Financial research concept

Residential Solar Customer Count

measures the cumulative deployed customer base across subscription and purchased residential solar or storage systems.

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.

Customers combine two different economic relationships
Current-period additions are a flow into the installed base
Installed base is not active recurring revenue
Part of the Residential Solar & Storage Subscription Economics
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Residential solar customer count measures Sunrun's cumulative deployed customer base across subscription and purchased residential energy systems.

Sunrun reported 1,165,686 Customers at December 31, 2025.

Customers combine two different economic relationships

Sunrun defines Customers as Subscribers plus Purchase Customers for systems recognized as Deployments.

A Customer therefore is not automatically a recurring subscription relationship.

Current-period additions are a flow into the installed base

Sunrun added approximately 117,000 Customers during 2025.

That annual flow was roughly 10% of the year-end customer stock, but the ratio should not be interpreted as exact net growth because the definitions and timing of the stock and flow differ.

Installed base is not active recurring revenue

Customer count does not equal active subscriptions, recognized revenue-generating contracts only, or unique households under every peer definition.

Use Subscription Mix to separate subscription economics from purchased systems.

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 AdditionsCustomer CountCurrent conceptSolar 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 Additions Solar Capacity Installed Storage Capacity Installed Subscriber Additions Subscription Mix

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Compare public companies

Compare cumulative deployed customers with annual additions and subscription mix rather than treating all customers as subscribers.

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