What is the JA Solar DeepBlue series?

DeepBlue is JA Solar's premium N-type TOPCon product line. DeepBlue 4.0 Pro comes in 580W (22.5%) and 625W (23.0%) for residential and commercial. DeepBlue 5.0 Pro 670W is bifacial dual-glass for ground-mount commercial. DeepBlue 6.0 700W is the 2026 flagship with 24.0% efficiency and 0.35%/yr degradation. All models carry 30-year performance warranties.

What is TOPCon technology in DeepBlue panels?

TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture where a thin tunnel oxide layer improves carrier passivation on the rear of the cell. This reduces recombination losses, resulting in 22.5–24.0% efficiency, -0.28 to -0.30%/°C temperature coefficient, 0.35–0.40%/yr annual degradation, and no Light-Induced Degradation (LID). N-type TOPCon panels start strong and maintain output more consistently than P-type PERC over their 30-year warranty.

Is the JA Solar DeepBlue 5.0 Pro bifacial worth it?

The DeepBlue 5.0 Pro 670W bifacial makes sense for ground-mount systems (5–15% rear gain from grass/gravel/snow), carport canopies (pavement below), and flat commercial rooftops with white TPO membrane. For conventional asphalt shingle rooftops, bifacial rear gain drops to 2–5% — rarely worth the premium. The dual-glass construction also provides better moisture resistance for humid or coastal environments.

What does JA Solar's 30-year performance warranty cover?

JA Solar's DeepBlue 30-year performance warranty guarantees at least 87.4% of rated output at year 30, following a linear schedule with no more than 2% first-year loss and 0.40%/yr thereafter. The product (workmanship) warranty is 12 years for current models. If panels underperform the guarantee at any point, JA Solar will replace or compensate — warranty follows the panels regardless of installer or ownership changes.

JA Solar DeepBlue Calculator

World's #2 panel manufacturer — select DeepBlue 4.0 Pro 580W, 625W, 5.0 Pro 670W bifacial, or 6.0 700W flagship. Get panel count, 25-year production, N-type TOPCon degradation, and 30-year warranty details for residential or commercial.

JA Solar DeepBlue model & inputs

DeepBlue model?

Application?

Target system size?

Peak sun hours (PSH)?

hrs/day

Electricity rate?

$/kWh

DeepBlue 4.0 Pro 580W (22.5%) TOPCon — Best-value residential N-type — 580W in a standard form factor, 30-yr performance warranty, $2.20–2.40/W installed

JA Solar DeepBlue results

Recommendation

Best for residential rooftops — excellent value N-type, 30-yr warranty, proven 580W format compatible with most string inverters

Residential: JA Solar Tier 1 since 2012, 30-yr performance warranty covers most 30-year mortgages.

Metric	DeepBlue 4.0 Pro 580W Mono
Panels needed	14 panels @ 580W each
Actual system size	8.12 kW
Panel efficiency	22.5%
System cost range	$17,458 – $19,894
Net cost after 30% ITC	$13,073
Year 1 production	10,670 kWh/yr
25-year total production	249,236 kWh
Efficiency at year 25	89.0%
Annual degradation	0.4%/yr (N-type TOPCon)
Annual savings	$1,921/yr
25-year savings	$44,862
Simple payback (after ITC)	6.8 years
Temperature coefficient	-0.3%/°C
Hot day output loss (35°C rise)	10.5% loss → 7.27 kW effective
Warranty	12-yr product / 30-yr performance
Manufacturer rank	World #2 solar panel manufacturer by shipment volume

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How to Use This Calculator

Select your JA Solar DeepBlue model

JA Solar's DeepBlue series is their premium N-type TOPCon product line. The DeepBlue 4.0 Pro comes in 580W and 625W configurations for residential and commercial use. The DeepBlue 5.0 Pro 670W adds bifacial dual-glass for commercial ground-mount applications. The DeepBlue 6.0 700W is JA Solar's 2026 next-generation flagship with advanced TOPCon cell architecture. All DeepBlue models use N-type cells with 0.40%/yr or better degradation and 30-year performance warranties.

Choose your application type

Application type changes the cost context shown. Residential installs (5–20 kW) typically see $2.20–2.80/W all-in installed cost. Commercial (100–5,000 kW) achieves lower $/W due to bulk procurement and less complex installation. Utility-scale (5 MW+) panel costs drop to module-only pricing with tracker and BOS costs calculated separately.

Enter system size, peak sun hours, and electricity rate

The calculator computes panel count, annual kWh, 25-year production, savings, and payback. Electricity rate drives all financial outputs — residential buyers should use retail rate; commercial/utility buyers should use avoided cost or PPA rate. JA Solar is the world's #2 panel manufacturer — panels are bankable for commercial project financing.

The Formula

Panels Needed = ⌈System kW × 1000 ÷ Panel Watts⌉ Actual System kW = Panels × Panel Watts ÷ 1000 Year 1 Production = System kW × PSH × 365 × 0.80 × bifacial bonus (1.08 if bifacial) Year N Production = Year 1 × (1 − degradation/100)^N × (1 − 0.02 first-year) 25-yr Total = Sum of Years 1–25 System Cost = System kW × 1000 × $/W (model range ±$0.15) Net Cost = System Cost × (1 − 0.30 ITC) Payback = Net Cost ÷ Annual Savings

The 0.80 derating accounts for inverter losses (~97%), wiring (~2%), mismatch (~2%), soiling (~3%), and shading (~2%). Bifacial panels receive an 8% bonus for conservative rear-side gain at a white-gravel ground-mount installation. Actual bifacial gain ranges from 2–5% (dark soil close to ground) to 15–25% (snow, concrete, elevated trackers).

Example

Carlos — 10 kW DeepBlue 4.0 Pro 580W system, Texas

Carlos is in Austin with 5.2 PSH and pays $0.19/kWh. He wants a reliable N-type panel at below-premium pricing.

Model selectedDeepBlue 4.0 Pro 580W (22.5% TOPCon)

System size10 kW

Peak sun hours5.2 hrs/day

Electricity rate$0.19/kWh

Results

Panels needed18 panels (10.44 kW actual)

System cost range$22,000 – $28,000

Net cost after ITC~$17,500

Year 1 production~15,800 kWh

25-year production~375,000 kWh

Annual savings~$3,000/yr

Simple payback~5.8 years

Year 25 efficiency~91.4% (N-type TOPCon 0.40%/yr)

The DeepBlue 4.0 Pro's $2.30/W pricing is roughly 35% cheaper than Maxeon IBC while still delivering N-type TOPCon performance with a 30-year warranty. For Carlos, the lower upfront cost results in a 5.8-year payback vs 7+ years for premium IBC — a compelling trade-off when roof space is not the binding constraint.

JA Solar DeepBlue Series Comparison

Spec	DB 4.0 Pro 580W	DB 4.0 Pro 625W	DB 5.0 Pro 670W	DB 6.0 700W
Cell type	N TOPCon	N TOPCon	N TOPCon Bifacial	N TOPCon Gen2
Efficiency	22.5%	23.0%	23.5%	24.0%
Degradation	0.40%/yr	0.40%/yr	0.40%/yr	0.35%/yr
Performance warranty	30 years	30 years	30 years	30 years
$/W (residential)	$2.15–2.45	$2.40–2.70	$2.55–2.85	$2.65–2.95

FAQ

How does JA Solar rank as a manufacturer? ▼

JA Solar is the world's #2 solar panel manufacturer by shipped gigawatts (behind JinkoSolar), having shipped over 70 GW through 2024. They have maintained Bloomberg NEF Tier 1 bankability status every quarter since 2012, are listed on the Shanghai Stock Exchange, and operate manufacturing across China, Vietnam, Malaysia, and Brazil. Their DeepBlue N-type panels have received top performer status in PVEL's Solar Module Scorecard — independent laboratory testing of long-term durability and degradation. For commercial project financing and PPAs, JA Solar panels are accepted by virtually all major project finance lenders globally.

What is TOPCon technology and why does it matter? ▼

TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture where a thin tunnel oxide layer is deposited on the rear of the cell to improve carrier passivation. This reduces recombination losses — electrons are more efficiently captured before they can recombine. The practical result: higher efficiency (22–24% vs 20–22% for PERC), lower temperature coefficient (-0.28 to -0.30%/°C vs -0.35%/°C for PERC), and lower annual degradation (0.35–0.40%/yr vs 0.50–0.55%/yr for PERC). N-type cells also have no Light-Induced Degradation (LID) — the first-year performance cliff that PERC panels experience from boron-oxygen defects. DeepBlue TOPCon panels start strong and maintain output more consistently over their 30-year warranty period.

Is the DeepBlue 5.0 Pro bifacial worth it for my install? ▼

The DeepBlue 5.0 Pro 670W bifacial dual-glass panel makes sense when: (1) it's a ground-mount system where the rear can see reflected light from grass (albedo 0.20), gravel (0.30–0.40), or snow (0.60–0.80); (2) a carport canopy where rear light comes from pavement or concrete below; or (3) a rooftop with white TPO membrane (albedo ~0.55) allowing meaningful rear gain. For conventional dark asphalt shingle rooftop installs, rear gain drops to 2–5% — rarely worth the extra cost. The dual-glass construction also provides better moisture resistance for humid environments, making it a preferred choice for coastal or tropical installations regardless of bifacial gain.

What does JA Solar's 30-year performance warranty guarantee? ▼

JA Solar's DeepBlue performance warranty guarantees at least 87.4% of rated output at year 30 — 5 years longer than the industry-standard 25-year warranty. The warranty covers output decline through a linear schedule: no more than 2% in year 1, then 0.40%/yr for years 2–30. If panels produce below this guarantee, JA Solar will replace or compensate. Importantly, the warranty is tied to the manufacturer — it follows the panels regardless of installer, distributor, or property owner changes. Note: product (workmanship) warranty is 12 years for current DeepBlue series. The 30-year term is specifically the performance (output) guarantee.

How does DeepBlue compare to JinkoSolar Tiger Neo? ▼

Both are N-type TOPCon panels from Tier 1 manufacturers and are very similar in technical specs. JinkoSolar Tiger Neo 605W at 22.7% efficiency and JA Solar DeepBlue 4.0 Pro 625W at 23.0% are essentially equivalent real-world performers. Key differentiators: Tiger Neo has a 30-year performance warranty matching JA Solar. JinkoSolar ships more volume (#1 globally) which may affect distributor availability. JA Solar's DeepBlue 5.0 Pro and 6.0 offer higher wattages at competitive pricing. In practice, choose whichever your installer can source at competitive pricing — both are excellent, bankable, and covered by equivalent warranties.

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