--- title: "JA Solar MYM2072-375 vs JA Solar MYM2072-385 - Solar Panel Comparison | ComparePV" description: "Compare JA Solar MYM2072-375 vs JA Solar MYM2072-385 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2072-385" image: "https://comparepv.com/og/compare/panels/ja-solar-mym2072-375/ja-solar-mym2072-385.png" updated: 2026-09-11 --- # JA Solar MYM2072-375 vs JA Solar MYM2072-385 385 leads on the differences that matter The largest is module efficiency: 0.51 pp more efficient. 15 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 | [JA Solar MYM2072-375](https://comparepv.com/panel/ja-solar-mym2072-375) | [JA Solar MYM2072-385](https://comparepv.com/panel/ja-solar-mym2072-385) | | Manufacturer | JA Solar | JA Solar | | Power | 375 Wp | 385 Wp | | Efficiency | 19.33 % | 19.84 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 375 | 385 | Difference | | --- | --- | --- | --- | | Module efficiency | 19.33 % | 19.84 % | +0.51 pp for 385 | | Power density | 193.3 Wp/m² | 198.4 Wp/m² | +5.2 Wp/m² for 385 | | Rated power | 375 Wp | 385 Wp | +10 W for 385 | ## Every compared parameter | Parameter | 375 | 385 | | --- | --- | --- | | Rated power | 375 Wp | 385 Wp | | Module efficiency | 19.33 % | 19.84 % | | Power density | 193.3 Wp/m² | 198.4 Wp/m² | | Open-circuit voltage | 48.70 V | 49.10 V | | Voltage at max power | 39.80 V | 40.30 V | | Short-circuit current | 9.94 A | 10.10 A | | Current at max power | 9.42 A | 9.55 A | | Temperature coefficient | -0.370 %/°C | -0.370 %/°C | | Dimensions | 1956x992x40 mm | 1956x992x40 mm | | Module area | 1.940 m² | 1.940 m² | | Weight | 22.5 kg | 22.5 kg | | Weight per kWp | 60.0 kg/kWp | 58.4 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 25 yrs | 25 yrs | | Annual degradation | - | - | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 72 | 72 | | Bifacial | No | No | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.370 %/°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, 375:** 12,582 kWh - **Cumulative output, 385:** 12,918 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | 375 | 385 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 375 W | 385 W | 100.0% of rated power | | Cool, bright day | 40 °C | 354 W | 364 W | 94.5% of rated power | | Typical summer roof | 55 °C | 333 W | 342 W | 88.9% of rated power | | Hot roof | 70 °C | 313 W | 321 W | 83.3% of rated power | ## Against the whole database | Measure | 375 | 385 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #12,783 | #12,408 | 14,005 | 385 leads by 375 places | | Power density | #12,766 | #12,383 | 14,005 | 385 leads by 383 places | | Heat behaviour | #13,081 | #13,081 | 14,005 | Tied - the same position in the database | | Weight | #12,326 | #11,726 | 14,005 | 385 leads by 600 places | | Warranty | #9,798 | #9,798 | 14,005 | Tied - the same position in the database | | Overall | #12,760 | #12,529 | 14,005 | 385 leads by 231 places | ## Questions ### Which panel is better: JA Solar MYM2072-375 or JA Solar MYM2072-385? According to our database: **JA Solar MYM2072-385** has higher module efficiency (**19.84%** vs **19.33%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of JA Solar MYM2072-375 and JA Solar MYM2072-385? **JA Solar MYM2072-375** has a module efficiency of **19.33%**, while **JA Solar MYM2072-385** is **19.84%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does JA Solar MYM2072-375 use vs JA Solar MYM2072-385? **JA Solar MYM2072-375** uses **PERC** cells; **JA Solar MYM2072-385** 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 JA Solar MYM2072-375 and JA Solar MYM2072-385? **JA Solar MYM2072-375** has a **25 years** power warranty; **JA Solar MYM2072-385** 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 - [JA Solar MYM2072-375 vs JA Solar MYM2072-380](https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2072-380) - One difference: module efficiency - [JA Solar MYM2072-375 vs JA Solar MYM2072-370](https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2072-370) - One difference: module efficiency - [JA Solar MYM2072-375 vs JA Solar MYM2072-365](https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2072-365) - 3 differences, the largest is module efficiency - [JA Solar MYM2072-375 vs JA Solar MYM2060-325](https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2060-325) - 10 differences, the largest is module efficiency - [JA Solar MYM2072-375 vs JA Solar MYM2060-320](https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2060-320) - 10 differences, the largest is rated power - [JA Solar MYM2072-375 vs JA Solar MYM2060-315](https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2060-315) - 7 differences, the largest is rated power --- Source: https://comparepv.com/compare/ja-solar-mym2072-375/ja-solar-mym2072-385 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.