Over the years, EnergyGPS has done extensive analysis on the evolution of batteries within California and Texas and their impact on the grid operations.  We have broken the content down into three buckets known as Essential, Evergreen and Market Topics.  Essential pieces detail the foundational information while Evergreen is just that, timeless in nature and can be worth a re-read now and then. The Market Topics bucket is the most populated as we jump into a market’s balancing construct and discuss the impact the battery fleet is having on the marginal megawatt and why.  There are plenty of examples of such an impact ranging from CAISO’s ancillary service saturation to the lower of the evening ramp price volatility.  Over in ERCOT, we had a situation where the battery fleet was in its infancy while power demand was on the rise and flexibility served its purpose in the Summer of 023, but at a price.  All this is a part of the stand-alone Battery Product we offer along with including it in the eCommerce Platinum Plus package.  Individuals can subscribe to the latter by clicking on the link provided (choose monthly or annual) or email us at sales@energygps.com for more information on multiple licenses for your team/company.  In this article (Gold/Platinum Packages) we wanted to pull on a couple of the insights we have offered as a deep-dive analysis as the battery fleet continues to assess the price signals in the CAISO marketplace and have an impact at the same time.

The figure below is from the CAISO Daily Battery Dashboard (sample) and its intent is to illustrate the daily CAISO battery fleet charge (blue shaded area) and the discharge (orange shaded area).  We overlay both the SP15 (black line) and NP15 (gray line) real-time price settles as this is where the rubber meets the road as the saying goes.

Figure 1 | CAISO Battery Volume/Price Breakdown - Hourly