--- title: "Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V435M-FB - Solar Panel Comparison | ComparePV" description: "Compare Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V435M-FB 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-topcon-435w/resun-solar-rs8v435m-fb" updated: 2026-09-11 --- # Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V435M-FB RS8V-M TOPCON-435W leads on the differences that matter The largest is temperature coefficient: 0.050 %/°C better in heat. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Resun Solar RS8V-M TOPCON-435W](https://comparepv.com/panel/resun-solar-rs8v-m-topcon-435w) | [Resun Solar RS8V435M-FB](https://comparepv.com/panel/resun-solar-rs8v435m-fb) | | Manufacturer | Resun Solar | Resun Solar | | Power | 435 Wp | 435 Wp | | Efficiency | 22.28 % | 22.28 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | RS8V-M TOPCON-435W | RS8V435M-FB | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.300 %/°C | -0.350 %/°C | +0.050 %/°C for RS8V-M TOPCON-435W | | Product warranty | 12 yrs | 15 yrs | +3 yrs for RS8V435M-FB | | Annual degradation | 0.40 %/yr | 0.50 %/yr | -0.10 %/yr for RS8V-M TOPCON-435W | ## Every compared parameter | Parameter | RS8V-M TOPCON-435W | RS8V435M-FB | | --- | --- | --- | | Rated power | 435 Wp | 435 Wp | | Module efficiency | 22.28 % | 22.28 % | | Power density | 222.8 Wp/m² | 222.8 Wp/m² | | Open-circuit voltage | 38.60 V | 37.97 V | | Voltage at max power | 32.40 V | 32.25 V | | Short-circuit current | 14.31 A | 14.35 A | | Current at max power | 13.43 A | 13.49 A | | Temperature coefficient | -0.300 %/°C | -0.350 %/°C | | Dimensions | 1722x1134x30 mm | 1722x1134x30 mm | | Module area | 1.953 m² | 1.953 m² | | Weight | 21.5 kg | 21.5 kg | | Weight per kWp | 49.4 kg/kWp | 49.4 kg/kWp | | Product warranty | 12 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.50 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 108 | 108 | | Bifacial | No | No | ## Thirty-year yield Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year - **Cumulative output, RS8V-M TOPCON-435W:** 14,595 kWh - **Cumulative output, RS8V435M-FB:** 14,368 kWh - **Gap:** 227 kWh ## Output when hot | Condition | Cell temperature | RS8V-M TOPCON-435W | RS8V435M-FB | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 435 W | 435 W | 100.0% of rated power | | Cool, bright day | 40 °C | 415 W | 412 W | 94.8% of rated power | | Typical summer roof | 55 °C | 396 W | 389 W | 89.5% of rated power | | Hot roof | 70 °C | 376 W | 366 W | 84.2% of rated power | ## Against the whole database | Measure | RS8V-M TOPCON-435W | RS8V435M-FB | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,403 | #5,403 | 14,005 | Tied - the same position in the database | | Power density | #5,150 | #5,150 | 14,005 | Tied - the same position in the database | | Heat behaviour | #6,093 | #10,419 | 14,005 | RS8V-M TOPCON-435W leads by 4,326 places | | Weight | #2,936 | #2,936 | 14,005 | Tied - the same position in the database | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,695 | #9,138 | 14,005 | RS8V435M-FB leads by 557 places | ## Questions ### Which panel is better: Resun Solar RS8V-M TOPCON-435W or Resun Solar RS8V435M-FB? According to our database: **Resun Solar RS8V-M TOPCON-**435 W**** tolerates heat better (temp coeff **-0.300%/°C** vs **-0.350%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Resun Solar RS8V-M TOPCON-435W and Resun Solar RS8V435M-FB? **Resun Solar RS8V-M TOPCON-**435 W**** has a module efficiency of **22.28%**, while **Resun Solar RS8V435M-FB** 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 TOPCON-435W use vs Resun Solar RS8V435M-FB? **Resun Solar RS8V-M TOPCON-**435 W**** uses **TOPCon** cells; **Resun Solar RS8V435M-FB** 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 TOPCON-435W and Resun Solar RS8V435M-FB? **Resun Solar RS8V-M TOPCON-**435 W**** has a **30 years** power warranty; **Resun Solar RS8V435M-FB** 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 TOPCON-435W vs Resun Solar RS8V-M-DG](https://comparepv.com/compare/resun-solar-rs8v-m-topcon-435w/resun-solar-rs8v-m-dg) - 6 differences, the largest is product warranty - [Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V-M-DG-440](https://comparepv.com/compare/resun-solar-rs8v-m-topcon-435w/resun-solar-rs8v-m-dg-440) - 6 differences, the largest is product warranty - [Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V-M-435W FULL BLACK](https://comparepv.com/compare/resun-solar-rs8v-m-topcon-435w/resun-solar-rs8v-m-435w-full-black) - 2 differences, the largest is temperature coefficient - [Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V-M-DG-435](https://comparepv.com/compare/resun-solar-rs8v-m-topcon-435w/resun-solar-rs8v-m-dg-435) - 5 differences, the largest is product warranty - [Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V-M-430W FULL BLACK](https://comparepv.com/compare/resun-solar-rs8v-m-topcon-435w/resun-solar-rs8v-m-430w-full-black) - 3 differences, the largest is temperature coefficient - [Resun Solar RS8V-M TOPCON-435W vs Resun Solar RS8V-M TOPCON-430W](https://comparepv.com/compare/resun-solar-rs8v-m-topcon-435w/resun-solar-rs8v-m-topcon-430w) - One difference: module efficiency --- Source: https://comparepv.com/compare/resun-solar-rs8v-m-topcon-435w/resun-solar-rs8v435m-fb 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.