--- title: "Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-440 - Solar Panel Comparison | ComparePV" description: "Compare Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-440 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-dg/resun-solar-rs8v-m-dg-440" updated: 2026-09-11 --- # Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-440 Identical on every published parameter All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Resun Solar RS8V-M-DG](https://comparepv.com/panel/resun-solar-rs8v-m-dg) | [Resun Solar RS8V-M-DG-440](https://comparepv.com/panel/resun-solar-rs8v-m-dg-440) | | Manufacturer | Resun Solar | Resun Solar | | Power | 440 Wp | 440 Wp | | Efficiency | 22.53 % | 22.53 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | RS8V-M-DG | RS8V-M-DG-440 | | --- | --- | --- | | Rated power | 440 Wp | 440 Wp | | Module efficiency | 22.53 % | 22.53 % | | Power density | 225.3 Wp/m² | 225.3 Wp/m² | | Open-circuit voltage | 38.10 V | 38.90 V | | Voltage at max power | 32.41 V | 32.45 V | | Short-circuit current | 14.43 A | 14.36 A | | Current at max power | 13.58 A | 13.56 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 1722x1134x30 mm | 1722x1134x30 mm | | Module area | 1.953 m² | 1.953 m² | | Weight | 23.8 kg | 23.8 kg | | Weight per kWp | 54.1 kg/kWp | 54.1 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 | Yes | Yes | ## 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 (-0.300 %/°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, RS8V-M-DG:** 14,533 kWh - **Cumulative output, RS8V-M-DG-440:** 14,533 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | RS8V-M-DG | RS8V-M-DG-440 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 440 W | 440 W | 100.0% of rated power | | Cool, bright day | 40 °C | 420 W | 420 W | 95.5% of rated power | | Typical summer roof | 55 °C | 400 W | 400 W | 91.0% of rated power | | Hot roof | 70 °C | 381 W | 381 W | 86.5% of rated power | ## Against the whole database | Measure | RS8V-M-DG | RS8V-M-DG-440 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,982 | #3,982 | 14,005 | Tied - the same position in the database | | Power density | #4,099 | #4,099 | 14,005 | Tied - the same position in the database | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #8,316 | #8,316 | 14,005 | Tied - the same position in the database | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #8,801 | #8,801 | 14,005 | Tied - the same position in the database | ## Questions ### Which panel is better: Resun Solar RS8V-M-DG or Resun Solar RS8V-M-DG-440? According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Resun Solar RS8V-M-DG and Resun Solar RS8V-M-DG-440? **Resun Solar RS8V-M-DG** has a module efficiency of **22.53%**, while **Resun Solar RS8V-M-DG-440** is **22.53%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Resun Solar RS8V-M-DG use vs Resun Solar RS8V-M-DG-440? **Resun Solar RS8V-M-DG** uses **TOPCon** cells; **Resun Solar RS8V-M-DG-440** 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-DG and Resun Solar RS8V-M-DG-440? **Resun Solar RS8V-M-DG** has a **30 years** power warranty; **Resun Solar RS8V-M-DG-440** 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 Resun Solar RS8V-M-DG and Resun Solar RS8V-M-DG-440 bifacial panels? Both **Resun Solar RS8V-M-DG** and **Resun Solar RS8V-M-DG-440** 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 - [Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-435](https://comparepv.com/compare/resun-solar-rs8v-m-dg/resun-solar-rs8v-m-dg-435) - One difference: module efficiency - [Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-430](https://comparepv.com/compare/resun-solar-rs8v-m-dg/resun-solar-rs8v-m-dg-430) - 3 differences, the largest is module efficiency - [Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-425](https://comparepv.com/compare/resun-solar-rs8v-m-dg/resun-solar-rs8v-m-dg-425) - 3 differences, the largest is module efficiency - [Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-420](https://comparepv.com/compare/resun-solar-rs8v-m-dg/resun-solar-rs8v-m-dg-420) - 4 differences, the largest is module efficiency - [Resun Solar RS8V-M-DG vs Resun Solar RS8V-M-DG-415](https://comparepv.com/compare/resun-solar-rs8v-m-dg/resun-solar-rs8v-m-dg-415) - 5 differences, the largest is module efficiency - [Resun Solar RS8V-M-DG vs Resun Solar RS9H-M TOPCON-735](https://comparepv.com/compare/resun-solar-rs8v-m-dg/resun-solar-rs9h-m-topcon-735) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/resun-solar-rs8v-m-dg/resun-solar-rs8v-m-dg-440 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.