Financial research concept

Residential Solar Customer Additions

measures the number of newly deployed residential solar or storage customer systems recognized during a period.

By Lee BaileyPublished Sep 26, 2026

Research context

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Research date: Sep 26, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context: 17 connected conceptsPart of the reviewed Residential Solar & Storage Subscription Economics; issuer definitions remain distinct where disclosed.
Company examples: 1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.

Annual additions were about 10% of the ending customer base
Customer Additions include two commercial models
Deployments are not leads or signed contracts
Part of the Residential Solar & Storage Subscription Economics
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Residential solar customer additions measure newly deployed customers recognized during a period across both subscription and purchased systems.

Sunrun added approximately 117,000 Customers during 2025.

Annual additions were about 10% of the ending customer base

Sunrun ended 2025 with 1,165,686 Customers.

Dividing approximately 117,000 additions by the ending customer count gives roughly 10.0%. This is a scale comparison, not a customer-retention calculation.

Customer Additions include two commercial models

Sunrun defines Customers as Subscribers plus Purchase Customers.

That means total Customer Additions cannot be substituted for Subscriber Additions, which exclude Purchase Customers.

Deployments are not leads or signed contracts

Sunrun defines Customer Additions through Deployments.

The measure therefore reflects systems meeting the company's deployment criteria, not prospects, signed agreements awaiting installation, or bookings.

Primary sources: Sunrun 2025 Form 10-K, Sunrun 2026 Proxy Statement, and Sunrun first-quarter 2026 results filing.

Part of the Residential Solar & Storage Subscription Economics

Connects residential solar and storage deployment growth with subscription mix, per-subscriber creation economics, network capacity, and the discounted value of contracted and modeled subscriber cash flows.

Browse the full operating model in Company Analysis →

Where this concept fits

Customer growth, subscription mix, and deployment volumeCurrent relationship
Customer Additions split between subscription customers and system purchasers, while Subscriber Additions feed the long-term Customer Agreement base. Solar and storage capacity measure the physical deployment produced by that customer growth.
Customer AdditionsCurrent conceptCustomer Count Solar Capacity Installed Storage Capacity Installed Subscriber Additions Subscription Mix
Storage adoption and cumulative network scale
Storage Attachment Rate describes the mix of new customers taking batteries, while Networked Solar Capacity captures cumulative deployed solar scale across the installed network.
Networked Solar Capacity Storage Attachment Rate
Subscriber unit economics and earning-asset value
Contracted Subscriber Value and Creation Cost determine near-deployment economics, while Subscriber Value adds modeled upside and Gross Earning Assets extend discounted cash-flow assumptions across the existing subscriber base.
Contracted Gross Earning Assets Contracted Subscriber Value Creation Cost per Subscriber Addition Gross Earning Assets Net Earning Assets Subscriber Value Upfront Net Subscriber Value Upfront Net Subscriber Value Margin Upside Gross Earning Assets

See It in Company Research

These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.

RUNOpen operating-model research →17 of 17 reviewed concepts in Residential Solar & Storage Subscription EconomicsCustomer growth, subscription mix, and deployment volume6 of 6 bridge concepts supportedContinue through this bridge:Customer Count Solar Capacity Installed Storage Capacity Installed Subscriber Additions Subscription Mix

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Compare public companies

Compare annual deployment flow with the ending customer stock while separating Subscribers from Purchase Customers.

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