--- title: "Solaria Solaria PowerXT-410C-BD vs Solaria Solaria PowerXT-420C-BD - Solar Panel Comparison | ComparePV" description: "Compare Solaria Solaria PowerXT-410C-BD vs Solaria Solaria PowerXT-420C-BD side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-solaria-powerxt-420c-bd" updated: 2026-09-11 --- # Solaria Solaria PowerXT-410C-BD vs Solaria Solaria PowerXT-420C-BD 420C-BD leads on the differences that matter The largest is module efficiency: 0.50 pp more efficient. 13 of 16 comparable parameters are identical, with 3 more left out because at least one datasheet does not publish them. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Solaria Solaria PowerXT-410C-BD](https://comparepv.com/panel/solaria-solaria-powerxt-410c-bd) | [Solaria Solaria PowerXT-420C-BD](https://comparepv.com/panel/solaria-solaria-powerxt-420c-bd) | | Manufacturer | Solaria | Solaria | | Power | 410 Wp | 420 Wp | | Efficiency | 18.90 % | 19.40 % | | Technology | | | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 410C-BD | 420C-BD | Difference | | --- | --- | --- | --- | | Module efficiency | 18.90 % | 19.40 % | +0.50 pp for 420C-BD | | Power density | 189.5 Wp/m² | 194.1 Wp/m² | +4.6 Wp/m² for 420C-BD | | Rated power | 410 Wp | 420 Wp | +10 W for 420C-BD | ## Every compared parameter | Parameter | 410C-BD | 420C-BD | | --- | --- | --- | | Rated power | 410 Wp | 420 Wp | | Module efficiency | 18.90 % | 19.40 % | | Power density | 189.5 Wp/m² | 194.1 Wp/m² | | Open-circuit voltage | 47.20 V | 47.40 V | | Voltage at max power | 38.50 V | 39.10 V | | Short-circuit current | 11.29 A | 11.33 A | | Current at max power | 10.66 A | 10.77 A | | Temperature coefficient | -0.390 %/°C | -0.390 %/°C | | Dimensions | 1939x1116x40 mm | 1939x1116x40 mm | | Module area | 2.164 m² | 2.164 m² | | Weight | 29.0 kg | 29.0 kg | | Weight per kWp | 70.7 kg/kWp | 69.0 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 25 yrs | 25 yrs | | Annual degradation | - | - | | Cell technology | - | - | | Cell type | Monocrystalline | Monocrystalline | | Cell count | - | - | | 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 (-0.390 %/°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, 410C-BD:** 13,756 kWh - **Cumulative output, 420C-BD:** 14,092 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | 410C-BD | 420C-BD | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 410 W | 420 W | 100.0% of rated power | | Cool, bright day | 40 °C | 386 W | 395 W | 94.2% of rated power | | Typical summer roof | 55 °C | 362 W | 371 W | 88.3% of rated power | | Hot roof | 70 °C | 338 W | 346 W | 82.5% of rated power | ## Against the whole database | Measure | 410C-BD | 420C-BD | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #12,996 | #12,735 | 14,005 | 420C-BD leads by 261 places | | Power density | #12,969 | #12,726 | 14,005 | 420C-BD leads by 243 places | | Heat behaviour | #13,579 | #13,579 | 14,005 | Tied - the same position in the database | | Weight | #13,437 | #13,359 | 14,005 | 420C-BD leads by 78 places | | Warranty | #9,798 | #9,798 | 14,005 | Tied - the same position in the database | | Overall | #11,707 | #11,183 | 14,005 | 420C-BD leads by 524 places | ## Questions ### Which panel is better: Solaria Solaria PowerXT-410C-BD or Solaria Solaria PowerXT-420C-BD? According to our database: **Solaria **Solaria** PowerXT-420C-BD** has higher module efficiency (**19.40%** vs **18.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solaria Solaria PowerXT-410C-BD and Solaria Solaria PowerXT-420C-BD? **Solaria **Solaria** PowerXT-410C-BD** has a module efficiency of **18.90%**, while **Solaria **Solaria** PowerXT-420C-BD** is **19.40%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Solaria Solaria PowerXT-410C-BD use vs Solaria Solaria PowerXT-420C-BD? **Solaria **Solaria** PowerXT-410C-BD** uses Monocrystalline cells; **Solaria **Solaria** PowerXT-420C-BD** 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 Solaria Solaria PowerXT-410C-BD and Solaria Solaria PowerXT-420C-BD? **Solaria **Solaria** PowerXT-410C-BD** has a **25 years** power warranty; **Solaria **Solaria** PowerXT-420C-BD** 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 - [Solaria Solaria PowerXT-410C-BD vs Solaria Solaria PowerXT-430C-PD](https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-solaria-powerxt-430c-pd) - 4 differences, the largest is module efficiency - [Solaria Solaria PowerXT-410C-BD vs Solaria Solaria PowerXT-420C-PD](https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-solaria-powerxt-420c-pd) - 3 differences, the largest is module efficiency - [Solaria Solaria PowerXT-410C-BD vs Solaria SPV680-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-spv680-tg12-132bd) - 14 differences, the largest is module efficiency - [Solaria Solaria PowerXT-410C-BD vs Solaria SPV675-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-spv675-tg12-132bd) - 13 differences, the largest is module efficiency - [Solaria Solaria PowerXT-410C-BD vs Solaria SPV670-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-spv670-tg12-132bd) - 13 differences, the largest is module efficiency - [Solaria Solaria PowerXT-410C-BD vs Solaria SPV665-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-spv665-tg12-132bd) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/solaria-solaria-powerxt-410c-bd/solaria-solaria-powerxt-420c-bd 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.