Solar Mosaic Inc. - Mosaic Home Solar Loan - SunShot 9 Final Report

Sep 22, 2026

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SunShot 9 final report details the DOE/EERE Cooperative Agreement award DE-EE0006686 for the Mosaic Home Solar Loan project. It summarizes progress from early crowdfunding to a multi-state residential solar lender serving leading installers. The report highlights milestones: lending outside CA, financing under-700 FICO borrowers, packaging O&M, enabling installer processing via API, and reducing acquisition costs below $1500. It reports average homeowner savings of $30,550 and notes key learnings on ownership preferences and repayment-linked default mitigation.

LanguageEnglish

CategoryPresentations

FormatPDF

Pages18

Reading Time6 min

AccessFree to download

Executive summary

Background history of Mosaic through the award

Project objectives and results

Project results and discussion

Lending to lower FICO borrowers

Lending to homeowners outside of CA

Offering O&M with loans

Integrating with installers via API

Solar Mosaic Inc. Mosaic Home Solar Loan SunShot 9 Final Report Award Number: DE-EE0006686 Principal Investigator: Billy Parish [billy@joinmosaic.com](billy@joinmosaic.com) [203-887-7225](203-887-7225) Submitted By Colin Walsh [colin.walsh@joinmosaic.com](colin.walsh@joinmosaic.com) [858-768-1115](858-768-1115) | Agency to which Report is Submitted: | DOE/EERE Solar Technologies office | | | --- | --- | --- | | Report: | Research Performance Progress Report (1) | | | Award Type: | Cooperative Agreement | | | Award Number: | DE-EE0006686 | | | Prime Recipient: | Solar Mosaic Inc. | | | Prime Recipient Type: | For-Profit | | | Project Title: | Mosaic Home Solar Loan | | | Principal Investigator (PI): | Billy Parish, CEO, [billy@joinmosaic.com](billy@joinmosaic.com) ; 203- 887-7225 | | | DOE Technology Manager (TM): | Dan Conant, [dan.conant@ee.doe.gov](dan.conant@ee.doe.gov) , 802-595- 0338 | | | DOE Technical Project Officer (TPO): | Daniel Stricker, [daniel.stricker@ee.doe.gov](daniel.stricker@ee.doe.gov) , 202- 287-1873 | | | DOE Grants Management Specialist (GMS): | | | | DOE Contracting Officer (CO): | Uriel Trujillo, uriel,[trujillo@ee.doe.gov](trujillo@ee.doe.gov) , 720-356- 1799, Fania Barwick, [fania.barwick@ee.doe.gov](fania.barwick@ee.doe.gov) , 720-356-1546 | | | Prime Recipient DUNS Number: | 78281715 | | | Award Period of Performance (POP): | Start: 9/30/14 | End: 3/31/16 | | Award Budget Period (BP): | Start: 9/30/14 | End: 3/31/16 | | Date of Report: | 2/9/2017 | | | Reporting Period (covered by this report): | 9/30/14 to 3/31/16 | | Executive summary The 6686 Mosaic SunShot award has allowed Solar Mosaic Inc to progress from an early stage startup focused on commercial crowdfunding to a leading multi-state residential solar lender. Our platform is now used by the majority of the nation's top solar installers and offers a variety of simple home solar loans. Mosaic is has originated approximately $1Bil in solar loans to date to put solar on over 35 k rooftops. The DOE’s efforts, combined with our own, are helping to reach homeowners with a wide range of credit scores across multiple states and mitigate boundaries preventing them from profiting from ownership of a home solar system. The project included milestones in 5 main categories: 1. Lending to homeowners outside of CA 2. Lending to homeowners with FICO scores under 700 3. Packaging O&M with the home solar loan 4. Allowing residential installers to process home solar loans via API 5. Lowering customer acquisition costs below $1500 A number of key learnings came out of the project. We found that many US homeowners are drawn to direct ownership through a loan and prefer this option to third party ownership (PPA’sand Leases) . ● Installers can realize substantial growth to their businesses by focusing on selling benefits of ownership (capturing the ITC & home value increases) . ● High demand exists for home solar lending solutions outside of CA. ● Customer savings on their system is an import metric to predict default rates (the homeowner is unlikely to default if they save money with the solar system loan) . ● Some solar installers are receptive to providing O&M along with a home solar loan, though most prefer to charge for this feature and package it with a Performance Guarantee. ● Most large residential installers have customized CRM systems where they process quote requests. Some prefer to submit loans via API and it has proven to be important for us to integrate with their sales processes. ● Most residential installers struggle with rising customer acquisition costs. Installers with refined lead processing practices such as efficient call center operations and automated follow up using marketing automation tools are most likely to close more loans at lower cost. The Mosaic home solar loan platform is now used by over 250 installers across 40 states, who have found that they can offer home

FAQs

What award supported the Mosaic Home Solar Loan project?

The report covers the SunShot award DE-EE0006686 under a Cooperative Agreement submitted to the DOE/EERE Solar Technologies office.

Which main milestones were included in the project?

Milestones included lending outside CA, lending to homeowners with FICO scores under 700, packaging O&M with the loan, enabling installers to process loans via API, and lowering customer acquisition costs below $1500.

How much can homeowners save, according to the report?

Homeowners save $30,550 on average with a Mosaic Home Solar Loan, with savings based on borrower choices and assumptions about energy bills, loan payments, and solar performance over time.

Sep 22, 2026

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