---
title: "FelicityESS vs JA Solar - Brand Comparison | ComparePV"
description: "Compare FelicityESS vs JA Solar solar panels: full portfolio, efficiency, cell technology breakdown, warranty terms and company background."
source: "https://comparepv.com/felicityess-vs-ja-solar"
---

# FelicityESS vs JA Solar

JA Solar has the broader catalog (504 vs 0 models). JA Solar leans bifacial (47% of lineup).


## The two companies


| Attribute | FelicityESS | JA Solar |
| --- | --- | --- |
| Country | China | China |
| Headquarters | Guangzhou | Beijing |
| Founded | 2007 | 2005 |
| Employees | 500-1000 | 37,289 |
| Annual capacity |  | 100+ GW/year |
| Tier 1 |  | yes |
| Listed |  | SZSE: 002459 |
| Website | [https://www.felicityess.com](https://www.felicityess.com) | [https://www.jasolar.com](https://www.jasolar.com) |

FelicityESS (Guangdong Felicity New Energy Co., Ltd.) is a Chinese manufacturer of energy storage systems, hybrid inverters, and EV charging equipment with 17+ years of experience in the photovoltaic energy sector. The company targets the mid-to-high-end residential and commercial ESS market in Europe, North America...

JA Solar is a global leader in the manufacturing of high-performance photovoltaic products. Founded in 2005, the company designs, develops, manufactures, and sells solar cells and modules. JA Solar's products are used in ground-mounted power plants, commercial & industrial rooftop PV systems, and residential rooftop...


## Catalog & Power


| Measure | FelicityESS | JA Solar | Margin |
| --- | --- | --- | --- |
| Panel Models | 0 | 504 | +504 |
| Max Power | 0 W | 740 W | +740 W |
| Avg Power | 0 W | 456 W | +456 W |


## Efficiency


| Measure | FelicityESS | JA Solar | Margin |
| --- | --- | --- | --- |
| Max Efficiency | - | 24.80% |  |
| Avg Efficiency | - | 21.13% |  |


## Reliability & Warranty


| Measure | FelicityESS | JA Solar | Margin |
| --- | --- | --- | --- |
| Avg Temp Coefficient | - | -0.322%/°C |  |
| Bifacial Share | 0 (0%) | 238 (47%) | +47 pp |
| Avg Warranty | - | 27.9 yrs |  |


## Efficiency distribution

JA Solar skews to higher efficiency: 15% of lineup is 23%+


| Efficiency band | FelicityESS | JA Solar |
| --- | --- | --- |
| \<20% | 0 | 112 (22.2%) |
| 20-21% | 0 | 99 (19.6%) |
| 21-22% | 0 | 112 (22.2%) |
| 22-23% | 0 | 107 (21.2%) |
| 23%+ | 0 | 74 (14.7%) |


## Power distribution

JA Solar offers more 600W+ panels (14% of lineup)


| Power band | FelicityESS | JA Solar |
| --- | --- | --- |
| \<400W | 0 | 142 (28.2%) |
| 400-499W | 0 | 173 (34.3%) |
| 500-599W | 0 | 120 (23.8%) |
| 600-699W | 0 | 60 (11.9%) |
| 700W+ | 0 | 9 (1.8%) |


## Cell technology

Dominant cell tech: **PERC** (49%)


| Technology | FelicityESS | JA Solar |
| --- | --- | --- |
| PERC | 0 | 247 (49.0%) |
| TOPCon | 0 | 146 (29.0%) |
| N-type | 0 | 90 (17.9%) |
| Unknown | 0 | 16 (3.2%) |
| HJT | 0 | 5 (1.0%) |


## Top panels, JA Solar


| # | Model | Power | Efficiency | Temp. coefficient | Technology |
| --- | --- | --- | --- | --- | --- |
| 1 | [JAM66D46-740/LB](https://comparepv.com/panel/ja-solar-jam66d46-740-lb) | 740 | 23.8 | -0.290 | Monocrystalline |
| 2 | [JAM66D46-735/LB](https://comparepv.com/panel/ja-solar-jam66d46-735-lb) | 735 | 23.7 | -0.290 | Monocrystalline |
| 3 | [JAM66D46-730/LB](https://comparepv.com/panel/ja-solar-jam66d46-730-lb) | 730 | 23.5 | -0.290 | Monocrystalline |
| 4 | [JAM66D46-725/LB](https://comparepv.com/panel/ja-solar-jam66d46-725-lb) | 725 | 23.3 | -0.290 | Monocrystalline |
| 5 | [JAM66D46-720/LB](https://comparepv.com/panel/ja-solar-jam66d46-720-lb) | 720 | 23.2 | -0.290 | Monocrystalline |
| 6 | [JAM66D46-715/LB](https://comparepv.com/panel/ja-solar-jam66d46-715-lb) | 715 | 23.0 | -0.290 | Monocrystalline |
| 7 | [JAM66D46-710/LB](https://comparepv.com/panel/ja-solar-jam66d46-710-lb) | 710 | 22.9 | -0.290 | Monocrystalline |
| 8 | [JAM66D46-705/LB](https://comparepv.com/panel/ja-solar-jam66d46-705-lb) | 705 | 22.7 | -0.290 | Monocrystalline |
| 9 | [JAM66D46-700/LB](https://comparepv.com/panel/ja-solar-jam66d46-700-lb) | 700 | 22.5 | -0.290 | Monocrystalline |
| 10 | [JAM66D46-695/LB](https://comparepv.com/panel/ja-solar-jam66d46-695-lb) | 695 | 22.4 | -0.290 | Monocrystalline |


## Summary

FelicityESS and JA Solar are both Chinese companies operating in the renewable energy sector, but they occupy fundamentally different market niches. FelicityESS, founded in 2007 and employing between 500 and 1,000 people, is primarily an energy storage company focused on LiFePO4 batteries, hybrid inverters, and off-grid power solutions. The FelicityESS brand in its current form has been active since 2022, and the company carries no solar panel portfolio in industry databases - making it a storage and balance-of-system supplier rather than a module manufacturer. JA Solar, founded in 2005, is one of the world's largest solar panel manufacturers, with a workforce of over 37,000 employees, annual production capacity exceeding 100 GW, and a listing on the Shenzhen Stock Exchange. It holds Tier-1 bankable status, reflecting its financial stability and the confidence of project financiers and insurers globally. JA Solar ships to markets across Europe, Asia, the Americas, and MENA, and consistently ranks among the top two or three global module suppliers by annual shipment volume.

JA Solar's panel portfolio spans 524 models with a maximum rated power of 740 Wp, an average module power of approximately 442 Wp, and a maximum efficiency of 24.4% against an average of around 20.9%. The dominant cell technology is PERC at roughly 52% of the portfolio, with a growing share of n-type TOPCon modules in the DeepBlue 4.0 and 4.0 Pro series targeting higher-efficiency applications. Around 44% of the portfolio is bifacial, making JA Solar a strong option for utility-scale ground-mount projects where rear-side gain is commercially significant. Average product warranty stands at nearly 28 years. JA Solar has earned Top Performer status from PVEL for the tenth consecutive time in 2025, confirming long-term reliability in field conditions. FelicityESS, by contrast, is best evaluated as a storage partner - its modular LiFePO4 battery systems and hybrid inverters are suited to residential energy storage, small commercial installations, and off-grid applications in markets with limited grid access.

For international buyers choosing between the two, a direct panel-to-panel comparison is not applicable since FelicityESS does not manufacture solar modules. Buyers seeking high-volume, bankable solar panels for residential rooftop, commercial C&I, or utility-scale ground-mount projects should evaluate JA Solar on its own merits - it offers a broad, well-certified portfolio at competitive mid-market pricing with strong third-party validation. FelicityESS becomes relevant only when the procurement scope includes battery storage or inverter hardware, and buyers in that segment should weigh its more limited scale and mixed after-sales service track record against alternative storage providers.

Written by claude-sonnet from the figures above.


## Other comparisons

- [FelicityESS vs A.B. Energy](https://comparepv.com/felicityess-vs-a-b-energy)
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- [AIKO vs JA Solar](https://comparepv.com/aiko-vs-ja-solar)
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- [ARTsolar vs JA Solar](https://comparepv.com/artsolar-vs-ja-solar)


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Source: https://comparepv.com/felicityess-vs-ja-solar