--- title: "Emmvee ES70HCBT144-T vs Emmvee ES80HCBT144-T - Solar Panel Comparison | ComparePV" description: "Compare Emmvee ES70HCBT144-T vs Emmvee ES80HCBT144-T side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-es80hcbt144-t" updated: 2026-09-11 --- # Emmvee ES70HCBT144-T vs Emmvee ES80HCBT144-T ES80HCBT144-T leads on the differences that matter The largest is module efficiency: 0.38 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Emmvee ES70HCBT144-T](https://comparepv.com/panel/emmvee-es70hcbt144-t) | [Emmvee ES80HCBT144-T](https://comparepv.com/panel/emmvee-es80hcbt144-t) | | Manufacturer | Emmvee | Emmvee | | Power | 570 Wp | 580 Wp | | Efficiency | 22.07 % | 22.45 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | ES70HCBT144-T | ES80HCBT144-T | Difference | | --- | --- | --- | --- | | Module efficiency | 22.07 % | 22.45 % | +0.38 pp for ES80HCBT144-T | | Power density | 220.7 Wp/m² | 224.5 Wp/m² | +3.9 Wp/m² for ES80HCBT144-T | | Rated power | 570 Wp | 580 Wp | +10 W for ES80HCBT144-T | ## Every compared parameter | Parameter | ES70HCBT144-T | ES80HCBT144-T | | --- | --- | --- | | Rated power | 570 Wp | 580 Wp | | Module efficiency | 22.07 % | 22.45 % | | Power density | 220.7 Wp/m² | 224.5 Wp/m² | | Open-circuit voltage | 51.07 V | 51.47 V | | Voltage at max power | 42.29 V | 42.59 V | | Short-circuit current | 14.25 A | 14.37 A | | Current at max power | 13.48 A | 13.62 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2278x1134x30 mm | 2278x1134x30 mm | | Module area | 2.583 m² | 2.583 m² | | Weight | 27.1 kg | 27.1 kg | | Weight per kWp | 47.5 kg/kWp | 46.7 kg/kWp | | Product warranty | 12 yrs | 12 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 | 144 | 144 | | 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 (-0.290 %/°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, ES70HCBT144-T:** 19,125 kWh - **Cumulative output, ES80HCBT144-T:** 19,460 kWh - **Gap:** 335 kWh ## Output when hot | Condition | Cell temperature | ES70HCBT144-T | ES80HCBT144-T | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 570 W | 580 W | 100.0% of rated power | | Cool, bright day | 40 °C | 545 W | 555 W | 95.7% of rated power | | Typical summer roof | 55 °C | 520 W | 530 W | 91.3% of rated power | | Hot roof | 70 °C | 496 W | 504 W | 87.0% of rated power | ## Against the whole database | Measure | ES70HCBT144-T | ES80HCBT144-T | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #6,136 | #4,620 | 14,005 | ES80HCBT144-T leads by 1,516 places | | Power density | #6,058 | #4,547 | 14,005 | ES80HCBT144-T leads by 1,511 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #1,750 | #1,318 | 14,005 | ES80HCBT144-T leads by 432 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #5,172 | #4,408 | 14,005 | ES80HCBT144-T leads by 764 places | ## Questions ### Which panel is better: Emmvee ES70HCBT144-T or Emmvee ES80HCBT144-T? According to our database: **Emmvee ES80HCBT144-T** has higher module efficiency (**22.45%** vs **22.07%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Emmvee ES70HCBT144-T and Emmvee ES80HCBT144-T? **Emmvee ES70HCBT144-T** has a module efficiency of **22.07%**, while **Emmvee ES80HCBT144-T** is **22.45%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Emmvee ES70HCBT144-T use vs Emmvee ES80HCBT144-T? **Emmvee ES70HCBT144-T** uses **TOPCon** cells; **Emmvee ES80HCBT144-T** 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 Emmvee ES70HCBT144-T and Emmvee ES80HCBT144-T? **Emmvee ES70HCBT144-T** has a **30 years** power warranty; **Emmvee ES80HCBT144-T** 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 Emmvee ES70HCBT144-T and Emmvee ES80HCBT144-T bifacial panels? Both **Emmvee ES70HCBT144-T** and **Emmvee ES80HCBT144-T** 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 - [Emmvee ES70HCBT144-T vs Emmvee ES75HCBT144-T](https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-es75hcbt144-t) - The same specification on paper - [Emmvee ES70HCBT144-T vs Emmvee ES65HCBT144-T](https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-es65hcbt144-t) - One difference: module efficiency - [Emmvee ES70HCBT144-T vs Emmvee ES60HCBT144-T](https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-es60hcbt144-t) - 3 differences, the largest is module efficiency - [Emmvee ES70HCBT144-T vs Emmvee E720HCBG 132-T](https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-e720hcbg-132-t) - 12 differences, the largest is module efficiency - [Emmvee ES70HCBT144-T vs Emmvee E720HCBG132-T](https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-e720hcbg132-t) - 12 differences, the largest is module efficiency - [Emmvee ES70HCBT144-T vs Emmvee E715HCBG 132-T](https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-e715hcbg-132-t) - 12 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/emmvee-es70hcbt144-t/emmvee-es80hcbt144-t 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.