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Introduction
To properly sell an ADU, so that installation is quickly processed by ESP Operations, please decide which of the following scenarios best fits your sales situation.
ADU: Solar On ADU
Solar installed on an ADU is optimal to offset the energy usage of an ADU that has its own utility
service. To ensure an optimal installation experience, please ensure the ADU meets the
following criteria:
● ADU has a valid permit and plans/blueprints
● ADU has a Title 24 Report (Building Efficiency Standards Report)
● ADU has (or will have) its own utility service/meter
If the ADU meets these criteria, please complete the following steps to ensure an expeditious
installation experience. If you are selling solar on the ADU, or the ADU and the main house at
the same time, there are three options depending on whether the ADU has a separate address.
SALES STEPS: ADU ONLY
If you are selling solar on the ADU only and no solar on the main house, follow these steps:
1. Execute an HIA and financing documents for the ADU address only.
2. Provide the following documentation to ESP when scheduling a site survey.
• Copy of ADU permit (including permit #) and plans/blueprints for
• Copy of ADU Title 24 Report (Building Efficiency Standards Report)
SALES STEPS: ADU & MAIN HOUSE - DIFFERENT ADDRESS
If the ADU has a separate address, please complete the following:
1. Execute an HIA and financing document for the main house address only. ESP will process
this as a separate job from the ADU.
ADUs, NEW BUILDS, & MANUFACTURED HOMES
2. Then, execute an HIA and financing documents for the ADU address only. ESP will process
this as a separate job from the main house.
3. Provide the following documentation to ESP when scheduling a site survey.
• Copy of ADU permit (including permit #) and plans/blueprints
• Copy of ADU Title 24 Report (Building Efficiency Standards Report)
SALES STEPS: ADU & MAIN HOUSE - SAME ADDRESS
If the ADU does not have a separate address, please complete the following:
1. Execute an HIA, but no financing, for the main house system only. ESP will process this as a
separate job.
2. Execute an HIA, but no financing, for the ADU system only. ESP will process this as a
separate job.
3. Execute an HIA and financing for the total system using the main house address. ESP will
use this HIA to achieve NTP from the financier.
4. Provide the following documentation to ESP when scheduling a site survey.
• Copy of ADU permit (including permit #) and plans/blueprints
• Copy of ADU Title 24 Report (Building Efficiency Standards Report)
ADU: Solar On Main House
Solar installed on the main house in order to offset energy usage for an ADU is optimal when an
ADU does not have its own utility service or if you’re unsure. To ensure an optimal installation
experience, please ensure the ADU meets the following criteria:
• ADU has a valid permit and plans/blueprints
• ADU has a Title 24 Report (Building Efficiency Standards Report)
If the ADU meets these criteria, please complete the following steps to ensure an expeditious
installation experience.
SALES STEPS
1. Execute an HIA and financing documents for the main house address only.
2. Provide the following documentation to ESP when scheduling a site survey.
• Copy of ADU permit (including permit #)
• Copy of ADU Title 24 Report (Building Efficiency Standards Report)
ADU FAQ’S
Q: What if I don’t know if solar should go on the ADU or not?
A: If you’re unsure whether to sell solar on an ADU or on the main house, default to selling solar
on the main house. Energy generated from the solar system can be used to offset ADU energy
usage with all but the few utility companies that don’t allow meter aggregation and a new utility
service is required to be installed on the ADU.
Q: What if the ADU isn’t built yet?
A: ESP will still accept a contract to install solar on an ADU or main house if an ADU is not yet
constructed. Please provide a copy of the ADU permit, blueprints, and Title 24 Report so ESP
knows what structure will be built. If you’re selling Solar On ADU, please provide an ETA on the
construction of the ADU so ESP can plan an installation date.
Q: What if I need a solar plan set to get an ADU permit?
A: Building departments in California do not require a full solar plan set in order to issue an ADU
permit. Building departments require a Title 24 Form and minimal solar blueprint requirements to
conform to Title 24’s net-zero guidelines. If you would like assistance with preparing an ADU
Permit to include solar, ESP can connect you with a trusted partner who specializes in ADU +
Solar permits to ensure the structure is legally permitted from the outset.