--- title: "AE Solar MD-144BS-545 vs AE Solar MD-144BS-550W - Solar Panel Comparison | ComparePV" description: "Compare AE Solar MD-144BS-545 vs AE Solar MD-144BS-550W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-md-144bs-550w" updated: 2026-09-11 --- # AE Solar MD-144BS-545 vs AE Solar MD-144BS-550W 545 leads on the differences that matter The largest is product warranty: 15 yrs longer. 16 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [AE Solar MD-144BS-545](https://comparepv.com/panel/ae-solar-md-144bs-545) | [AE Solar MD-144BS-550W](https://comparepv.com/panel/ae-solar-md-144bs-550w) | | Manufacturer | AE Solar | AE Solar | | Power | 545 Wp | 550 Wp | | Efficiency | 21.12 % | 21.31 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 545 | 550W | Difference | | --- | --- | --- | --- | | Product warranty | 30 yrs | 15 yrs | +15 yrs for 545 | | Open-circuit voltage | 50.01 V | 51.44 V | 1.43 V apart | ## Every compared parameter | Parameter | 545 | 550W | | --- | --- | --- | | Rated power | 545 Wp | 550 Wp | | Module efficiency | 21.12 % | 21.31 % | | Power density | 211.2 Wp/m² | 213.1 Wp/m² | | Open-circuit voltage | 50.01 V | 51.44 V | | Voltage at max power | 42.38 V | 42.57 V | | Short-circuit current | 13.62 A | 13.67 A | | Current at max power | 12.86 A | 12.92 A | | Temperature coefficient | -0.350 %/°C | -0.350 %/°C | | Dimensions | 2278x1133x30 mm | 2278x1133x30 mm | | Module area | 2.581 m² | 2.581 m² | | Weight | 26.5 kg | 26.5 kg | | Weight per kWp | 48.6 kg/kWp | 48.2 kg/kWp | | Product warranty | 30 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | 0.55 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | Yes | Yes | ## 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 (-0.350 %/°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, 545:** 17,992 kWh - **Cumulative output, 550W:** 18,157 kWh - **Gap:** 165 kWh ## Output when hot | Condition | Cell temperature | 545 | 550W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 545 W | 550 W | 100.0% of rated power | | Cool, bright day | 40 °C | 516 W | 521 W | 94.8% of rated power | | Typical summer roof | 55 °C | 488 W | 492 W | 89.5% of rated power | | Hot roof | 70 °C | 459 W | 463 W | 84.2% of rated power | ## Against the whole database | Measure | 545 | 550W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #9,255 | #8,503 | 14,005 | 550W leads by 752 places | | Power density | #9,256 | #8,474 | 14,005 | 550W leads by 782 places | | Heat behaviour | #10,419 | #10,419 | 14,005 | Tied - the same position in the database | | Weight | #2,373 | #2,087 | 14,005 | 550W leads by 286 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #3,473 | #6,124 | 14,005 | 545 leads by 2,651 places | ## Questions ### Which panel is better: AE Solar MD-144BS-545 or AE Solar MD-144BS-550W? According to our database: **AE Solar MD-144BS-**550 W**** has higher module efficiency (**21.31%** vs **21.12%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of AE Solar MD-144BS-545 and AE Solar MD-144BS-550W? **AE Solar MD-144BS-545** has a module efficiency of **21.12%**, while **AE Solar MD-144BS-**550 W**** is **21.31%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does AE Solar MD-144BS-545 use vs AE Solar MD-144BS-550W? **AE Solar MD-144BS-545** uses **PERC** cells; **AE Solar MD-144BS-**550 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 AE Solar MD-144BS-545 and AE Solar MD-144BS-550W? **AE Solar MD-144BS-545** has a **30 years** power warranty; **AE Solar MD-144BS-**550 W**** has a **30 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. ### Are AE Solar MD-144BS-545 and AE Solar MD-144BS-550W bifacial panels? Both **AE Solar MD-144BS-545** and **AE Solar MD-144BS-**550 W**** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [AE Solar MD-144BS-545 vs AE Solar MD-144BS-550](https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-md-144bs-550) - One difference: open-circuit voltage - [AE Solar MD-144BS-545 vs AE Solar AE MD-144BD-550](https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-ae-md-144bd-550) - 4 differences, the largest is weight - [AE Solar MD-144BS-545 vs AE Solar AE MD-144BD-545](https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-ae-md-144bd-545) - 3 differences, the largest is weight - [AE Solar MD-144BS-545 vs AE Solar MD-144BS-545W](https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-md-144bs-545w) - One difference: product warranty - [AE Solar MD-144BS-545 vs AE Solar MD-144BS-540](https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-md-144bs-540) - One difference: module efficiency - [AE Solar MD-144BS-545 vs AE Solar AE MD-144BD-540](https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-ae-md-144bd-540) - 4 differences, the largest is weight --- Source: https://comparepv.com/compare/ae-solar-md-144bs-545/ae-solar-md-144bs-550w 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.