end, SCE’s energy storage portfolio totaled more than 5,000 megawatts, one of the largest in the nation. Our team continues to forge coalitions nationally and internationally to address climate change and we are proud to lead the way on these initiatives and partnerships and to support our stakeholders. A future powered by clean electricity is upon us. We stand ready to make this future a reality — reliably, affordably, and sustainably.
Maria Rigatti, Executive Vice President and Chief Financial Officer, Edison International
In my comments today, I will discuss second quarter results, our 2023 EPS guidance, and provide some additional insight into our long-term core EPS growth expectations.
Starting with the second quarter of 2023, EIX reported core EPS of $1.01. As you can see from the year-over-year quarterly variance analysis shown on page 10, SCE’s second quarter earnings saw a 13-cent increase. Among the major items, GRC attrition year revenue escalation added 19 cents year over year. Additionally, higher FERC and other revenue added 4 cents and there was a 10-cent increase related to balancing account interest income. Partially offsetting this growth was an increase in interest expense of 16 cents, driven by higher interest rates associated with funding wildfire claims payments. At EIX Parent and Other, there was a negative variance of 6 cents primarily due to higher holding company interest expense. Overall, we are pleased with our performance through the first half of the year and are confident in delivering on our full-year core EPS guidance of $4.55 to $4.85, laid out on page 11, which we are reaffirming today.
I will now discuss SCE’s capital expenditure forecast, shown on page 12. Following SCE’s 2025 GRC filing in May, we introduced our 2023 through 2028 capital plan of $38 to $43 billion, underpinned by spending covered by SCE’s 2021 and 2025 general rate cases. During the 2025 GRC cycle, which extends through 2028, we project annual capital deployment to be in the $8 billion range, which is double the level from only six years ago. Over 85% of SCE’s investments are in its distribution grid. These are essential to meeting reliability, resiliency, and readiness objectives that support the widespread electrification and decarbonization needed to meet California’s greenhouse gas reduction goals.