--- title: "Solitek Forza 650 vs Solitek SOLID Framed Transparent 505 - Solar Panel Comparison | ComparePV" description: "Compare Solitek Forza 650 vs Solitek SOLID Framed Transparent 505 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-solid-framed-transparent-505" updated: 2026-09-11 --- # Solitek Forza 650 vs Solitek SOLID Framed Transparent 505 Forza 650 leads on the differences that matter The largest is module efficiency: 0.66 pp more efficient. 7 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Solitek Forza 650](https://comparepv.com/panel/ginlong-solis-forza-650) | [Solitek SOLID Framed Transparent 505](https://comparepv.com/panel/ginlong-solis-solid-framed-transparent-505) | | Manufacturer | Solitek | Solitek | | Power | 650 Wp | 505 Wp | | Efficiency | 22.97 % | 22.31 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | Forza 650 | SOLID Framed Transparent 505 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.97 % | 22.31 % | +0.66 pp for Forza 650 | | Rated power | 650 Wp | 505 Wp | +145 W for Forza 650 | | Weight | 34.2 kg | 29.0 kg | -5.2 kg for SOLID Framed Transparent 505 | | Product warranty | 25 yrs | 30 yrs | +5 yrs for SOLID Framed Transparent 505 | | Power density | 229.7 Wp/m² | 223.1 Wp/m² | +6.6 Wp/m² for Forza 650 | | Short-circuit current | 18.48 A | 14.25 A | 4.23 A apart | | Module area | 2.830 m² | 2.263 m² | 0.567 m² apart | | Weight per kWp | 52.6 kg/kWp | 57.4 kg/kWp | -4.8 kg/kWp for Forza 650 | | Annual degradation | 0.40 %/yr | 0.31 %/yr | -0.09 %/yr for SOLID Framed Transparent 505 | | Open-circuit voltage | 44.28 V | 42.28 V | 2.00 V apart | | Current at max power | 17.43 A | 13.85 A | 3.58 A apart | | Dimensions | 2172x1303x30 mm | 1996x1134x30 mm | 2172x1303x30 mm vs 1996x1134x30 mm | ## Every compared parameter | Parameter | Forza 650 | SOLID Framed Transparent 505 | | --- | --- | --- | | Rated power | 650 Wp | 505 Wp | | Module efficiency | 22.97 % | 22.31 % | | Power density | 229.7 Wp/m² | 223.1 Wp/m² | | Open-circuit voltage | 44.28 V | 42.28 V | | Voltage at max power | 37.30 V | 36.47 V | | Short-circuit current | 18.48 A | 14.25 A | | Current at max power | 17.43 A | 13.85 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2172x1303x30 mm | 1996x1134x30 mm | | Module area | 2.830 m² | 2.263 m² | | Weight | 34.2 kg | 29.0 kg | | Weight per kWp | 52.6 kg/kWp | 57.4 kg/kWp | | Product warranty | 25 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.31 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 120 | 120 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.300 %/°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, Forza 650:** 21,809 kWh - **Cumulative output, SOLID Framed Transparent 505:** 17,181 kWh - **Gap:** 4,628 kWh ## Output when hot | Condition | Cell temperature | Forza 650 | SOLID Framed Transparent 505 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 650 W | 505 W | 100.0% of rated power | | Cool, bright day | 40 °C | 621 W | 482 W | 95.5% of rated power | | Typical summer roof | 55 °C | 592 W | 460 W | 91.0% of rated power | | Hot roof | 70 °C | 562 W | 437 W | 86.5% of rated power | ## Against the whole database | Measure | Forza 650 | SOLID Framed Transparent 505 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,237 | #5,082 | 14,005 | Forza 650 leads by 2,845 places | | Power density | #2,160 | #5,068 | 14,005 | Forza 650 leads by 2,908 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #6,240 | #11,209 | 14,005 | Forza 650 leads by 4,969 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #551 | #3,634 | 14,005 | Forza 650 leads by 3,083 places | ## Questions ### Which panel is better: Solitek Forza 650 or Solitek SOLID Framed Transparent 505? According to our database: **Solitek Forza 650** has higher module efficiency (**22.97%** vs **22.31%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Solitek Forza 650 and Solitek SOLID Framed Transparent 505? **Solitek Forza 650** has a module efficiency of **22.97%**, while **Solitek SOLID Framed Transparent 505** is **22.31%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Solitek Forza 650 use vs Solitek SOLID Framed Transparent 505? **Solitek Forza 650** uses **TOPCon** cells; **Solitek SOLID Framed Transparent 505** 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 Solitek Forza 650 and Solitek SOLID Framed Transparent 505? **Solitek Forza 650** has a **30 years** power warranty; **Solitek SOLID Framed Transparent 505** 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 Solitek Forza 650 and Solitek SOLID Framed Transparent 505 bifacial panels? Both **Solitek Forza 650** and **Solitek SOLID Framed Transparent 505** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Solitek Forza 650 vs Solitek Forza 720](https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-forza-720) - 8 differences, the largest is rated power - [Solitek Forza 650 vs Solitek SOLID Framed White 720W](https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-solid-framed-white-720w) - 8 differences, the largest is rated power - [Solitek Forza 650 vs Solitek SOLID Framed White 650W](https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-solid-framed-white-650w) - The same specification on paper - [Solitek Forza 650 vs Solitek Magnus 510](https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-magnus-510) - 12 differences, the largest is rated power - [Solitek Forza 650 vs Solitek SOLRIF D Black 455](https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-solrif-d-black-455) - 13 differences, the largest is rated power - [Solitek Forza 650 vs Solitek SOLID Semi-Clear Framed 455 W](https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-solid-semi-clear-framed-455-w) - 13 differences, the largest is rated power --- Source: https://comparepv.com/compare/ginlong-solis-forza-650/ginlong-solis-solid-framed-transparent-505 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.