Tax Credit Incentives for Residential Solar Photovoltaic in Hawai‘i

Solar photovoltaic (PV) tax credits are at the center of a public debate in Hawai‘i. The controversy stems largely from unforeseen budgetary impacts, driven in part by the difference between the legislative intent and implementation of the PV tax credits. HRS 235-12.5 allows individual and corporate taxpayers to claim a 35% tax credit against Hawaii state individual or corporate net income tax for eligible renewable energy technology, including PV. The policy imposes a $5,000 cap per system, and excess credit amounts can be carried forward to future tax years. Because the law did not clearly define what constitutes a system or restrict the number of systems per roof, homeowners have claimed tax credits for multiple systems on a single property. In an attempt to address this issue, in November 2012, temporary administrative rules define a PV system as an installation with output capacity of at least 5 kW for a single-family residential property. The new rule does not constrain the total number of systems per roof, but rather defines system size and permits tax credits for no more than one sub-5 kW system. In other words, it is possible to install multiple 5 kW systems and claim credits capped at $5,000 for each system. There is an additional 30% tax credit for PV capital costs at the federal level. There is no cap for the federal tax credit and excess credits can be rolled over to subsequent years.

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