Rates & thresholds
47 rows across 9 tables: material assistance cost ratio thresholds, domestic content adjusted percentages, Section 232, 301 and 201 duties, minimum import prices and the order the duty layers stack in.
Reference
The numbers, with their sources attached
Most of what is written about US solar incentives is undated and uncited, which makes it useless the moment a rule moves. Everything here carries the window it applies in, the date basis that decides which row you land on, and a link to the statute, notice or proclamation it was transcribed from.
These are the same rule tables the determination engine runs on — not a summary written alongside them.
Solar components, explained
Modules, inverters, batteries and storage, racking and trackers, and the balance of system — each with a labelled diagram, a practical example, and the parts the rules ask about.
Permitting and your AHJ
Which permits, code articles, inspections and product documents a project has to clear — and the questions only your building department and utility can answer.
What this does not do
It will not tell you whether a project qualifies. That needs your bill of materials, the manufacturer of every line, and the evidence behind each answer — which is what the platform is for.
Rule tables synced 2026-10-07. Reference only — not tax, legal or customs advice.