A Homeowner’s Guide to Solar PPAs and Third Party Ownership (TPO) in 2026

Solar Power Purchase Agreements, often called PPAs, have become the most popular way for homeowners to install solar and batteries without the cost or responsibility of owning the equipment. This guide explains how PPAs work, how they compare to loans and leases, and when a PPA makes the most sense for a homeowner in Sunnyvale, Mountain View, Los Altos, Palo Alto, Santa Clara, Redwood City, San Jose, and surrounding cities.

This page focuses on education only. If you want to explore a PPA for your home, visit our main PPA program page.

What Is a Solar Power Purchase Agreement (PPA)

A solar PPA is a simple agreement where a solar provider installs and owns the solar system, and you pay only for the power it produces. You do not buy the equipment. Instead, you buy the electricity the panels generate at a predictable rate.

How a PPA Works

• Zero upfront cost
• The PPA provider owns and maintains the system
• You pay a fixed or levelized rate per kilowatt hour
• The system is installed, monitored, and maintained for you
• You benefit from lower, more predictable energy costs

PPAs are popular because they remove the biggest obstacles to going solar: upfront cost and long-term equipment responsibility.

What Is Third Party Ownership (TPO)

TPO refers to any solar arrangement where a company owns the equipment instead of the homeowner. Both PPAs and solar leases are forms of TPO.

PPA vs Solar Lease

A PPA charges you for the power produced.
A lease charges a fixed monthly amount regardless of production.

Both reduce upfront cost and eliminate maintenance responsibility, but PPAs offer more flexibility and often lower long-term cost.

Why PPAs Have Become the Preferred Option for Many Homeowners

Today’s solar systems include more components than ever, including batteries. These systems can be expensive to maintain and replace. Homeowners increasingly prefer PPAs because of the protection they offer.

No Equipment Ownership Risk

You avoid the cost of repairs, inverter failures, and battery replacements.

No Upfront Payment

Most PPAs require zero money down.

Predictable Energy Cost

You know what you will pay for power. No surprises from PG&E rate increases.

System Monitoring and Repairs Included

The provider tracks performance and handles service calls.

Battery Replacement Included with the Enfin PPA

This is the single largest homeowner benefit. Batteries often need replacement within ten to twelve years and cost more than fifteen thousand dollars. The Qcells Enfin PPA covers replacements for the full term.

PPA vs Loan vs Lease: What Is the Difference

Below is a simple breakdown so homeowners can compare options.

Solar PPA

• Zero upfront cost
• No equipment responsibility
• Pay only for power generated
• Full monitoring and maintenance included
• Battery replacement included with the Qcells Enfin PPA
• Lower risk and predictable cost

Solar Loan

• Homeowner owns the equipment
• Eligible for incentives when available
• Upfront cost or financed payments
• Homeowner pays for repairs and replacements
• Best for homeowners who want full ownership

Solar Lease

• Fixed monthly payment
• Third party owns the system
• Maintenance included
• Not tied to actual energy production
• Less flexible than a PPA

When a PPA Makes the Most Sense

PPAs are ideal for homeowners who:

• Want solar with no upfront investment
• Prefer predictable monthly costs
• Want battery replacement protection
• Plan to stay in their home for several years
• Do not want the responsibility of owning equipment
• Are upgrading a roof and considering solar at the same time
• Want protection from rising PG&E costs

When a Solar Loan or Cash Purchase May Be Better

A loan or cash purchase is ideal if:

• You prefer full system ownership
• You want access to incentives while they remain available
• You plan to live in the home for a very long time
• You are comfortable managing repairs and replacements
• You may add system expansions or upgrades later

Common Misconceptions About PPAs

“PPAs are more expensive.”

Not usually. Once you factor in battery replacement and long-term maintenance, PPAs often cost less over time.

“I lose control of my roof.”

You maintain full control. You simply allow the provider access for repairs and monitoring.

“PPAs are hard to transfer when selling a home.”

Modern PPAs, including the Enfin program, are straightforward to transfer.

“I cannot add battery storage with a PPA.”

The Enfin PPA includes battery storage and replacement.

How Battery Storage Fits Into PPAs

Battery storage used to be a major cost barrier. Under the Qcells Enfin PPA, the battery is included and replaced as needed. This makes PPAs one of the simplest ways to add backup power for outages in Sunnyvale, Mountain View, Palo Alto, Los Altos, Santa Clara, and surrounding cities.

If you were to own the battery, replacement alone can exceed fifteen thousand dollars. This responsibility is fully covered in the PPA.

The Qcells Enfin PPA Advantage

The Qcells Enfin PPA is one of the strongest offerings available because it combines:

• Zero upfront cost
• Predictable long-term energy rate
• Full equipment ownership by Axia
• Battery replacement for the entire term
• Monitoring, maintenance, and performance guarantees
• Backing from a global solar manufacturer with a strong track record

For many homeowners, this creates peace of mind that traditional ownership cannot match.

Want to Compare PPA Options for Your Home

You can explore how a PPA compares to your current electric bill by visiting our main PPA program page or speaking with Home Pro directly.

• Visit the full program overview here.

• Learn about all financing choices here.

Call (800) 650-3134 or use our contact form for a custom evaluation.