--- title: "EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-670M66-HU/BF-DG - Solar Panel Comparison | ComparePV" description: "Compare EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-670M66-HU/BF-DG side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-670m66-hu-bf-dg" updated: 2026-09-11 --- # EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-670M66-HU/BF-DG 670M66-HU/BF-DG leads on the differences that matter The largest is module efficiency: 0.72 pp more efficient. 9 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [EGing PV EG-590M60-HU/BF-DG](https://comparepv.com/panel/eging-pv-eg-590m60-hu-bf-dg) | [EGing PV EG-670M66-HU/BF-DG](https://comparepv.com/panel/eging-pv-eg-670m66-hu-bf-dg) | | Manufacturer | EGing PV | EGing PV | | Power | 590 Wp | 670 Wp | | Efficiency | 20.84 % | 21.56 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 590M60-HU/BF-DG | 670M66-HU/BF-DG | Difference | | --- | --- | --- | --- | | Module efficiency | 20.84 % | 21.56 % | +0.72 pp for 670M66-HU/BF-DG | | Rated power | 590 Wp | 670 Wp | +80 W for 670M66-HU/BF-DG | | Weight | 35.0 kg | 38.3 kg | -3.3 kg for 590M60-HU/BF-DG | | Power density | 208.5 Wp/m² | 215.7 Wp/m² | +7.2 Wp/m² for 670M66-HU/BF-DG | | Open-circuit voltage | 41.31 V | 46.20 V | 4.89 V apart | | Module area | 2.830 m² | 3.106 m² | 0.276 m² apart | | Voltage at max power | 34.21 V | 38.38 V | 4.17 V apart | | Cell count | 120 | 132 | 12 cells apart | | Weight per kWp | 59.3 kg/kWp | 57.2 kg/kWp | -2.2 kg/kWp for 670M66-HU/BF-DG | | Dimensions | 2172x1303x35 mm | 2384x1303x35 mm | 2172x1303x35 mm vs 2384x1303x35 mm | ## Every compared parameter | Parameter | 590M60-HU/BF-DG | 670M66-HU/BF-DG | | --- | --- | --- | | Rated power | 590 Wp | 670 Wp | | Module efficiency | 20.84 % | 21.56 % | | Power density | 208.5 Wp/m² | 215.7 Wp/m² | | Open-circuit voltage | 41.31 V | 46.20 V | | Voltage at max power | 34.21 V | 38.38 V | | Short-circuit current | 18.30 A | 18.51 A | | Current at max power | 17.25 A | 17.46 A | | Temperature coefficient | -0.340 %/°C | -0.340 %/°C | | Dimensions | 2172x1303x35 mm | 2384x1303x35 mm | | Module area | 2.830 m² | 3.106 m² | | Weight | 35.0 kg | 38.3 kg | | Weight per kWp | 59.3 kg/kWp | 57.2 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.45 %/yr | 0.45 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 120 | 132 | | 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 (-0.340 %/°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, 590M60-HU/BF-DG:** 19,429 kWh - **Cumulative output, 670M66-HU/BF-DG:** 22,064 kWh - **Gap:** 2,635 kWh ## Output when hot | Condition | Cell temperature | 590M60-HU/BF-DG | 670M66-HU/BF-DG | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 590 W | 670 W | 100.0% of rated power | | Cool, bright day | 40 °C | 560 W | 636 W | 94.9% of rated power | | Typical summer roof | 55 °C | 530 W | 602 W | 89.8% of rated power | | Hot roof | 70 °C | 500 W | 567 W | 84.7% of rated power | ## Against the whole database | Measure | 590M60-HU/BF-DG | 670M66-HU/BF-DG | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #10,421 | #7,774 | 14,005 | 670M66-HU/BF-DG leads by 2,647 places | | Power density | #10,359 | #7,644 | 14,005 | 670M66-HU/BF-DG leads by 2,715 places | | Heat behaviour | #8,778 | #8,778 | 14,005 | Tied - the same position in the database | | Weight | #12,099 | #11,112 | 14,005 | 670M66-HU/BF-DG leads by 987 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #6,044 | #2,497 | 14,005 | 670M66-HU/BF-DG leads by 3,547 places | ## Questions ### Which panel is better: EGing PV EG-590M60-HU/BF-DG or EGing PV EG-670M66-HU/BF-DG? According to our database: **EGing PV EG-670M66-HU/BF-DG** has higher module efficiency (**21.56%** vs **20.84%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of EGing PV EG-590M60-HU/BF-DG and EGing PV EG-670M66-HU/BF-DG? **EGing PV EG-590M60-HU/BF-DG** has a module efficiency of **20.84%**, while **EGing PV EG-670M66-HU/BF-DG** is **21.56%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does EGing PV EG-590M60-HU/BF-DG use vs EGing PV EG-670M66-HU/BF-DG? **EGing PV EG-590M60-HU/BF-DG** uses **PERC** cells; **EGing PV EG-670M66-HU/BF-DG** uses **PERC**. 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 EGing PV EG-590M60-HU/BF-DG and EGing PV EG-670M66-HU/BF-DG? **EGing PV EG-590M60-HU/BF-DG** has a **30 years** power warranty; **EGing PV EG-670M66-HU/BF-DG** 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 EGing PV EG-590M60-HU/BF-DG and EGing PV EG-670M66-HU/BF-DG bifacial panels? Both **EGing PV EG-590M60-HU/BF-DG** and **EGing PV EG-670M66-HU/BF-DG** 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 - [EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-685NT66-HU/BF-DG](https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-685nt66-hu-bf-dg) - 13 differences, the largest is module efficiency - [EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-680NT66-HU/BF-DG](https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-680nt66-hu-bf-dg) - 13 differences, the largest is module efficiency - [EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-675NT66-HU/BF-DG](https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-675nt66-hu-bf-dg) - 13 differences, the largest is module efficiency - [EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-670NT66-HU/BF-DG](https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-670nt66-hu-bf-dg) - 13 differences, the largest is temperature coefficient - [EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-670M66-HUV](https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-670m66-huv) - 13 differences, the largest is module efficiency - [EGing PV EG-590M60-HU/BF-DG vs EGing PV EG-665NT66-HU/BF-DG](https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-665nt66-hu-bf-dg) - 12 differences, the largest is temperature coefficient --- Source: https://comparepv.com/compare/eging-pv-eg-590m60-hu-bf-dg/eging-pv-eg-670m66-hu-bf-dg 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.