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System Advisor Model (SAM)

Residential Solar Lease

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Godwin Ndisengei
Topic Author

13 Nov 2017 14:29 #5861 by Godwin Ndisengei

Residential Solar Lease was created by Godwin Ndisengei

Just installed SAM to hopefully support my financial modeling for a zero-down solar portfolio - tax equity finance with partnership flip... Can SAM model this, can someone kindly assist with most efficient way to go about this in SAM.

Some key details...

- Average Solar PV system size: 6 kWp array grid-tied with 9.6 kWh battery pack cycled 'daily.'
- No net metering service hence, battery storage, batteries replaced every eight (8) years.
- 20-year PPA.
- Only incentive is accelerated depreciation: 100% in year of bringing system into use.
- Portfolio growth: 1,000 systems year 1; 2,000 systems year 2; 3,500 systems year 3; 5,250 systems year 4; 6,563 systems year 5.
- Finance: Tax Equity with Partnership Flip - Yield based.
- Average Grid Tariff: USD 0.10/kWh

Need to compute cashflows, Flip Date, Sponsor Returns, etc.

Would appreciate any help, pointers, etc. to set me on my way.

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pgilman

13 Nov 2017 21:15 #5862 by pgilman

Replied by pgilman on topic Residential Solar Lease

Dear Godwin,

Thank you for the message.

SAM's PPA partnership flip financial models are designed to model a single large, utility-scale system that sells power at a price negotiated through a PPA. All of the power generated by the system is sold at the PPA price (with optional annual escalation and time-of-delivery multipliers). The residential and commercial models are for systems that meet a building or facility's electric load, and are compensated for any excess generation via something like a net metering or feed in tariff agreement.

Your scenario sounds like it is for a portfolio of many small systems with a PPA, although I am not sure how the project is compensated for the power the system generates. You might try using SAM's partnership flip model and modeling the portfolio of systems as a single system. There are two versions of the partnership flip model, one for a project with debt and one without debt.

Best regards,
Paul

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Godwin Ndisengei
Topic Author

11 Dec 2017 10:07 #5863 by Godwin Ndisengei

Replied by Godwin Ndisengei on topic Residential Solar Lease

Dear Paul

Apologies for my late acknowledgement of your kind response on this matter - I was expecting email notification of any responses, but alas...

I appreciate your suggestion and will certainly test it out and compare against my excel computations - I may have to revert with some follow-on questions once I'm deeper into SAM.

Many thanks and best regards

Godwin

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