--- title: "Peimar SA500M (FB) vs Peimar SG325P - Solar Panel Comparison | ComparePV" description: "Compare Peimar SA500M (FB) vs Peimar SG325P side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/peimar-sa500m-fb/peimar-sg325p" updated: 2026-09-23 --- # Peimar SA500M (FB) vs Peimar SG325P SA500M (FB) leads on the differences that matter The largest is module efficiency: 4.59 pp more efficient. 4 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Peimar SA500M (FB)](https://comparepv.com/panel/peimar-sa500m-fb) | [Peimar SG325P](https://comparepv.com/panel/peimar-sg325p) | | Manufacturer | Peimar | Peimar | | Power | 500 Wp | 325 Wp | | Efficiency | 21.33 % | 16.74 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | SA500M (FB) | SG325P | Difference | | --- | --- | --- | --- | | Module efficiency | 21.33 % | 16.74 % | +4.59 pp for SA500M (FB) | | Temperature coefficient | -0.290 %/°C | -0.430 %/°C | +0.140 %/°C for SA500M (FB) | | Rated power | 500 Wp | 325 Wp | +175 W for SA500M (FB) | | Power density | 213.3 Wp/m² | 167.4 Wp/m² | +45.9 Wp/m² for SA500M (FB) | | Weight per kWp | 46.8 kg/kWp | 69.2 kg/kWp | -22.4 kg/kWp for SA500M (FB) | | Product warranty | 30 yrs | 20 yrs | +10 yrs for SA500M (FB) | | Short-circuit current | 14.03 A | 9.74 A | 4.29 A apart | | Module area | 2.344 m² | 1.941 m² | 0.403 m² apart | | Current at max power | 13.24 A | 9.03 A | 4.21 A apart | | Cell count | 66 | 72 | 6 cells apart | | Open-circuit voltage | 46.46 V | 44.60 V | 1.86 V apart | | Dimensions | 2067x1134x35 mm | 1957x992x40 mm | 2067x1134x35 mm vs 1957x992x40 mm | | Cell type | Monocrystalline | Polycrystalline | Monocrystalline vs Polycrystalline | | Voltage at max power | 37.77 V | 36.30 V | 1.47 V apart | ## Every compared parameter | Parameter | SA500M (FB) | SG325P | | --- | --- | --- | | Rated power | 500 Wp | 325 Wp | | Module efficiency | 21.33 % | 16.74 % | | Power density | 213.3 Wp/m² | 167.4 Wp/m² | | Open-circuit voltage | 46.46 V | 44.60 V | | Voltage at max power | 37.77 V | 36.30 V | | Short-circuit current | 14.03 A | 9.74 A | | Current at max power | 13.24 A | 9.03 A | | Temperature coefficient | -0.290 %/°C | -0.430 %/°C | | Dimensions | 2067x1134x35 mm | 1957x992x40 mm | | Module area | 2.344 m² | 1.941 m² | | Weight | 23.4 kg | 22.5 kg | | Weight per kWp | 46.8 kg/kWp | 69.2 kg/kWp | | Product warranty | 30 yrs | 20 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Polycrystalline | | Cell count | 66 | 72 | | 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 - **Cumulative output, SA500M (FB):** 16,776 kWh - **Cumulative output, SG325P:** 10,904 kWh - **Gap:** 5,872 kWh ## Output when hot | Condition | Cell temperature | SA500M (FB) | SG325P | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 500 W | 325 W | 100.0% of rated power | | Cool, bright day | 40 °C | 478 W | 304 W | 93.5% of rated power | | Typical summer roof | 55 °C | 457 W | 283 W | 87.1% of rated power | | Hot roof | 70 °C | 435 W | 262 W | 80.7% of rated power | ## Against the whole database | Measure | SA500M (FB) | SG325P | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #8,476 | #13,521 | 14,005 | SA500M (FB) leads by 5,045 places | | Power density | #8,438 | #13,515 | 14,005 | SA500M (FB) leads by 5,077 places | | Heat behaviour | #2,165 | #13,847 | 14,005 | SA500M (FB) leads by 11,682 places | | Weight | #1,355 | #13,370 | 14,005 | SA500M (FB) leads by 12,015 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #4,753 | #13,109 | 14,005 | SA500M (FB) leads by 8,356 places | ## Questions ### Which panel is better: Peimar SA500M (FB) or Peimar SG325P? According to our database: **Peimar SA500M (FB)** has higher module efficiency (**21.33%** vs **16.74%**); **Peimar SA500M (FB)** tolerates heat better (temp coeff **-0.290%/°C** vs **-0.430%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Peimar SA500M (FB) and Peimar SG325P? **Peimar SA500M (FB)** has a module efficiency of **21.33%**, while **Peimar SG325P** is **16.74%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Peimar SA500M (FB) use vs Peimar SG325P? **Peimar SA500M (FB)** uses **PERC** cells; **Peimar SG325P** uses **PERC**. 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 Peimar SA500M (FB) and Peimar SG325P? **Peimar SA500M (FB)** has a **30 years** power warranty; **Peimar SG325P** 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 - [Peimar SG325P vs Peimar SG330P](https://comparepv.com/compare/peimar-sg325p/peimar-sg330p) - One difference: module efficiency - [Peimar SA500M (FB) vs Peimar OR10H595MNDB](https://comparepv.com/compare/peimar-sa500m-fb/peimar-or10h595mndb) - 13 differences, the largest is module efficiency - [Peimar SA500M (FB) vs Peimar OR10H450MNDB (FB)](https://comparepv.com/compare/peimar-sa500m-fb/peimar-or10h450mndb-fb) - 12 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/peimar-sa500m-fb/peimar-sg325p 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.