Depending on the solar system, the home, and the homeowner’s expectations for their system, project installations may include what are termed “adders.” Adders are items and related costs beyond the basic panels, inverters, racking package. Some adders are operational, or necessary, for the solar system to be able to operate, while others are optional features.
Examples of operational adders would be roofs constructed with tile or some non-traditional material, or a particularly steep roof slope. Here, additional costs will need to be accounted for to install the solar system.
Examples of optional adders may include a solar panel upgrade or addition of a battery system.
- Be sure to take note of potential adders from the very beginning of the sales process! Adders that are not identified until after funding has been secured can result in reduced sales commissions, out-of-pocket costs for the homeowner, or the need to revisit funding approval, and ultimately increase the potential of a contract's delay or cancelation.
- The table below represent examples of common adders and ranges in pricing. Adders are market specific, so build in adequate adder pricing into your projects, and definitely consult your sales support representative to ensure adders costing is accurate for your area of focus.
If an adder price is marked with an asterisk (*), the price will automatically be calculated in the app once it is selected. All other adders must be added manually by the salesperson in the app’s ITC adder line on the financing screen. Reference 'Building a Proposal in the App - Part IV, Selecting Financing' for instructions on populating the ITC adder line.
Small size system < 5kW
Adder accounts for fixed cost associated with system installation
Main Panel Upgrade
Potentially necessary in older homes or when home has 100 amp Main Service Panel and solar system is larger than 5 kW
Move Vent Pipe
Non-combustion vents only
Corrugated or standing seam
Flat Tile roof
Cement & walkable tiles without breaking
Hard Spanish Tile
Cement & walkable without breaking
Soft Spanish Tile
Clay, ceramic, breakable
Steep roof > 35°
Steeper than 45º may be disqualified
Flat roof < 5º
Ground Mount, Substructure
Trenching not included
Ground Mount Trenching, Conduit, and Wiring
Linear distance from array to service panel, avoiding obstructions
$150 flat fee plus
$15/ Linear Foot
* When selected, the cost is added automatically in the app.