University Renewable Claim Under Hourly Matching
A university consumes 60,000 MWh and markets itself as 100% renewable. It currently retires unbundled RECs equal to 100% of load at $1.50/MWh, although only 8,000 MWh comes from campus solar. A new state disclosure rule will require hourly matching of clean energy by 2028 for the 'carbon-free' claim. Campus load includes 20,000 MWh in winter evenings and 25,000 MWh in summer afternoons. A 15-year solar PPA could supply 22,000 MWh at $46/MWh; a battery can shift 5,000 MWh at a levelized cost of $85/MWh; additional RECs remain available but may not satisfy hourly rules. The board wants to keep the sustainability claim and limit cost increases to 8% over the current $3.6 million supply budget.
1. Assess whether the current REC strategy supports the claim under market-based and hourly rules, and quantify the cost of the current REC program.
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Current REC cost = 60,000 × $1.50 = $90,000 per year, only 2.5% of the $3.6 million supply budget. Under market-based accounting, annual unbundled RECs equal to 100% of load can support a '100% renewable' claim if they are from eligible sources and retired. Under the new hourly rule, annual RECs are insufficient: clean generation must match load in the same hour. Campus solar contributes only 8,000 MWh, and the winter-evening and summer-afternoon load profile does not align with solar output. A 22,000 MWh solar PPA would still be mostly midday and would not cover 20,000 MWh of winter evening load. The claim is therefore at risk by 2028 even though the REC program is cheap. The university should distinguish location-based, market-based, and hourly claims in its disclosure.
2. Design a least-cost portfolio to reach at least 80% hourly clean energy by 2028 within the 8% budget cap. If infeasible, show the gap and recommend a defensible target.
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80% of 60,000 MWh is 48,000 MWh. Campus solar 8,000 plus the PPA 22,000 = 30,000 MWh, or 50%. Battery shifting 5,000 MWh can move solar to evening but does not create new clean MWh unless it charges from otherwise curtailed output; net clean volume remains about 30,000 MWh. To reach 48,000, the university needs roughly 18,000 additional firm clean MWh. At an assumed $70/MWh, that costs $1.26 million. Current budget is $3.6 million; the 8% cap is $3.888 million. The PPA replaces 22,000 MWh at an assumed $60/MWh, saving about $308,000; the battery adds $425,000; net increase about $117,000. Adding 18,000 MWh at $70 million? The arithmetic gives about $4.977 million, 38% over budget. The 80% hourly target is not feasible within 8%. A defensible path is 50% hourly clean, battery shifting, and annual RECs for the residual with clear disclosure, or the board must raise the budget.
3. What regulatory, financial, and reputational risks arise, and which PPA terms protect the claim?
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Regulatory risk includes the hourly verification rule, eligible-source definitions, additionality, and audit requirements. Financial risk includes REC price volatility, the fixed $46/MWh PPA versus market prices, volume risk if load falls, and battery cost overruns. Reputational risk is greenwashing litigation or media criticism if the '100% renewable' claim relies on annual RECs after the rule changes. PPA terms should confirm ownership and retirement of RECs, hourly production tracking and data rights, substitute generation if the plant underperforms, change-in-law relief, curtailment and negative-price treatment, credit support, and termination rights. The university should avoid double counting campus solar and PPA RECs, disclose the percentage of load matched hourly, and phase the claim as the portfolio changes.