The assessment
How it scores, by category
The data
Solar module
Produces DC electricity at the roof. It contains no system-level power conversion or storage.
- Product role
- None in the module.
- Published range
- 415–420 W
- Electrical layer
- DC module output
- Construction
- Not recorded
Performance guarantee: 25-year linear output
Wattage figure based on the sourced rated power (420 W) applied to the guaranteed floor; modular/format differences aside, this is the same rated-power spec shown above.
Modelled effective output, year by year
Year 1 to year 25. Rated 420 W at STC.
How this is modelled
Modelled from this panel’s own published first-year (2%) and annual (0.45%/yr) degradation figures, compounded against its 420 W rated (STC) output. This is a datasheet-derived estimate, not a field measurement or a warranty guarantee. Actual output also depends on site irradiance, temperature, soiling and system design.
| Year | 1 | 5 | 10 | 15 | 20 | 25 |
|---|---|---|---|---|---|---|
| Watts | 412 W | 404 W | 395 W | 385 W | 376 W | 366 W |
| % of rated | 98.0% | 96.2% | 94.0% | 91.7% | 89.5% | 87.2% |
Verification & sources
Market context
Global evidencechange in the site menu
Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.
Benchmark anchor. The score is anchored to the highest published rating in this exact published US series. Scored model: TSP-420 · checked 2026-08-01. Evidence.
Sources & references · checked 2026-08-05
Strong evidence coverage
18 of 18 scored criteria link directly to a published source.
Values marked estimated, derived, or not found remain visible on the audit sheet and do not carry the same evidential weight as a linked source. Coverage measures direct links, not an independent guarantee that a claim is correct.
Record revision. Tesla TSP-415/TSP-420 datasheet, North American warranty effective 6 November 2025 and certification directory, rechecked 2026-08-01
- Sourced valuesData card →
- Warranty summary25-year product warranty →
Show 2 more
- Financial strength & warranty backingManufacturer ↗
- Fire classification (IEC 61730)Manufacturer ↗
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- US market evidence checked
- AU market evidence checked
- Series benchmark evidence checked
- Plain-language warranty summary checked
Scored by Solar Analytica Research
Further reading from Signals
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.
Our reading
Its strongest scoring dimension is guarantee & backbone (66). Efficiency & Yield (43) is the dimension with the most room to move. Underlying specifications include a module efficiency of 20.5%, 25-year product warranty backed by a 25-year performance term.