JA Solar is a Chinese panel maker. Its DeepBlue 4.0 modules for Australia are n-type bifacial double-glass panels from 410 to 435 W, up to 22.3% efficiency, with a 25-year product warranty that applies to Australian residential rooftops.
JA Solar DeepBlue 4.0: specs and warranty
| Spec | Value | Source |
|---|---|---|
| Category | Solar panel | n/a |
| Headquarters | China | n/a |
| Series | DeepBlue 4.0 JAM54D40 (410 to 435 W), n-type bifacial double glass | JA Solar, DeepBlue 4.0 Australian datasheet (2023) |
| Max module efficiency | 22.3% (435 W) | JA Solar, DeepBlue 4.0 Australian datasheet (2023) |
| Product warranty | 25 years, residential rooftops in Australia only | JA Solar, DeepBlue 4.0 Australian datasheet (2023) |
| Performance warranty | 30 years linear, 87.4% at year 30 | JA Solar, DeepBlue 4.0 Australian datasheet (2023) |
| Rated degradation | 1% in year one, then 0.4% a year | JA Solar, DeepBlue 4.0 Australian datasheet (2023) |
What sets the price of a system with JA Solar panels?
Installers quote JA Solar panels as part of a whole system, so there is no stand-alone price we can source. System size, roof type, switchboard work and the federal STC rebate move the price far more than the brand. Our solar price guide covers installed cost by system size, and the STC rebate guide shows what comes off it in your zone.
Key features
- n-type bifacial double-glass modules, up to 22.3% efficiency (435 W)
- 25-year product warranty for residential rooftops in Australia
- 30-year linear power warranty, 87.4% at year 30
Things to check before you buy
- The 25-year product term is an Australian residential concession; JA's global datasheets list a shorter product warranty
- The newest Australian datasheet we could find is from 2023, so check the wattage and efficiency of the exact model you're quoted
Who it suits
Residential rooftops where a 25-year product warranty and a bifacial double-glass build are on the checklist.
Other panel brands we cover
| Brand | Max efficiency | Warranty |
|---|---|---|
| Trina Solar | 23.0% (460 W) | 25-year product · 30-year performance |
| REC | 23.3% (485 W) | 20-year product · 25-year performance (25-year product with REC ProTrust) |
| Jinko Solar | 22.02% (440 W) | 25-year product · 30-year performance (all-black Tiger Neo 54HL4R-B) |
| Hanwha Q.Cells | n/a | No longer sold in Australia (warranties honoured, support via Zeco) |
| SunPower Maxeon | 22.7% (430 W) | 40-year product · 40-year performance (Maxeon Partner install; 25/25 standard) |
| Aiko | 22.1% (NEOSTAR 440 W) | 25-year product · 30-year performance |
Common questions about JA Solar
How much do JA Solar solar panels cost?
We have no sourced price for JA Solar panels on their own. Installers quote the whole system, and its size, your roof and your switchboard move the price more than the brand does. Our solar price guide covers installed cost by system size.
What warranty does JA Solar give?
25-year product · 30-year performance (Australian residential rooftops) (JA Solar, DeepBlue 4.0 Australian datasheet (2023), checked 10 October 2026). Read the warranty document for the exact model you're quoted: conditions such as registration, cycles or capacity retention vary.
How efficient are JA Solar panels?
Up to 22.3% (435 W) for the DeepBlue 4.0 JAM54D40 (410 to 435 W), n-type bifacial double glass range, from the manufacturer's datasheet (checked 10 October 2026). Efficiency mostly matters on a small roof: it changes how many kW fit, not what each kW produces.
Where is JA Solar based?
JA Solar is headquartered in China. Ask your installer where the stock they're quoting was made, as manufacturing locations vary by product line.
Want JA Solar DeepBlue 4.0 on your roof?
We pass your details to one SAA-accredited installer who can quote JA Solar where it's available in your area. The 30-second check confirms your postcode and rebates first, and the installer quotes the exact model for your home.