The assessment
How it scores, by category
Market position
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
- 720–725 W
- Electrical layer
- DC module output
- Construction
- Bifacial, Dual-glass
Performance guarantee: 30-year linear output
Wattage figure based on the sourced rated power (725 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 725 W at STC.
How this is modelled
Modelled from this panel’s own published first-year (1%) and annual (0.4%/yr) degradation figures, compounded against its 725 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 | 718 W | 706 W | 692 W | 677 W | 663 W | 648 W |
| % of rated | 99.0% | 97.4% | 95.4% | 93.4% | 91.4% | 89.4% |
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. Intersection of the datasheet (720-745 W) with the Australian approval (710-725 W). The datasheet's 730-745 W bins have no Australian pathway. Scored model: SG-66TG5B-725 · checked 2026-08-19. Evidence.
Sources & references · checked 2026-08-19
Strong evidence coverage
12 of 12 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. Built 2026-08-19 from Sungrow's own SG-66TG5B datasheet, retrieved from info-support.sungrowpower.com via the product page and verified complete: byte count matched the declared Content-Length exactly, with %PDF magic and a trailing %%EOF. Figures read from a render of the Specifications (STC) table; the sheet also carries a separate Specifications (BNPI) table at front 1000 W/m2 and rear 135 W/m2, which runs roughly 10 per cent higher, publishes no efficiency row, and is not used here. Retained scope is the intersection and it is materially narrower than the datasheet. The datasheet covers 720-745 W; the Australian approval covers 710-725 W across 4 models. Only 720 W and 725 W appear in both. The datasheet's headline 745 W at 24.0% is NOT an installable Australian product, and the scored 725 W bin publishes 23.3%.
- Sourced valuesData card →
- Archived copy of the primary sourcePDF ↗
Product record history
Baseline 2026-08-16 · 232 product records
Product record
kind: panel; brand: Sungrow; name: SG-66TG5B; model: SG-66TG5B-720 through SG-66TG5B-725 (132 (6x22) cells, N-type monocrystalline, bifacial double glass); scored model SG-66TG5B-725; score: 57.8
Source
This is review.solar's publication history. It does not claim the product changed on the recorded date, and it excludes compatibility, system pairing, installation suitability and relative leaderboard prose. Open the complete JSON record.
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- AU market evidence checked
- Series benchmark evidence checked
Scored by Solar Analytica Research
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Our reading
SG-66TG5B scores 58, placing 48 of 51 in the Global Tier-1 class against a class average of 67.0. Its strongest scoring dimension is performance & degradation (73), above the class average of 73. Guarantee & Backbone scores 41, the lowest pillar for this product. The class average on guarantee & backbone is 60. Underlying specifications include a module efficiency of 23.3%, N-type monocrystalline cell technology, 15-year product warranty backed by a 30-year performance term.