--- title: "Solaria Solaria PowerXT-420C-BD vs Solaria Solaria PowerXT-420C-PD - Solar Panel Comparison | ComparePV" description: "Compare Solaria Solaria PowerXT-420C-BD vs Solaria Solaria PowerXT-420C-PD 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-420c-bd/solaria-solaria-powerxt-420c-pd" updated: 2026-09-11 --- # Solaria Solaria PowerXT-420C-BD vs Solaria Solaria PowerXT-420C-PD Identical on every published parameter All 16 comparable parameters agree, with 3 more left out because at least one datasheet does not publish them. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Solaria Solaria PowerXT-420C-BD](https://comparepv.com/panel/solaria-solaria-powerxt-420c-bd) | [Solaria Solaria PowerXT-420C-PD](https://comparepv.com/panel/solaria-solaria-powerxt-420c-pd) | | Manufacturer | Solaria | Solaria | | Power | 420 Wp | 420 Wp | | Efficiency | 19.40 % | 19.40 % | | Technology | | | ## Every compared parameter | Parameter | Solaria PowerXT-420C-BD | Solaria PowerXT-420C-PD | | --- | --- | --- | | Rated power | 420 Wp | 420 Wp | | Module efficiency | 19.40 % | 19.40 % | | Power density | 194.1 Wp/m² | 194.1 Wp/m² | | Open-circuit voltage | 47.40 V | 47.10 V | | Voltage at max power | 39.10 V | 38.80 V | | Short-circuit current | 11.33 A | 11.39 A | | Current at max power | 10.77 A | 10.82 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 | 69.0 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, Solaria PowerXT-420C-BD:** 14,092 kWh - **Cumulative output, Solaria PowerXT-420C-PD:** 14,092 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | Solaria PowerXT-420C-BD | Solaria PowerXT-420C-PD | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 420 W | 420 W | 100.0% of rated power | | Cool, bright day | 40 °C | 395 W | 395 W | 94.2% of rated power | | Typical summer roof | 55 °C | 371 W | 371 W | 88.3% of rated power | | Hot roof | 70 °C | 346 W | 346 W | 82.5% of rated power | ## Against the whole database | Measure | Solaria PowerXT-420C-BD | Solaria PowerXT-420C-PD | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #12,735 | #12,735 | 14,005 | Tied - the same position in the database | | Power density | #12,726 | #12,726 | 14,005 | Tied - the same position in the database | | Heat behaviour | #13,579 | #13,579 | 14,005 | Tied - the same position in the database | | Weight | #13,359 | #13,359 | 14,005 | Tied - the same position in the database | | Warranty | #9,798 | #9,798 | 14,005 | Tied - the same position in the database | | Overall | #11,183 | #11,183 | 14,005 | Tied - the same position in the database | ## Questions ### Which panel is better: Solaria Solaria PowerXT-420C-BD or Solaria Solaria PowerXT-420C-PD? According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solaria Solaria PowerXT-420C-BD and Solaria Solaria PowerXT-420C-PD? **Solaria **Solaria** PowerXT-420C-BD** has a module efficiency of **19.40%**, while **Solaria **Solaria** PowerXT-420C-PD** 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-420C-BD use vs Solaria Solaria PowerXT-420C-PD? **Solaria **Solaria** PowerXT-420C-BD** uses Monocrystalline cells; **Solaria **Solaria** PowerXT-420C-PD** 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-420C-BD and Solaria Solaria PowerXT-420C-PD? **Solaria **Solaria** PowerXT-420C-BD** has a **25 years** power warranty; **Solaria **Solaria** PowerXT-420C-PD** 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-420C-BD vs Solaria Solaria PowerXT-430C-PD](https://comparepv.com/compare/solaria-solaria-powerxt-420c-bd/solaria-solaria-powerxt-430c-pd) - 3 differences, the largest is module efficiency - [Solaria Solaria PowerXT-420C-BD vs Solaria Solaria PowerXT-410C-BD](https://comparepv.com/compare/solaria-solaria-powerxt-420c-bd/solaria-solaria-powerxt-410c-bd) - 3 differences, the largest is module efficiency - [Solaria Solaria PowerXT-420C-BD vs Solaria SPV680-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-420c-bd/solaria-spv680-tg12-132bd) - 13 differences, the largest is module efficiency - [Solaria Solaria PowerXT-420C-BD vs Solaria SPV675-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-420c-bd/solaria-spv675-tg12-132bd) - 13 differences, the largest is module efficiency - [Solaria Solaria PowerXT-420C-BD vs Solaria SPV670-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-420c-bd/solaria-spv670-tg12-132bd) - 13 differences, the largest is module efficiency - [Solaria Solaria PowerXT-420C-BD vs Solaria SPV665-TG12-132BD](https://comparepv.com/compare/solaria-solaria-powerxt-420c-bd/solaria-spv665-tg12-132bd) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/solaria-solaria-powerxt-420c-bd/solaria-solaria-powerxt-420c-pd 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.