--- title: "SpolarPV SPV545-PM10-144 vs SpolarPV SPV555-PM10-144 - Solar Panel Comparison | ComparePV" description: "Compare SpolarPV SPV545-PM10-144 vs SpolarPV SPV555-PM10-144 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv555-pm10-144" updated: 2026-09-11 --- # SpolarPV SPV545-PM10-144 vs SpolarPV SPV555-PM10-144 SPV555-PM10-144 leads on the differences that matter The largest is module efficiency: 0.38 pp more efficient. 15 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [SpolarPV SPV545-PM10-144](https://comparepv.com/panel/spolarpv-spv545-pm10-144) | [SpolarPV SPV555-PM10-144](https://comparepv.com/panel/spolarpv-spv555-pm10-144) | | Manufacturer | SpolarPV | SpolarPV | | Power | 545 Wp | 555 Wp | | Efficiency | 21.12 % | 21.50 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | SPV545-PM10-144 | SPV555-PM10-144 | Difference | | --- | --- | --- | --- | | Module efficiency | 21.12 % | 21.50 % | +0.38 pp for SPV555-PM10-144 | | Power density | 211.2 Wp/m² | 215.0 Wp/m² | +3.9 Wp/m² for SPV555-PM10-144 | | Rated power | 545 Wp | 555 Wp | +10 W for SPV555-PM10-144 | | Open-circuit voltage | 50.01 V | 51.79 V | 1.78 V apart | ## Every compared parameter | Parameter | SPV545-PM10-144 | SPV555-PM10-144 | | --- | --- | --- | | Rated power | 545 Wp | 555 Wp | | Module efficiency | 21.12 % | 21.50 % | | Power density | 211.2 Wp/m² | 215.0 Wp/m² | | Open-circuit voltage | 50.01 V | 51.79 V | | Voltage at max power | 42.37 V | 42.75 V | | Short-circuit current | 13.62 A | 13.74 A | | Current at max power | 12.87 A | 12.98 A | | Temperature coefficient | -0.350 %/°C | -0.350 %/°C | | Dimensions | 2278x1133x30 mm | 2278x1133x30 mm | | Module area | 2.581 m² | 2.581 m² | | Weight | 26.5 kg | 26.5 kg | | Weight per kWp | 48.6 kg/kWp | 47.7 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.45 %/yr | 0.45 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | 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 (-0.350 %/°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, SPV545-PM10-144:** 17,947 kWh - **Cumulative output, SPV555-PM10-144:** 18,277 kWh - **Gap:** 330 kWh ## Output when hot | Condition | Cell temperature | SPV545-PM10-144 | SPV555-PM10-144 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 545 W | 555 W | 100.0% of rated power | | Cool, bright day | 40 °C | 516 W | 526 W | 94.8% of rated power | | Typical summer roof | 55 °C | 488 W | 497 W | 89.5% of rated power | | Hot roof | 70 °C | 459 W | 468 W | 84.2% of rated power | ## Against the whole database | Measure | SPV545-PM10-144 | SPV555-PM10-144 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #9,255 | #7,958 | 14,005 | SPV555-PM10-144 leads by 1,297 places | | Power density | #9,256 | #8,012 | 14,005 | SPV555-PM10-144 leads by 1,244 places | | Heat behaviour | #10,419 | #10,419 | 14,005 | Tied - the same position in the database | | Weight | #2,373 | #1,883 | 14,005 | SPV555-PM10-144 leads by 490 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #7,255 | #6,409 | 14,005 | SPV555-PM10-144 leads by 846 places | ## Questions ### Which panel is better: SpolarPV SPV545-PM10-144 or SpolarPV SPV555-PM10-144? According to our database: **SpolarPV SPV555-PM10-144** has higher module efficiency (**21.50%** vs **21.12%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of SpolarPV SPV545-PM10-144 and SpolarPV SPV555-PM10-144? **SpolarPV SPV545-PM10-144** has a module efficiency of **21.12%**, while **SpolarPV SPV555-PM10-144** is **21.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does SpolarPV SPV545-PM10-144 use vs SpolarPV SPV555-PM10-144? **SpolarPV SPV545-PM10-144** uses **PERC** cells; **SpolarPV SPV555-PM10-144** 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 SpolarPV SPV545-PM10-144 and SpolarPV SPV555-PM10-144? **SpolarPV SPV545-PM10-144** has a **30 years** power warranty; **SpolarPV SPV555-PM10-144** 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 - [SpolarPV SPV545-PM10-144 vs SpolarPV SPV560-PM10-144](https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv560-pm10-144) - 4 differences, the largest is module efficiency - [SpolarPV SPV545-PM10-144 vs SpolarPV SPV550-PM10-144](https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv550-pm10-144) - One difference: open-circuit voltage - [SpolarPV SPV545-PM10-144 vs SpolarPV SPV540-PM10-144](https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv540-pm10-144) - One difference: module efficiency - [SpolarPV SPV545-PM10-144 vs SpolarPV SPV535-PM10-144](https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv535-pm10-144) - 3 differences, the largest is module efficiency - [SpolarPV SPV545-PM10-144 vs SpolarPV SPV700-TG12-132BD](https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv700-tg12-132bd) - 15 differences, the largest is module efficiency - [SpolarPV SPV545-PM10-144 vs SpolarPV SPV695-TG12-132BD](https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv695-tg12-132bd) - 15 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/spolarpv-spv545-pm10-144/spolarpv-spv555-pm10-144 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.