--- title: "Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT730W - Solar Panel Comparison | ComparePV" description: "Compare Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT730W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht730w" updated: 2026-09-11 --- # Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT730W 66HT730W leads on the differences that matter The largest is module efficiency: 0.30 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Hanersun HN21N-66HT720W](https://comparepv.com/panel/hanersun-hn21n-66ht720w) | [Hanersun HN21N-66HT730W](https://comparepv.com/panel/hanersun-hn21n-66ht730w) | | Manufacturer | Hanersun | Hanersun | | Power | 720 Wp | 730 Wp | | Efficiency | 23.20 % | 23.50 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 66HT720W | 66HT730W | Difference | | --- | --- | --- | --- | | Module efficiency | 23.20 % | 23.50 % | +0.30 pp for 66HT730W | | Power density | 231.8 Wp/m² | 235.0 Wp/m² | +3.2 Wp/m² for 66HT730W | | Rated power | 720 Wp | 730 Wp | +10 W for 66HT730W | ## Every compared parameter | Parameter | 66HT720W | 66HT730W | | --- | --- | --- | | Rated power | 720 Wp | 730 Wp | | Module efficiency | 23.20 % | 23.50 % | | Power density | 231.8 Wp/m² | 235.0 Wp/m² | | Open-circuit voltage | 49.00 V | 49.40 V | | Voltage at max power | 41.20 V | 41.60 V | | Short-circuit current | 18.50 A | 18.58 A | | Current at max power | 17.48 A | 17.55 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2384x1303x33 mm | 2384x1303x33 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 37.4 kg | 37.4 kg | | Weight per kWp | 51.9 kg/kWp | 51.2 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 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 (-0.280 %/°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, 66HT720W:** 24,157 kWh - **Cumulative output, 66HT730W:** 24,493 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | 66HT720W | 66HT730W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 720 W | 730 W | 100.0% of rated power | | Cool, bright day | 40 °C | 690 W | 699 W | 95.8% of rated power | | Typical summer roof | 55 °C | 660 W | 669 W | 91.6% of rated power | | Hot roof | 70 °C | 629 W | 638 W | 87.4% of rated power | ## Against the whole database | Measure | 66HT720W | 66HT730W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,306 | #716 | 14,005 | 66HT730W leads by 590 places | | Power density | #1,347 | #800 | 14,005 | 66HT730W leads by 547 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #5,380 | #4,629 | 14,005 | 66HT730W leads by 751 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #330 | #196 | 14,005 | 66HT730W leads by 134 places | ## Questions ### Which panel is better: Hanersun HN21N-66HT720W or Hanersun HN21N-66HT730W? According to our database: **Hanersun HN21N-66HT**730 W**** has higher module efficiency (**23.50%** vs **23.20%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Hanersun HN21N-66HT720W and Hanersun HN21N-66HT730W? **Hanersun HN21N-66HT**720 W**** has a module efficiency of **23.20%**, while **Hanersun HN21N-66HT**730 W**** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Hanersun HN21N-66HT720W use vs Hanersun HN21N-66HT730W? **Hanersun HN21N-66HT**720 W**** uses **N-type** cells; **Hanersun HN21N-66HT**730 W**** uses **N-type**. 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 Hanersun HN21N-66HT720W and Hanersun HN21N-66HT730W? **Hanersun HN21N-66HT**720 W**** has a **30 years** power warranty; **Hanersun HN21N-66HT**730 W**** 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 Hanersun HN21N-66HT720W and Hanersun HN21N-66HT730W bifacial panels? Both **Hanersun HN21N-66HT**720 W**** and **Hanersun HN21N-66HT**730 W**** 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 - [Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT750W](https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht750w) - 7 differences, the largest is module efficiency - [Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT745W](https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht745w) - 5 differences, the largest is module efficiency - [Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT740W](https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht740w) - 4 differences, the largest is module efficiency - [Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT735W](https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht735w) - 4 differences, the largest is module efficiency - [Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT725W](https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht725w) - The same specification on paper - [Hanersun HN21N-66HT720W vs Hanersun HN21N-66HT715W](https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht715w) - One difference: module efficiency --- Source: https://comparepv.com/compare/hanersun-hn21n-66ht720w/hanersun-hn21n-66ht730w 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.