--- title: "Solaria Solaria PowerX-400R vs Solaria SPV675-TG12-132BD - Solar Panel Comparison | ComparePV" description: "Compare Solaria Solaria PowerX-400R vs Solaria SPV675-TG12-132BD 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-powerx-400r/solaria-spv675-tg12-132bd" updated: 2026-09-11 --- # Solaria Solaria PowerX-400R vs Solaria SPV675-TG12-132BD SPV675-TG12-132BD leads on the differences that matter The largest is module efficiency: 1.26 pp more efficient. 2 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 PowerX-400R](https://comparepv.com/panel/solaria-solaria-powerx-400r) | [Solaria SPV675-TG12-132BD](https://comparepv.com/panel/solaria-spv675-tg12-132bd) | | Manufacturer | Solaria | Solaria | | Power | 400 Wp | 675 Wp | | Efficiency | 20.50 % | 21.76 % | | Technology | | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | Solaria PowerX-400R | SPV675-TG12-132BD | Difference | | --- | --- | --- | --- | | Module efficiency | 20.50 % | 21.76 % | +1.26 pp for SPV675-TG12-132BD | | Temperature coefficient | -0.360 %/°C | -0.300 %/°C | +0.060 %/°C for SPV675-TG12-132BD | | Rated power | 400 Wp | 675 Wp | +275 W for SPV675-TG12-132BD | | Power density | 204.7 Wp/m² | 217.6 Wp/m² | +12.8 Wp/m² for SPV675-TG12-132BD | | Performance warranty | 25 yrs | 30 yrs | +5 yrs for SPV675-TG12-132BD | | Weight | 22.1 kg | 38.0 kg | -15.9 kg for Solaria PowerX-400R | | Product warranty | 25 yrs | 12 yrs | +13 yrs for Solaria PowerX-400R | | Open-circuit voltage | 37.30 V | 46.70 V | 9.40 V apart | | Short-circuit current | 13.68 A | 17.93 A | 4.25 A apart | | Module area | 1.954 m² | 3.103 m² | 1.149 m² apart | | Voltage at max power | 31.00 V | 39.43 V | 8.43 V apart | | Current at max power | 12.90 A | 17.14 A | 4.24 A apart | | Bifacial | No | Yes | No vs Yes | | Dimensions | 1723x1134x35 mm | 2383x1302x30 mm | 1723x1134x35 mm vs 2383x1302x30 mm | ## Every compared parameter | Parameter | Solaria PowerX-400R | SPV675-TG12-132BD | | --- | --- | --- | | Rated power | 400 Wp | 675 Wp | | Module efficiency | 20.50 % | 21.76 % | | Power density | 204.7 Wp/m² | 217.6 Wp/m² | | Open-circuit voltage | 37.30 V | 46.70 V | | Voltage at max power | 31.00 V | 39.43 V | | Short-circuit current | 13.68 A | 17.93 A | | Current at max power | 12.90 A | 17.14 A | | Temperature coefficient | -0.360 %/°C | -0.300 %/°C | | Dimensions | 1723x1134x35 mm | 2383x1302x30 mm | | Module area | 1.954 m² | 3.103 m² | | Weight | 22.1 kg | 38.0 kg | | Weight per kWp | 55.2 kg/kWp | 56.3 kg/kWp | | Product warranty | 25 yrs | 12 yrs | | Performance warranty | 25 yrs | 30 yrs | | Annual degradation | 0.50 %/yr | - | | Cell technology | - | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | - | 132 | | Bifacial | No | Yes | ## Thirty-year yield Declared first-year losses, with 0.40% a year afterwards assumed for both panels, at 1,200 kWh/kWp a year - **Cumulative output, Solaria PowerX-400R:** 13,277 kWh - **Cumulative output, SPV675-TG12-132BD:** 22,405 kWh - **Gap:** 9,128 kWh ## Output when hot | Condition | Cell temperature | Solaria PowerX-400R | SPV675-TG12-132BD | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 400 W | 675 W | 100.0% of rated power | | Cool, bright day | 40 °C | 378 W | 645 W | 94.6% of rated power | | Typical summer roof | 55 °C | 357 W | 614 W | 89.2% of rated power | | Hot roof | 70 °C | 335 W | 584 W | 83.8% of rated power | ## Against the whole database | Measure | Solaria PowerX-400R | SPV675-TG12-132BD | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #11,308 | #7,285 | 14,005 | SPV675-TG12-132BD leads by 4,023 places | | Power density | #11,499 | #7,310 | 14,005 | SPV675-TG12-132BD leads by 4,189 places | | Heat behaviour | #12,345 | #6,093 | 14,005 | SPV675-TG12-132BD leads by 6,252 places | | Weight | #9,691 | #10,556 | 14,005 | Solaria PowerX-400R leads by 865 places | | Warranty | #9,798 | #21 | 14,005 | SPV675-TG12-132BD leads by 9,777 places | | Overall | #10,732 | #2,161 | 14,005 | SPV675-TG12-132BD leads by 8,571 places | ## Questions ### Which panel is better: Solaria Solaria PowerX-400R or Solaria SPV675-TG12-132BD? According to our database: **Solaria SPV675-TG12-132BD** has higher module efficiency (**21.76%** vs **20.50%**); **Solaria SPV675-TG12-132BD** tolerates heat better (temp coeff **-0.300%/°C** vs **-0.360%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solaria Solaria PowerX-400R and Solaria SPV675-TG12-132BD? **Solaria **Solaria** PowerX-400R** has a module efficiency of **20.50%**, while **Solaria SPV675-TG12-132BD** is **21.76%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Solaria Solaria PowerX-400R use vs Solaria SPV675-TG12-132BD? **Solaria **Solaria** PowerX-400R** uses Monocrystalline cells; **Solaria SPV675-TG12-132BD** 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 Solaria Solaria PowerX-400R and Solaria SPV675-TG12-132BD? **Solaria **Solaria** PowerX-400R** has a **25 years** power warranty; **Solaria SPV675-TG12-132BD** 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. ### Are Solaria Solaria PowerX-400R and Solaria SPV675-TG12-132BD bifacial panels? **Solaria SPV675-TG12-132BD** is bifacial (captures light from both faces); **Solaria **Solaria** PowerX-400R** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Solaria Solaria PowerX-400R vs Solaria Solaria PowerX-395R](https://comparepv.com/compare/solaria-solaria-powerx-400r/solaria-solaria-powerx-395r) - One difference: module efficiency - [Solaria Solaria PowerX-400R vs Solaria Solaria PowerX-390R](https://comparepv.com/compare/solaria-solaria-powerx-400r/solaria-solaria-powerx-390r) - 3 differences, the largest is module efficiency - [Solaria SPV675-TG12-132BD vs Solaria SPV680-TG12-132BD](https://comparepv.com/compare/solaria-spv675-tg12-132bd/solaria-spv680-tg12-132bd) - The same specification on paper - [Solaria SPV675-TG12-132BD vs Solaria SPV670-TG12-132BD](https://comparepv.com/compare/solaria-spv675-tg12-132bd/solaria-spv670-tg12-132bd) - The same specification on paper - [Solaria SPV675-TG12-132BD vs Solaria SPV665-TG12-132BD](https://comparepv.com/compare/solaria-spv675-tg12-132bd/solaria-spv665-tg12-132bd) - 3 differences, the largest is module efficiency - [Solaria SPV675-TG12-132BD vs Solaria SPV660-TG12-132BD](https://comparepv.com/compare/solaria-spv675-tg12-132bd/solaria-spv660-tg12-132bd) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/solaria-solaria-powerx-400r/solaria-spv675-tg12-132bd 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.