--- title: "Longi Solar 605M vs Longi Solar LGi7-72HTD-615M - Solar Panel Comparison | ComparePV" description: "Compare Longi Solar 605M vs Longi Solar LGi7-72HTD-615M side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/longi-605m/longi-solar-lgi7-72htd-615m" image: "https://comparepv.com/og/compare/panels/longi-605m/longi-solar-lgi7-72htd-615m.png" updated: 2026-09-11 --- # Longi Solar 605M vs Longi Solar LGi7-72HTD-615M LGi7-72HTD-615M leads on the differences that matter The largest is module efficiency: 0.30 pp more efficient. 14 of 17 comparable parameters are identical, with 2 more left out because at least one datasheet does not publish them. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Longi Solar 605M](https://comparepv.com/panel/longi-605m) | [Longi Solar LGi7-72HTD-615M](https://comparepv.com/panel/longi-solar-lgi7-72htd-615m) | | Manufacturer | Longi Solar | Longi Solar | | Power | 605 Wp | 615 Wp | | Efficiency | 22.60 % | 22.90 % | | Technology | | | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 605M | LGi7-72HTD-615M | Difference | | --- | --- | --- | --- | | Module efficiency | 22.60 % | 22.90 % | +0.30 pp for LGi7-72HTD-615M | | Power density | 225.7 Wp/m² | 229.5 Wp/m² | +3.7 Wp/m² for LGi7-72HTD-615M | | Rated power | 605 Wp | 615 Wp | +10 W for LGi7-72HTD-615M | ## Every compared parameter | Parameter | 605M | LGi7-72HTD-615M | | --- | --- | --- | | Rated power | 605 Wp | 615 Wp | | Module efficiency | 22.60 % | 22.90 % | | Power density | 225.7 Wp/m² | 229.5 Wp/m² | | Open-circuit voltage | 52.66 V | 52.96 V | | Voltage at max power | 44.33 V | 44.63 V | | Short-circuit current | 14.62 A | 14.75 A | | Current at max power | 13.65 A | 13.78 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2376x1128x5 mm | 2376x1128x5 mm | | Module area | 2.680 m² | 2.680 m² | | Weight | 31.0 kg | 31.0 kg | | Weight per kWp | 51.2 kg/kWp | 50.4 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 25 yrs | 25 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | - | - | | Cell type | Monocrystalline | Monocrystalline | | Cell count | - | 72 | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.280 %/°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, 605M:** 20,299 kWh - **Cumulative output, LGi7-72HTD-615M:** 20,634 kWh - **Gap:** 335 kWh ## Output when hot | Condition | Cell temperature | 605M | LGi7-72HTD-615M | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 605 W | 615 W | 100.0% of rated power | | Cool, bright day | 40 °C | 580 W | 589 W | 95.8% of rated power | | Typical summer roof | 55 °C | 554 W | 563 W | 91.6% of rated power | | Hot roof | 70 °C | 529 W | 538 W | 87.4% of rated power | ## Against the whole database | Measure | 605M | LGi7-72HTD-615M | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,716 | #2,412 | 14,129 | LGi7-72HTD-615M leads by 1,304 places | | Power density | #3,901 | #2,367 | 14,129 | LGi7-72HTD-615M leads by 1,534 places | | Heat behaviour | #1,347 | #1,347 | 14,129 | Tied - the same position in the database | | Weight | #4,655 | #3,802 | 14,129 | LGi7-72HTD-615M leads by 853 places | | Warranty | #9,912 | #9,912 | 14,129 | Tied - the same position in the database | | Overall | #2,015 | #1,620 | 14,129 | LGi7-72HTD-615M leads by 395 places | ## Questions ### Which panel is better: Longi Solar 605M or Longi Solar LGi7-72HTD-615M? According to our database: **Longi Solar LGi7-72HTD-615M** has higher module efficiency (**22.90%** vs **22.60%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Longi Solar 605M and Longi Solar LGi7-72HTD-615M? **Longi Solar 605M** has a module efficiency of **22.60%**, while **Longi Solar LGi7-72HTD-615M** is **22.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Longi Solar 605M use vs Longi Solar LGi7-72HTD-615M? **Longi Solar 605M** uses Monocrystalline cells; **Longi Solar LGi7-72HTD-615M** uses Monocrystalline. 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 Longi Solar 605M and Longi Solar LGi7-72HTD-615M? **Longi Solar 605M** has a **25 years** power warranty; **Longi Solar LGi7-72HTD-615M** 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 - [Longi Solar 605M vs Longi Solar 620M](https://comparepv.com/compare/longi-605m/longi-620m) - 3 differences, the largest is module efficiency - [Longi Solar 605M vs Longi Solar LGi7-72HTD-620M](https://comparepv.com/compare/longi-605m/longi-solar-lgi7-72htd-620m) - 3 differences, the largest is module efficiency - [Longi Solar 605M vs Longi Solar 615M](https://comparepv.com/compare/longi-605m/longi-615m) - 3 differences, the largest is module efficiency - [Longi Solar 605M vs Longi Solar 610M](https://comparepv.com/compare/longi-605m/longi-610m) - One difference: module efficiency - [Longi Solar 605M vs Longi Solar LGi7-72HTD-610M](https://comparepv.com/compare/longi-605m/longi-solar-lgi7-72htd-610m) - One difference: module efficiency - [Longi Solar 605M vs Longi Solar LGi7-72HTD-605M](https://comparepv.com/compare/longi-605m/longi-solar-lgi7-72htd-605m) - The same specification on paper --- Source: https://comparepv.com/compare/longi-605m/longi-solar-lgi7-72htd-615m 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.