--- title: "TN Solar TN5-54H-385 vs TN Solar TN5-54H-390 - Solar Panel Comparison | ComparePV" description: "Compare TN Solar TN5-54H-385 vs TN Solar TN5-54H-390 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-tn5-54h-390" updated: 2026-09-11 --- # TN Solar TN5-54H-385 vs TN Solar TN5-54H-390 390 leads on the differences that matter The largest is module efficiency: 0.25 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [TN Solar TN5-54H-385](https://comparepv.com/panel/tn-solar-tn5-54h-385) | [TN Solar TN5-54H-390](https://comparepv.com/panel/tn-solar-tn5-54h-390) | | Manufacturer | TN Solar | TN Solar | | Power | 385 Wp | 390 Wp | | Efficiency | 19.72 % | 19.97 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 385 | 390 | Difference | | --- | --- | --- | --- | | Module efficiency | 19.72 % | 19.97 % | +0.25 pp for 390 | ## Every compared parameter | Parameter | 385 | 390 | | --- | --- | --- | | Rated power | 385 Wp | 390 Wp | | Module efficiency | 19.72 % | 19.97 % | | Power density | 197.2 Wp/m² | 199.7 Wp/m² | | Open-circuit voltage | 38.83 V | 38.92 V | | Voltage at max power | 32.52 V | 32.56 V | | Short-circuit current | 12.31 A | 12.43 A | | Current at max power | 11.84 A | 11.98 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 1722x1134x30 mm | 1722x1134x30 mm | | Module area | 1.953 m² | 1.953 m² | | Weight | 21.0 kg | 21.0 kg | | Weight per kWp | 54.5 kg/kWp | 53.8 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | 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 (-0.300 %/°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, 385:** 12,918 kWh - **Cumulative output, 390:** 13,085 kWh - **Gap:** 167 kWh ## Output when hot | Condition | Cell temperature | 385 | 390 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 385 W | 390 W | 100.0% of rated power | | Cool, bright day | 40 °C | 368 W | 372 W | 95.5% of rated power | | Typical summer roof | 55 °C | 350 W | 355 W | 91.0% of rated power | | Hot roof | 70 °C | 333 W | 337 W | 86.5% of rated power | ## Against the whole database | Measure | 385 | 390 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #12,501 | #12,302 | 14,005 | 390 leads by 199 places | | Power density | #12,493 | #12,255 | 14,005 | 390 leads by 238 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #8,872 | #7,897 | 14,005 | 390 leads by 975 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #10,920 | #10,672 | 14,005 | 390 leads by 248 places | ## Questions ### Which panel is better: TN Solar TN5-54H-385 or TN Solar TN5-54H-390? According to our database: **TN Solar TN5-54H-390** has higher module efficiency (**19.97%** vs **19.72%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of TN Solar TN5-54H-385 and TN Solar TN5-54H-390? **TN Solar TN5-54H-385** has a module efficiency of **19.72%**, while **TN Solar TN5-54H-390** is **19.97%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does TN Solar TN5-54H-385 use vs TN Solar TN5-54H-390? **TN Solar TN5-54H-385** uses **TOPCon** cells; **TN Solar TN5-54H-390** uses **TOPCon**. 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 TN Solar TN5-54H-385 and TN Solar TN5-54H-390? **TN Solar TN5-54H-385** has a **30 years** power warranty; **TN Solar TN5-54H-390** 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. ## Related comparisons - [TN Solar TN5-54H-385 vs TN Solar TN5-54H-380](https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-tn5-54h-380) - One difference: module efficiency - [TN Solar TN5-54H-385 vs TN Solar TN5-54H-375](https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-tn5-54h-375) - 3 differences, the largest is module efficiency - [TN Solar TN5-54H-385 vs TN Solar TN5-54H-370](https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-tn5-54h-370) - 4 differences, the largest is module efficiency - [TN Solar TN5-54H-385 vs TN Solar SE6-66HBD-715](https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-se6-66hbd-715) - 14 differences, the largest is module efficiency - [TN Solar TN5-54H-385 vs TN Solar SE6-66HBD-710](https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-se6-66hbd-710) - 14 differences, the largest is module efficiency - [TN Solar TN5-54H-385 vs TN Solar SE6-66HBD-705](https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-se6-66hbd-705) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/tn-solar-tn5-54h-385/tn-solar-tn5-54h-390 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.