtailment.</div>