--- title: "HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X-555W - Solar Panel Comparison | ComparePV" description: "Compare HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X-555W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/ht-saae-ht72-18x-555w/ht-saae-ht72-18x-555w-1" updated: 2026-09-11 --- # HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X-555W Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [HT-SAAE HT72-18X 555W](https://comparepv.com/panel/ht-saae-ht72-18x-555w) | [HT-SAAE HT72-18X-555W](https://comparepv.com/panel/ht-saae-ht72-18x-555w-1) | | Manufacturer | HT-SAAE | HT-SAAE | | Power | 555 Wp | 555 Wp | | Efficiency | 21.50 % | 21.50 % | | Technology | PERC | PERC | ## Every compared parameter | Parameter | 18X 555W | 18X-555W | | --- | --- | --- | | Rated power | 555 Wp | 555 Wp | | Module efficiency | 21.50 % | 21.50 % | | Power density | 214.8 Wp/m² | 214.8 Wp/m² | | Open-circuit voltage | 49.95 V | 49.95 V | | Voltage at max power | 42.10 V | 42.10 V | | Short-circuit current | 14.07 A | 14.07 A | | Current at max power | 13.20 A | 13.20 A | | Temperature coefficient | -0.330 %/°C | -0.330 %/°C | | Dimensions | 2279x1134x35 mm | 2279x1134x35 mm | | Module area | 2.584 m² | 2.584 m² | | Weight | 28.5 kg | 28.5 kg | | Weight per kWp | 51.4 kg/kWp | 51.4 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 25 yrs | 25 yrs | | Annual degradation | - | 0.60 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | No | No | ## Thirty-year yield Declared first-year losses, with 0.40% a year afterwards assumed for both panels, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.330 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 18X 555W:** 18,322 kWh - **Cumulative output, 18X-555W:** 18,322 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | 18X 555W | 18X-555W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 555 W | 555 W | 100.0% of rated power | | Cool, bright day | 40 °C | 528 W | 528 W | 95.0% of rated power | | Typical summer roof | 55 °C | 500 W | 500 W | 90.1% of rated power | | Hot roof | 70 °C | 473 W | 473 W | 85.2% of rated power | ## Against the whole database | Measure | 18X 555W | 18X-555W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,958 | #7,958 | 14,005 | Tied - the same position in the database | | Power density | #8,148 | #8,148 | 14,005 | Tied - the same position in the database | | Heat behaviour | #8,545 | #8,545 | 14,005 | Tied - the same position in the database | | Weight | #4,712 | #4,712 | 14,005 | Tied - the same position in the database | | Warranty | #9,798 | #9,798 | 14,005 | Tied - the same position in the database | | Overall | #4,808 | #4,808 | 14,005 | Tied - the same position in the database | ## Questions ### Which panel is better: HT-SAAE HT72-18X 555W or HT-SAAE HT72-18X-555W? According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of HT-SAAE HT72-18X 555W and HT-SAAE HT72-18X-555W? **HT-SAAE HT72-18X **555 W**** has a module efficiency of **21.50%**, while **HT-SAAE HT72-18X-**555 W**** is **21.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does HT-SAAE HT72-18X 555W use vs HT-SAAE HT72-18X-555W? **HT-SAAE HT72-18X **555 W**** uses **PERC** cells; **HT-SAAE HT72-18X-**555 W**** uses **PERC**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on HT-SAAE HT72-18X 555W and HT-SAAE HT72-18X-555W? **HT-SAAE HT72-18X **555 W**** has a **25 years** power warranty; **HT-SAAE HT72-18X-**555 W**** has a **25 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ## Related comparisons - [HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X 560W](https://comparepv.com/compare/ht-saae-ht72-18x-555w/ht-saae-ht72-18x-560w) - One difference: module efficiency - [HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X 550W](https://comparepv.com/compare/ht-saae-ht72-18x-555w/ht-saae-ht72-18x-550w) - One difference: module efficiency - [HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X 545W](https://comparepv.com/compare/ht-saae-ht72-18x-555w/ht-saae-ht72-18x-545w) - 3 differences, the largest is module efficiency - [HT-SAAE HT72-18X 555W vs HT-SAAE HT72-18X 540W](https://comparepv.com/compare/ht-saae-ht72-18x-555w/ht-saae-ht72-18x-540w) - 3 differences, the largest is module efficiency - [HT-SAAE HT72-18X-555W vs HT-SAAE HT72-18X-560W](https://comparepv.com/compare/ht-saae-ht72-18x-555w-1/ht-saae-ht72-18x-560w-1) - 2 differences, the largest is cell technology - [HT-SAAE HT72-18X-555W vs HT-SAAE HT72-18X-550W](https://comparepv.com/compare/ht-saae-ht72-18x-555w-1/ht-saae-ht72-18x-550w-1) - One difference: module efficiency --- Source: https://comparepv.com/compare/ht-saae-ht72-18x-555w/ht-saae-ht72-18x-555w-1 Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.