---
title: "Hyundai HiS-T640NJ vs Hyundai HiT-H450LE-FB(ZB) - Solar Panel Comparison | ComparePV"
description: "Compare Hyundai HiS-T640NJ vs Hyundai HiT-H450LE-FB(ZB) side by side: what actually differs, output when it is hot, thirty-year production, and the full specification."
source: "https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hyundai-hit-h450le-fb-zb"
updated: 2026-09-11
---

# Hyundai HiS-T640NJ vs Hyundai HiT-H450LE-FB(ZB)

HiT-H450LE-FB(ZB) leads on the differences that matter

The largest is temperature coefficient: 0.050 %/°C better in heat. 3 of 19 comparable parameters are identical.


## The two panels


| Attribute | A | B |
| --- | --- | --- |
| Panel | [Hyundai HiS-T640NJ](https://comparepv.com/panel/hd-hyundai-energy-solutions-his-t640nj) | [Hyundai HiT-H450LE-FB(ZB)](https://comparepv.com/panel/hyundai-hit-h450le-fb-zb) |
| Manufacturer | Hyundai | Hyundai |
| Power | 640 Wp | 450 Wp |
| Efficiency | 22.90 % | 22.50 % |
| Technology | TOPCon | HJT |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | HiS-T640NJ | HiT-H450LE-FB(ZB) | Difference |
| --- | --- | --- | --- |
| Temperature coefficient | -0.290 %/°C | -0.240 %/°C | +0.050 %/°C for HiT-H450LE-FB(ZB) |
| Rated power | 640 Wp | 450 Wp | +190 W for HiS-T640NJ |
| Weight | 34.7 kg | 21.6 kg | -13.1 kg for HiT-H450LE-FB(ZB) |
| Product warranty | 12 yrs | 30 yrs | +18 yrs for HiT-H450LE-FB(ZB) |
| Module efficiency | 22.90 % | 22.50 % | +0.40 pp for HiS-T640NJ |
| Weight per kWp | 54.2 kg/kWp | 48.0 kg/kWp | -6.2 kg/kWp for HiT-H450LE-FB(ZB) |
| Annual degradation | 0.40 %/yr | 0.30 %/yr | -0.10 %/yr for HiT-H450LE-FB(ZB) |
| Open-circuit voltage | 57.77 V | 36.72 V | 21.05 V apart |
| Module area | 2.795 m² | 1.998 m² | 0.797 m² apart |
| Short-circuit current | 14.06 A | 15.53 A | 1.47 A apart |
| Cell technology | TOPCon | HJT | TOPCon vs HJT |
| Power density | 229.0 Wp/m² | 225.2 Wp/m² | +3.7 Wp/m² for HiS-T640NJ |
| Voltage at max power | 47.74 V | 30.83 V | 16.91 V apart |
| Cell count | 156 | 96 | 60 cells apart |
| Current at max power | 13.41 A | 14.60 A | 1.19 A apart |
| Dimensions | 2465x1134x30 mm | 1762x1134x30 mm | 2465x1134x30 mm vs 1762x1134x30 mm |


## Every compared parameter


| Parameter | HiS-T640NJ | HiT-H450LE-FB(ZB) |
| --- | --- | --- |
| Rated power | 640 Wp | 450 Wp |
| Module efficiency | 22.90 % | 22.50 % |
| Power density | 229.0 Wp/m² | 225.2 Wp/m² |
| Open-circuit voltage | 57.77 V | 36.72 V |
| Voltage at max power | 47.74 V | 30.83 V |
| Short-circuit current | 14.06 A | 15.53 A |
| Current at max power | 13.41 A | 14.60 A |
| Temperature coefficient | -0.290 %/°C | -0.240 %/°C |
| Dimensions | 2465x1134x30 mm | 1762x1134x30 mm |
| Module area | 2.795 m² | 1.998 m² |
| Weight | 34.7 kg | 21.6 kg |
| Weight per kWp | 54.2 kg/kWp | 48.0 kg/kWp |
| Product warranty | 12 yrs | 30 yrs |
| Performance warranty | 30 yrs | 30 yrs |
| Annual degradation | 0.40 %/yr | 0.30 %/yr |
| Cell technology | TOPCon | HJT |
| Cell type | Monocrystalline | Monocrystalline |
| Cell count | 156 | 96 |
| Bifacial | Yes | Yes |


## Thirty-year yield

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

- **Cumulative output, HiS-T640NJ:** 21,473 kWh
- **Cumulative output, HiT-H450LE-FB(ZB):** 15,333 kWh
- **Gap:** 6,140 kWh


## Output when hot


| Condition | Cell temperature | HiS-T640NJ | HiT-H450LE-FB(ZB) | Retained |
| --- | --- | --- | --- | --- |
| Standard test conditions | 25 °C | 640 W | 450 W | 100.0% of rated power |
| Cool, bright day | 40 °C | 612 W | 434 W | 95.7% of rated power |
| Typical summer roof | 55 °C | 584 W | 418 W | 91.3% of rated power |
| Hot roof | 70 °C | 556 W | 401 W | 87.0% of rated power |


## Against the whole database


| Measure | HiS-T640NJ | HiT-H450LE-FB(ZB) | Out of | Note |
| --- | --- | --- | --- | --- |
| Efficiency | #2,359 | #4,222 | 14,005 | HiS-T640NJ leads by 1,863 places |
| Power density | #2,389 | #4,225 | 14,005 | HiS-T640NJ leads by 1,836 places |
| Heat behaviour | #2,165 | #13 | 14,005 | HiT-H450LE-FB(ZB) leads by 2,152 places |
| Weight | #8,447 | #2,004 | 14,005 | HiT-H450LE-FB(ZB) leads by 6,443 places |
| Warranty | #21 | #21 | 14,005 | Tied - the same position in the database |
| Overall | #2,090 | #5,058 | 14,005 | HiS-T640NJ leads by 2,968 places |


## Questions


### Which panel is better: Hyundai HiS-T640NJ or Hyundai HiT-H450LE-FB(ZB)?

According to our database: **Hyundai HiS-T640NJ** has higher module efficiency (**22.90%** vs **22.50%**); **Hyundai HiT-H450LE-FB(ZB)** tolerates heat better (temp coeff **-0.240%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture.


### What is the efficiency of Hyundai HiS-T640NJ and Hyundai HiT-H450LE-FB(ZB)?

**Hyundai HiS-T640NJ** has a module efficiency of **22.90%**, while **Hyundai HiT-H450LE-FB(ZB)** is **22.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited.


### What cell technology does Hyundai HiS-T640NJ use vs Hyundai HiT-H450LE-FB(ZB)?

**Hyundai HiS-T640NJ** uses **TOPCon** cells; **Hyundai HiT-H450LE-FB(ZB)** uses **HJT**. 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 Hyundai HiS-T640NJ and Hyundai HiT-H450LE-FB(ZB)?

**Hyundai HiS-T640NJ** has a **30 years** power warranty; **Hyundai HiT-H450LE-FB(ZB)** 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 Hyundai HiS-T640NJ and Hyundai HiT-H450LE-FB(ZB) bifacial panels?

Both **Hyundai HiS-T640NJ** and **Hyundai HiT-H450LE-FB(ZB)** 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

- [Hyundai HiS-T640NJ vs Hyundai HiS-T635NJ](https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hd-hyundai-energy-solutions-his-t635nj) - The same specification on paper
- [Hyundai HiS-T640NJ vs Hyundai HiS-T630NJ](https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hd-hyundai-energy-solutions-his-t630nj) - 3 differences, the largest is module efficiency
- [Hyundai HiT-H450LE-FB(ZB) vs Hyundai HiT-H460LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h450le-fb-zb/hyundai-hit-h460le-fb-zb) - 3 differences, the largest is module efficiency
- [Hyundai HiT-H450LE-FB(ZB) vs Hyundai HiT-H455LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h450le-fb-zb/hyundai-hit-h455le-fb-zb) - One difference: module efficiency
- [Hyundai HiT-H450LE-FB(ZB) vs Hyundai HiT-H445LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h450le-fb-zb/hyundai-hit-h445le-fb-zb) - One difference: module efficiency
- [Hyundai HiT-H450LE-FB(ZB) vs Hyundai HiT-H440LE-FB(ZB)](https://comparepv.com/compare/hyundai-hit-h450le-fb-zb/hyundai-hit-h440le-fb-zb) - 3 differences, the largest is module efficiency


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Source: https://comparepv.com/compare/hd-hyundai-energy-solutions-his-t640nj/hyundai-hit-h450le-fb-zb

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.