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What's the Difference Between a Solar Lease and a Solar PPA (Power Purchase Agreement)?
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A solar lease and a solar PPA are similar in the sense that both are strategies that real estate owners may use to get solar on their roofs for no money down. In the case of a solar PPA you are entering into a long-term energy purchase contract with a solar developer or solar contractor... A PPA contract may have a term of 20 years. Each month you will pay an amount for the renewable energy that the solar system generates... That's it. It SHOULD BE less expensive than what you would buy from your utility.
In the case of the solar lease, you will also not have to come out of pocket to buy the solar system. However, you are not entering into an energy purchase agreement, you are entering into an equipment lease, almost like leasing a car. You get to use the equipment for a period of time, usually 10, 15 or 20 years. During that period you will pay a flat fee each month to use the equipment to generate energy for your building. The flat fee should not change, except for perhaps some annual escalation in the cost of the lease, perhaps pegged to inflation, or 3%.
In most cases, if you can afford to purchase the solar system outright, you may want to evaluate this as an option. The reason that a solar purchase is preferable to a PPA or a solar lease is that you will own the solar system and can get the tax benefits of the solar investment tax credit (ITC), as well as any accelerated depreciation, SRECs, ZRECs or other incentives that may be available in your state or town. The payback with a purchase or financing of a solar system should be much quicker, typically 5-10 years, vs. 20 years or never with a solar PPA or solar lease.
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