--- title: "Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS8V-M-435W FULL BLACK - Solar Panel Comparison | ComparePV" description: "Compare Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS8V-M-435W FULL BLACK side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs8v-m-435w-full-black" updated: 2026-09-11 --- # Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS8V-M-435W FULL BLACK 435W FULL BLACK leads on the differences that matter The largest is module efficiency: 0.52 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Resun Solar RS8V-M-425W FULL BLACK](https://comparepv.com/panel/resun-solar-rs8v-m-425w-full-black) | [Resun Solar RS8V-M-435W FULL BLACK](https://comparepv.com/panel/resun-solar-rs8v-m-435w-full-black) | | Manufacturer | Resun Solar | Resun Solar | | Power | 425 Wp | 435 Wp | | Efficiency | 21.76 % | 22.28 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 425W FULL BLACK | 435W FULL BLACK | Difference | | --- | --- | --- | --- | | Module efficiency | 21.76 % | 22.28 % | +0.52 pp for 435W FULL BLACK | | Power density | 217.6 Wp/m² | 222.8 Wp/m² | +5.1 Wp/m² for 435W FULL BLACK | | Rated power | 425 Wp | 435 Wp | +10 W for 435W FULL BLACK | ## Every compared parameter | Parameter | 425W FULL BLACK | 435W FULL BLACK | | --- | --- | --- | | Rated power | 425 Wp | 435 Wp | | Module efficiency | 21.76 % | 22.28 % | | Power density | 217.6 Wp/m² | 222.8 Wp/m² | | Open-circuit voltage | 37.71 V | 37.97 V | | Voltage at max power | 31.94 V | 32.25 V | | Short-circuit current | 14.19 A | 14.35 A | | Current at max power | 13.31 A | 13.49 A | | Temperature coefficient | -0.250 %/°C | -0.250 %/°C | | Dimensions | 1722x1134x30 mm | 1722x1134x30 mm | | Module area | 1.953 m² | 1.953 m² | | Weight | 21.5 kg | 21.5 kg | | Weight per kWp | 50.6 kg/kWp | 49.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | 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 (-0.250 %/°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, 425W FULL BLACK:** 14,260 kWh - **Cumulative output, 435W FULL BLACK:** 14,595 kWh - **Gap:** 335 kWh ## Output when hot | Condition | Cell temperature | 425W FULL BLACK | 435W FULL BLACK | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 425 W | 435 W | 100.0% of rated power | | Cool, bright day | 40 °C | 409 W | 419 W | 96.2% of rated power | | Typical summer roof | 55 °C | 393 W | 402 W | 92.5% of rated power | | Hot roof | 70 °C | 377 W | 386 W | 88.8% of rated power | ## Against the whole database | Measure | 425W FULL BLACK | 435W FULL BLACK | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,285 | #5,403 | 14,005 | 435W FULL BLACK leads by 1,882 places | | Power density | #7,172 | #5,150 | 14,005 | 435W FULL BLACK leads by 2,022 places | | Heat behaviour | #456 | #456 | 14,005 | Tied - the same position in the database | | Weight | #3,991 | #2,936 | 14,005 | 435W FULL BLACK leads by 1,055 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,910 | #9,138 | 14,005 | 435W FULL BLACK leads by 772 places | ## Questions ### Which panel is better: Resun Solar RS8V-M-425W FULL BLACK or Resun Solar RS8V-M-435W FULL BLACK? According to our database: **Resun Solar RS8V-M-**435 W** FULL BLACK** has higher module efficiency (**22.28%** vs **21.76%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Resun Solar RS8V-M-425W FULL BLACK and Resun Solar RS8V-M-435W FULL BLACK? **Resun Solar RS8V-M-**425 W** FULL BLACK** has a module efficiency of **21.76%**, while **Resun Solar RS8V-M-**435 W** FULL BLACK** is **22.28%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Resun Solar RS8V-M-425W FULL BLACK use vs Resun Solar RS8V-M-435W FULL BLACK? **Resun Solar RS8V-M-**425 W** FULL BLACK** uses **TOPCon** cells; **Resun Solar RS8V-M-**435 W** FULL BLACK** 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 Resun Solar RS8V-M-425W FULL BLACK and Resun Solar RS8V-M-435W FULL BLACK? **Resun Solar RS8V-M-**425 W** FULL BLACK** has a **30 years** power warranty; **Resun Solar RS8V-M-**435 W** FULL BLACK** 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 - [Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS8V-M-430W FULL BLACK](https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs8v-m-430w-full-black) - One difference: module efficiency - [Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS8V-M-420W FULL BLACK](https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs8v-m-420w-full-black) - One difference: module efficiency - [Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS9H-M TOPCON-735](https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs9h-m-topcon-735) - 14 differences, the largest is module efficiency - [Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS9H-M TOPCON-730](https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs9h-m-topcon-730) - 14 differences, the largest is module efficiency - [Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS9H-M TOPCON-725](https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs9h-m-topcon-725) - 14 differences, the largest is module efficiency - [Resun Solar RS8V-M-425W FULL BLACK vs Resun Solar RS9H-M TOPCON-720](https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs9h-m-topcon-720) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/resun-solar-rs8v-m-425w-full-black/resun-solar-rs8v-m-435w-full-black 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.