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Optimal Solar Investment and Operation under Asymmetric Net Metering

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  • Nathan Engelman Lado
  • Ahmed Alahmed
  • Audun Botterud
  • Saurabh Amin

Abstract

We examine the joint investment and operational decisions of a prosumer, a customer who both consumes and generates electricity, under net energy metering (NEM) tariffs. Traditional NEM schemes provide temporally flat compensation at the retail price for net energy exports over a billing period. However, ongoing reforms in several U.S. states are introducing time-varying prices and asymmetric import/export compensation to better align incentives with grid costs. While prior studies treat PV capacity as exogenous and focus primarily on consumption behavior, this work endogenizes PV investment and derives the marginal value of solar capacity for a flexible prosumer under asymmetric NEM tariffs. We characterize optimal investment and show how optimal investment changes with prices and PV costs. Through this analysis, we identify a PV effect: changes in NEM pricing in one period can influence net demand and consumption in generating periods with unchanged prices through adjustments in optimal PV investment. The PV effect weakens the ability of higher import prices to increase prosumer payments, with direct implications for NEM reform. We validate our theoretical results in a case study using simulated household and tariff data derived from historical conditions in Massachusetts.

Suggested Citation

  • Nathan Engelman Lado & Ahmed Alahmed & Audun Botterud & Saurabh Amin, 2026. "Optimal Solar Investment and Operation under Asymmetric Net Metering," Papers 2602.02284, arXiv.org, revised Feb 2026.
    • Handle: RePEc:arx:papers:2602.02284
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    References listed on IDEAS

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    1. Darghouth, Naïm R. & Barbose, Galen & Wiser, Ryan, 2011. "The impact of rate design and net metering on the bill savings from distributed PV for residential customers in California," Energy Policy, Elsevier, vol. 39(9), pages 5243-5253, September.
    2. Ahmed S. Alahmed & Lang Tong, 2021. "On Net Energy Metering X: Optimal Prosumer Decisions, Social Welfare, and Cross-Subsidies," Papers 2109.09977, arXiv.org, revised Jan 2022.
    3. Severin Borenstein, 2017. "Private Net Benefits of Residential Solar PV: The Role of Electricity Tariffs, Tax Incentives, and Rebates," Journal of the Association of Environmental and Resource Economists, University of Chicago Press, vol. 4(S1), pages 85-122.
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