--- title: "Resun Solar RS8V420M-FB vs Resun Solar RS8V430M-FB - Solar Panel Comparison | ComparePV" description: "Compare Resun Solar RS8V420M-FB vs Resun Solar RS8V430M-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-rs8v420m-fb/resun-solar-rs8v430m-fb" updated: 2026-09-11 --- # Resun Solar RS8V420M-FB vs Resun Solar RS8V430M-FB RS8V430M-FB leads on the differences that matter The largest is module efficiency: 0.51 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Resun Solar RS8V420M-FB](https://comparepv.com/panel/resun-solar-rs8v420m-fb) | [Resun Solar RS8V430M-FB](https://comparepv.com/panel/resun-solar-rs8v430m-fb) | | Manufacturer | Resun Solar | Resun Solar | | Power | 420 Wp | 430 Wp | | Efficiency | 21.51 % | 22.02 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | RS8V420M-FB | RS8V430M-FB | Difference | | --- | --- | --- | --- | | Module efficiency | 21.51 % | 22.02 % | +0.51 pp for RS8V430M-FB | | Power density | 215.1 Wp/m² | 220.2 Wp/m² | +5.1 Wp/m² for RS8V430M-FB | | Rated power | 420 Wp | 430 Wp | +10 W for RS8V430M-FB | ## Every compared parameter | Parameter | RS8V420M-FB | RS8V430M-FB | | --- | --- | --- | | Rated power | 420 Wp | 430 Wp | | Module efficiency | 21.51 % | 22.02 % | | Power density | 215.1 Wp/m² | 220.2 Wp/m² | | Open-circuit voltage | 37.58 V | 37.84 V | | Voltage at max power | 31.78 V | 32.09 V | | Short-circuit current | 14.11 A | 14.27 A | | Current at max power | 13.22 A | 13.40 A | | Temperature coefficient | -0.350 %/°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 | 51.2 kg/kWp | 50.0 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.50 %/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 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, RS8V420M-FB:** 13,873 kWh - **Cumulative output, RS8V430M-FB:** 14,203 kWh - **Gap:** 330 kWh ## Output when hot | Condition | Cell temperature | RS8V420M-FB | RS8V430M-FB | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 420 W | 430 W | 100.0% of rated power | | Cool, bright day | 40 °C | 398 W | 407 W | 94.8% of rated power | | Typical summer roof | 55 °C | 376 W | 385 W | 89.5% of rated power | | Hot roof | 70 °C | 354 W | 362 W | 84.2% of rated power | ## Against the whole database | Measure | RS8V420M-FB | RS8V430M-FB | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,894 | #6,329 | 14,005 | RS8V430M-FB leads by 1,565 places | | Power density | #7,882 | #6,481 | 14,005 | RS8V430M-FB leads by 1,401 places | | Heat behaviour | #10,419 | #10,419 | 14,005 | Tied - the same position in the database | | Weight | #4,567 | #3,317 | 14,005 | RS8V430M-FB leads by 1,250 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #10,194 | #9,520 | 14,005 | RS8V430M-FB leads by 674 places | ## Questions ### Which panel is better: Resun Solar RS8V420M-FB or Resun Solar RS8V430M-FB? According to our database: **Resun Solar RS8V430M-FB** has higher module efficiency (**22.02%** vs **21.51%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Resun Solar RS8V420M-FB and Resun Solar RS8V430M-FB? **Resun Solar RS8V420M-FB** has a module efficiency of **21.51%**, while **Resun Solar RS8V430M-FB** is **22.02%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Resun Solar RS8V420M-FB use vs Resun Solar RS8V430M-FB? **Resun Solar RS8V420M-FB** uses **TOPCon** cells; **Resun Solar RS8V430M-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 RS8V420M-FB and Resun Solar RS8V430M-FB? **Resun Solar RS8V420M-FB** has a **30 years** power warranty; **Resun Solar RS8V430M-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 RS8V420M-FB vs Resun Solar RS8V435M-FB](https://comparepv.com/compare/resun-solar-rs8v420m-fb/resun-solar-rs8v435m-fb) - 3 differences, the largest is module efficiency - [Resun Solar RS8V420M-FB vs Resun Solar RS8V425M-FB](https://comparepv.com/compare/resun-solar-rs8v420m-fb/resun-solar-rs8v425m-fb) - One difference: module efficiency - [Resun Solar RS8V420M-FB vs Resun Solar RS9H-M TOPCON-735](https://comparepv.com/compare/resun-solar-rs8v420m-fb/resun-solar-rs9h-m-topcon-735) - 13 differences, the largest is module efficiency - [Resun Solar RS8V420M-FB vs Resun Solar RS9H-M TOPCON-730](https://comparepv.com/compare/resun-solar-rs8v420m-fb/resun-solar-rs9h-m-topcon-730) - 13 differences, the largest is module efficiency - [Resun Solar RS8V420M-FB vs Resun Solar RS9H-M TOPCON-725](https://comparepv.com/compare/resun-solar-rs8v420m-fb/resun-solar-rs9h-m-topcon-725) - 13 differences, the largest is module efficiency - [Resun Solar RS8V420M-FB vs Resun Solar RS9H-M TOPCON-720](https://comparepv.com/compare/resun-solar-rs8v420m-fb/resun-solar-rs9h-m-topcon-720) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/resun-solar-rs8v420m-fb/resun-solar-rs8v430m-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.