Sunrun PPA & Lease Buyout Calculator — How the Formula Actually Works (2026)

You want out of your Sunrun lease or PPA. You called customer service and asked for a buyout quote. They sent you a number. You looked at it and said something along the lines of "how is this possible?"

The number is almost always tens of thousands higher than what the physical equipment on your roof is actually worth. A 10-year-old system that would sell for $8,000 used becomes a $35,000 buyout quote. That is not an accident. It is the result of a specific mathematical formula designed to price exits above the realistic cost of walking away.

Stick with me. I'll show you exactly how the Sunrun buyout formula works, the three components that make it so expensive, the math that happens year-by-year as you consider an exit, and — toward the bottom — the two outcomes we typically get for Sunrun customers who want out without paying tens of thousands. Because here is the secret: the buyout is almost never the best exit option.

What a Sunrun Buyout Actually Is

A Sunrun lease or PPA is a 20 or 25-year contract where Sunrun owns the panels on your roof and you pay them monthly. A "buyout" is an option in your contract that lets you purchase the system from Sunrun early — at a price Sunrun calculates.

There are generally two triggers for wanting a buyout:

1. You want to sell your home and cannot or do not want to transfer the lease to the buyer
2. You want to stop paying Sunrun and own the equipment outright

Either way, the buyout price quoted by Sunrun is the key variable. And the quoted price is where the math gets interesting.

The Three Components of the Sunrun Buyout Formula

Component #1: Present Value of Remaining Payments

This is the biggest chunk. Sunrun calculates the total of your remaining monthly payments across the life of the contract — with the 2.9% annual escalator applied — and discounts them to present value using an interest rate Sunrun chooses.

Here is why this is problematic:

• Your remaining payments are already inflated by the escalator. Year 10's payment is already $194, not $150.
• The "present value" discount rate Sunrun uses is typically lower than market rates, which inflates the present value rather than deflating it.
• This component alone often accounts for 80-90% of the buyout quote.

Component #2: "Fair Market Value" of the Equipment

Some contracts require Sunrun to quote fair market value as the buyout. In theory, this should approximate the resale value of used equipment. In practice, Sunrun's FMV calculations consistently come in at 2-4x realistic market rates.

A 10-year-old panel array has a real market value of maybe $4,000-$8,000. Sunrun's FMV calculation for the same array often runs $20,000-$30,000. The difference is built into the formula methodology that heavily weights replacement cost over resale value.

Component #3: Administrative and Transaction Fees

Buyouts trigger various administrative fees — "termination fees," "processing fees," "title transfer fees." These can add $500-$3,000 to the quoted buyout.

The Sunrun Buyout Math by Year (Real Example)

Based on patterns in case files we review, here is what a typical Sunrun buyout looks like across the life of a $150/month lease starting in 2020:

• Year 3 (2023): ~$48,000 buyout
• Year 5 (2025): ~$42,000 buyout
• Year 10 (2030): ~$33,000 buyout
• Year 15 (2035): ~$24,000 buyout
• Year 20 (2040): ~$14,000 buyout

For context: the underlying equipment — a ~7kW residential solar system — has a new retail cost of roughly $18,000-$22,000 (with installation). Used market value at 10 years runs $6,000-$10,000.

In other words: Sunrun's year-10 buyout is roughly 4x the realistic resale value of the equipment you would be "buying."

Why the Buyout Is Almost Never the Right Exit

Here is the key insight most homeowners miss: the buyout is designed to be unfavorable. Sunrun's business model is 25-year revenue streams. Their capital markets are structured around locked-in cash flows. Every buyout represents revenue they do not want to lose — so they price buyouts to discourage exits.

Meanwhile, there are four exit paths that often do not require any payment at all:

Path #1: Legal Cancellation via Misrepresentation

If the sales rep promised zero bills, misrepresented the tax credit, lied about system performance, or rushed you through a tablet, you likely have a misrepresentation claim under state consumer protection law. Texas DTPA, California CLRA, NY GBL §349, and equivalent statutes produce contract cancellation as a remedy — often with equipment retention and no further payment. (Full cancellation guide.)

Path #2: Forged or Irregular Signatures

The NY AG's $275M Attyx lawsuit specifically cites forged e-signatures. Sunrun uses similar tablet-based workflows. If your contract shows signature irregularities, the contract may be void from the start — zero buyout required. (Forged signature guide.)

Path #3: Cooling-Off Period Still Open

Federal and state cooling-off rules give door-to-door sales customers 3 business days to cancel — but the clock only starts if the notice was given properly. Improper notice means the window may still be open years later. (Cooling-off period.)

Path #4: AG Investigation Leverage

The Texas AG's April 6, 2026 investigation into Sunrun means Sunrun's legal team is currently resource-constrained and more willing to settle individual cases. The 90-day window after a major AG action is historically when the best individual outcomes get negotiated. (Texas AG breakdown.)

What Sunrun Will Not Tell You About the Buyout

1. The buyout quote is not final. Sunrun often negotiates down if pressure is applied correctly — but the negotiation happens through legal channels, not customer service. Customer service is trained to hold the line.

2. Paying the buyout is not always clean. After paying, customers have reported delays in title transfer, continued UCC lien filings, and additional "decommissioning" fees that were not disclosed.

3. You may not actually need to buy out to sell your house. Many buyers will accept lease transfers. Many title companies will approve clear title with the lease recorded as a disclosed encumbrance. The "you must buy out to sell" pressure is often tactical rather than legally required.

4. The buyout does not undo bad faith. If Sunrun misrepresented the contract at signing, paying the buyout may resolve the contract obligation but does not recover the damages from the misrepresentation. You may be entitled to restitution beyond the buyout amount.

The Realistic Sunrun Exit Decision Tree

If you are considering a Sunrun buyout, walk through this decision tree before paying anything:

1. Was the sales pitch misrepresented in any way? If yes, pursue cancellation before buyout.
2. Does the contract show any signature irregularities? If yes, pursue contract void before buyout.
3. Did Sunrun properly disclose the 3-day cooling-off period? If unclear, check the notice.
4. Are you in a state with active AG enforcement (TX, NY, CT, CA)? If yes, leverage the regulatory environment.
5. Is the buyout quote at least 2x the realistic resale value of the equipment? Almost always yes — which means paying it is likely not the best economic option.

If any of #1-4 apply, a free case review is worth 20 minutes before you pay Sunrun anything.

Here Is What Actually Happens When We Take Your Case

We are not a referral mill. We review every case before we take it. If you meet the criteria — and most homeowners reading an article like this one do — here is what typically happens:

Outcome #1: Your contract gets completely canceled. You keep the system.

Read that again. That $30,000 loan, that $80,000 loan, that $150,000 loan — gone. Wiped. And the equipment on your roof? You keep it. It is yours. Hire a local electrician or solar tech to clean it up and tie it in properly, and you have got a functioning solar system for the cost of a service call.

Not a typo. That is the best-case outcome, and it is what we push for on every case we accept.

Outcome #2: Your loan gets massively reduced. Typically 40% to 60%.

Every case is different, but the pattern is consistent:

• A $150,000 loan knocked down to around $75,000
• A $70,000 loan cut to $35,000
• A $175,000 loan restructured to something you can actually live with

If we cannot completely kill the contract, we fight like hell to get the principal slashed — and we have a track record of doing it.

If we take your case and cannot deliver either outcome?

You get 40% of your fee back after we have exhausted every angle. That is our guarantee, in writing. Nobody else in this space puts that on paper. We do — because we only take cases we believe in.

The Bottom Line

The Sunrun buyout formula is not a fair market price for the equipment on your roof. It is a pricing structure designed to discourage exits and protect Sunrun's long-term revenue projections. When you pay a buyout, you are paying for Sunrun's business model, not the value of the equipment.

The good news: you probably do not need to pay it. Legal cancellation paths — misrepresentation, forgery, cooling-off, AG leverage — regularly produce outcomes where homeowners exit their Sunrun contracts without paying a buyout and with the equipment staying on their roof.

Before you accept or pay a Sunrun buyout quote, get a free case review. The cost is zero. The potential savings is the full buyout amount — often $25,000-$40,000 or more.

Related Reading

• Is the Sunrun Solar Lease Predatory?
• How to Cancel a Sunrun Contract After Installation
• Texas AG Investigates Sunrun
• Solar Contract Forged Signature
• The Escalator Clause Explained
• Trapped in a Solar Lease When Selling Your House
• Solar Salesman Promised a Zero Electric Bill — Now What?
• Buyer Won't Assume Solar Lease — What to Do
• How to Cancel a Sunrun Contract (General)