As New Jersey endures another dangerous heatwave, a look at state energy data raises a question: could the electric grid handle a future where nearly everything runs on electricity?
Trenton, NJ – As temperatures climb toward 100 degrees and electricity demand surges across the region, New Jersey’s power grid is once again under pressure. While PJM Interconnection, the regional grid operator, has maintained reliability through the current heatwave, the extreme weather offers a glimpse into a larger question: what if former Gov. Phil Murphy’s vision of a largely electrified New Jersey had already become reality?
This analysis is hypothetical, but it is grounded in publicly available data from PJM, the U.S. Energy Information Administration (EIA), the New Jersey Department of Environmental Protection (NJDEP), and other state and federal sources. It examines how widespread electrification of transportation, buildings, and appliances could affect electricity demand during one of the year’s most stressful periods for the grid.
Murphy’s vision centered on electrification
Throughout his administration, Murphy made electrification a cornerstone of New Jersey’s climate strategy. His Energy Master Plan called for widespread adoption of electric vehicles, heat pumps, electric appliances, battery storage, expanded solar generation, offshore wind development, and a transition to 100% clean electricity.
The administration argued that transportation, heating, and buildings must shift away from fossil fuels to reduce greenhouse gas emissions. Policies promoted zero-emission vehicle sales, encouraged electrified home heating, and sought major investments in renewable energy.
Although the goals focused on reducing emissions, they also meant transferring more of New Jersey’s daily energy consumption onto the electric grid.
Heatwaves expose peak-demand challenges
PJM entered the summer with approximately 180,200 megawatts of available generation and nearly 7,800 megawatts of demand-response resources while forecasting seasonal peak demand around 156,400 megawatts. The grid operator has also warned that unusually severe weather could push demand significantly higher, narrowing reserve margins.
Air conditioning already represents one of the largest contributors to summer electricity demand. During extreme heat, residential cooling, commercial buildings, hospitals, data centers, and industrial facilities all compete for electricity at the same time.
The analysis suggests that adding millions of electric vehicles into that same evening period could substantially increase peak demand if drivers routinely plugged in after returning home from work. Based on NJDEP traffic data and EPA estimates for EV energy consumption, statewide transportation electrification could represent roughly 80 gigawatt-hours of electricity per day, with unmanaged charging potentially creating an additional evening demand spike of 8 to 12 gigawatts.
Generation may not be the only concern
New Jersey’s electricity system today remains heavily dependent on dispatchable generation. According to EIA data cited in the analysis, roughly 47% of in-state electricity generation comes from natural gas, 44% from nuclear power, and about 8% from solar energy.
Rather than suggesting an immediate statewide power shortage, the analysis argues that local distribution systems and evening peak demand could become the greater challenge if electrification outpaced investments in infrastructure.
Demand-management tools—including time-of-use EV charging, demand-response programs, battery storage, industrial load reductions, and conservation requests—could become increasingly important during prolonged heat emergencies.
The paper also notes that New Jersey Transit has acknowledged that extreme heat already affects transportation infrastructure by causing rail expansion, overhead wire sag, and operational restrictions, illustrating how prolonged high temperatures can stress multiple systems simultaneously.
A debate likely to continue
Supporters of Murphy’s clean-energy agenda have long argued that electrification must be accompanied by expanded generation, transmission upgrades, battery storage, and smarter energy management. Critics contend the state should ensure sufficient dispatchable power and grid capacity before accelerating additional electric demand.
The current heatwave does not answer that debate, but it highlights the engineering and planning challenges that accompany an increasingly electrified economy. Whether New Jersey can ultimately achieve those ambitions may depend less on generating enough electricity over the course of a day than on managing when millions of residents use it.
Key Points
- This analysis examines how a fully electrified New Jersey might perform during a 100-degree heatwave using current grid and transportation data.
- Air conditioning remains the largest summer electrical demand, while widespread evening EV charging could significantly increase peak load if unmanaged.
- Experts generally agree that future electrification would require continued investment in generation, transmission, storage, and demand-management strategies to maintain reliability.
Related: Phil Murphy, New Jersey, PJM Interconnection, Electric Vehicles, Energy Master Plan