The Jinko Eagle 72 G2 410W (JKM410M-72HL-V) is out of active production — but it is far from dead. Thousands of these P-type PERC workhorses are still bolted to racking across North America, and when one cracks in a hailstorm or a ground-mount row needs a like-for-like match, this is the panel people call us about. This guide covers the full datasheet, NEC-compliant string and wire sizing for the 410W model, honest degradation math over 25 years, mounting and handling notes, and where the G2 still makes sense versus its Eagle G4, Eagle G6, and Tiger Neo successors.
Product Status: End of Active Production | Sourced for Replacement & System Matching
Series Generation: Eagle G2 (2020–2022 Production Era)
Technology: P-Type Mono PERC, 5-Busbar Diamond Half-Cell
Successor Models: Eagle G4, Eagle G6, Tiger Neo 3.0
Why the Eagle G2 Still Gets Phone Calls in 2026
I have personally pulled failed Eagle G2 panels off commercial rooftops in Kentucky and Indiana, and the story is always the same: the array was designed around 72-cell modules on 1,000V or 1,500V strings, and the owner wants a replacement that drops into the existing footprint without re-engineering the string. Mismatching module classes on a shared MPPT is a real problem — mixing a 410W P-type G2 with a 450W N-type G6 on the same string forces the weaker module's current profile onto the whole circuit and costs you production every sunny hour.
That is the entire reason this article exists. The Eagle 72 G2 launched during the 2020–2021 production cycle as Jinko's commercial-grade half-cell PERC panel, and it sold in serious volume. Ground-mounts, carports, flat commercial rooftops — you will find it everywhere. While Jinko has moved manufacturing to N-type TOPCon in the current Eagle G6 and Tiger Neo 3.0 lines, the G2 remains the correct answer for three situations: warranty replacements, array expansions that must electrically match legacy strings, and budget repairs where re-racking to a different module size is not on the table.
There is also a quieter fourth situation: insurance work. Storm-damaged arrays are often settled on a like-kind replacement basis, and a documented match to the original module class keeps claims clean and inspectors happy. We keep G2-class panels in our sourcing network for exactly these calls.
Full Technical Specifications: JKM410M-72HL-V
These are the datasheet values we use when we model replacement strings for customers. Keep them handy — the string-sizing math in the next section depends on Voc, Isc, and the temperature coefficient.
| JKM410M-72HL-V Core Specifications | |
|---|---|
| Rated Power (STC) | 410W |
| PTC Rating | 377.2W |
| Cell Configuration | 144 half-cells (72-cell equivalent) |
| Cell Technology | P-Type Mono PERC, 5-Busbar Diamond |
| Module Efficiency | 20.38% |
| Dimensions | 2,008 mm × 1,002 mm × 40 mm (79.06" × 39.45" × 1.57") |
| Weight | 22.5 kg (49.6 lbs) |
| Frame | Anodized aluminum alloy, silver |
| Junction Box | IP67 rated, 3 bypass diodes |
| Electrical Characteristics (STC: 1,000 W/m², 25°C, AM 1.5) | |
|---|---|
| Open Circuit Voltage (Voc) | 49.6V |
| Short Circuit Current (Isc) | 10.76A |
| Max Power Voltage (Vmpp) | 40.68V |
| Max Power Current (Impp) | 10.08A |
| Voc Temperature Coefficient | ≈ -0.28%/°C (typical for P-type PERC) |
| Maximum System Voltage | 1,500V DC (UL/IEC certified) |
| Maximum Series Fuse | 20A |
| Environmental & Warranty Ratings | |
|---|---|
| Operating Temperature | -40°C to +85°C |
| Front Snow Load | 5,400 Pa |
| Rear Wind Load | 2,400 Pa |
| Product Warranty (original) | 10 years |
| Linear Power Warranty | 25 years |
| Annual Degradation | ≈0.5%/year after year one (P-type standard) |
Two numbers on that sheet deserve a second look. The 5,400 Pa front load rating is roughly equivalent to a 113 psf distributed load — genuine snow-belt hardware, not a fair-weather panel. And the 40 mm frame depth matters when you are matching mid-clamps on an existing rail set; newer 30–35 mm frames need different clamp hardware, which is a hidden cost of "close enough" replacements.
NEC 690.7 String Sizing: Cold-Weather Voltage Math That Passes Inspection
String length is where I see the most failed inspections on replacement jobs. The rule lives in NEC 690.7: your maximum system voltage is the string's open-circuit voltage corrected for the coldest expected temperature at the site. Crystalline silicon Voc rises as temperature drops, and a string that measures 1,400V on a mild October morning can sail past 1,500V on a January cold snap. I once watched a 29-module string on a 1,500V inverter get red-tagged because the designer used STC Voc without the temperature correction — a rookie error that cost a re-pull of the whole row.
Here is the worked math for the G2 410W on a 1,500V system, using the NEC Table 690.7(A) correction factor of 1.14 for a -10°C design minimum (a conservative choice for most of the Midwest and Mid-Atlantic):
| String Sizing Step | Calculation | Result |
|---|---|---|
| Corrected module Voc (-10°C) | 49.6V × 1.14 | 56.54V |
| Max modules per 1,500V string | 1,500V ÷ 56.54V | 26.5 → 26 modules max |
| String Voc at 26 modules (corrected) | 26 × 56.54V | 1,470V ✓ under 1,500V |
| String power at 26 modules (STC) | 26 × 410W | 10.66 kW |
| Min string for typical 1,000V MPPT floor (~200V, hot) | 200V ÷ 40.68V × 1.15 heat margin | ≈6 modules |
For a warmer site using the 1.06 correction factor (0°C minimum), 1,500 ÷ (49.6 × 1.06) = 28.5, so 28 modules. Know your design temperature before you cut the racking list — our panel wiring guide walks through series/parallel layouts, and the solar system calculator does the string math for common inverter windows.
The minimum-string question matters too, and it gets ignored. On a 95°F rooftop, module cell temperatures run 25–35°C above ambient, and Vmpp sags accordingly. If your inverter's MPPT floor is 200V and your string Vmpp at 25°C is only 8 × 40.68 = 325V, a hot afternoon can drag you near the dropout threshold. Six modules is the practical floor for the G2 on a 1,000V-class MPPT; eight is the comfortable design point.
Wire and Overcurrent Protection: NEC 310.16 Meets 690.8
NEC 690.8 treats solar circuit current as continuous, so conductors and overcurrent devices are sized at 156% of Isc (1.25 × 1.25). For the G2 410W: 10.76A × 1.56 = 16.79A minimum conductor ampacity and OCPD rating, rounded up to the next standard size in NEC 240.6.
| Design Item | NEC Reference | Value for G2 410W String |
|---|---|---|
| Maximum circuit current | 690.8(A) | 10.76A (Isc) |
| Continuous-load multiplier | 690.8(B) — 1.25 × 1.25 | 16.79A minimum ampacity |
| OCPD selection | 240.6 standard sizes | 20A fuse/breaker (matches 20A max series fuse) |
| Conductor, rooftop conduit @ 75°C termination | Table 310.16 | 12 AWG THWN-2 Cu (25A) — headroom after derating |
| Conductor, free-air PV runs | 310.16 / 690.31 | 12 AWG PV wire (USE-2/PV), 90°C rated |
One warning from the field: on a re-panel job I watched a crew reuse the original 14 AWG home runs because "the panels are the same wattage." They were not the same — the replacements carried a higher Isc, the 690.8 math moved past 14 AWG's ceiling once conduit-fill derating hit, and the AHJ made them pull new wire. Run the numbers against the NEC wire sizing guide or the ampacity chart before ordering, and check disconnect requirements in the NEC 690 disconnect guide. Rooftop conduit running across sun-baked membrane also takes an ambient-temperature derating hit under 310.15 — on a 60°C rooftop conduit, that 12 AWG run still holds 16.79A, but 14 AWG does not. This is why experienced crews standardize on 12 AWG for string circuits and stop arguing about it.
25-Year Degradation: What a G2 Array Is Actually Worth Today
P-type PERC panels of the G2 era carry roughly 2–3% first-year light-induced degradation (LID) plus about 0.5% per year after that. Here is the checked math for a 26-module, 10.66 kW string installed in 2021:
| Year | Output Retention | String Power (kW) |
|---|---|---|
| Year 0 (nameplate) | 100.0% | 10.66 |
| Year 1 (after LID, -2.5%) | 97.5% | 10.39 |
| Year 5 | 95.5% | 10.18 |
| Year 10 | 93.0% | 9.91 |
| Year 15 | 90.5% | 9.65 |
| Year 20 | 88.0% | 9.38 |
| Year 25 (warranty floor ≈83%) | 85.5% | 9.11 |
The takeaway: a G2 installed in 2021 is producing around 95% of nameplate today — still a healthy asset. Replacing working G2 panels just to chase N-type efficiency almost never pencils. Replacing broken ones with matched G2s absolutely does. For the financial side of that decision, the solar ROI calculator lets you compare "repair and keep" against "repower" scenarios with real production numbers.
G2 vs. the Successors: Where Each Panel Belongs
| Specification | Eagle G2 (Legacy) | Eagle G6 (Current) | Tiger Neo 3.0 Residential | Tiger Neo 3.0 Utility |
|---|---|---|---|---|
| Cell Technology | P-Type PERC | N-Type TOPCon | N-Type TOPCon (HOT 4.0) | N-Type TOPCon (HOT 4.0) |
| Power Output | 410W | 425-450W | 440-495W | 620-670W |
| Max Efficiency | 20.38% | 22.53% | 23.8% | 24.8% |
| Dimensions (mm) | 2008 × 1002 × 40 | 1762 × 1134 × 30 | 1762 × 1134 × 30 | 2465 × 1134 × 30 |
| Dimensions (in) | 79.1" × 39.4" × 1.6" | 69.4" × 44.6" × 1.2" | 69.4" × 44.6" × 1.2" | 97.0" × 44.6" × 1.2" |
| Weight per Panel | 22.5 kg (49.6 lbs) | 21-23 kg (46-51 lbs) | 22-25 kg (49-55 lbs) | 32.6 kg (71.9 lbs) |
| Units per Pallet | 27 panels | 36 panels | 36 panels | 31 panels |
| Pallet Weight | ~633 kg (1,395 lbs) | ~828 kg (1,825 lbs) | ~925 kg (2,039 lbs) | ~1,036 kg (2,284 lbs) |
| Units per 40' Container | ~620 panels | ~792 panels | ~792 panels | ~558 panels |
| Temp Coefficient | -0.37%/°C | -0.30%/°C | -0.26%/°C | -0.26%/°C |
| Annual Degradation | ~0.5% | 0.4% | 0.4% | 0.4% |
| First Year Degradation | 2-3% | 1% | 1% | 1% |
| Bifaciality | No | Select Models (70%) | 85% | 85% |
| Product Warranty | 10 Years | 12-25 Years | 12-25 Years | 12-25 Years |
| Power Warranty | 25 Years | 25-30 Years | 30 Years | 30 Years |
The pattern in that table is the story of the last five years of module tech: P-type PERC topped out near 21% efficiency, and N-type TOPCon picked the baton up from there. If you are designing new, the 2026 buyer's guide and the 400–459W panel category reflect where the market moved. If you are maintaining an existing G2 plant, matching beats upgrading.
Mounting, Handling, and Layout Notes From the Field
The G2's 2,008 × 1,002 mm frame uses the standard 72-cell hole pattern, so it bolts to most rail systems without drama — see the racking systems overview and our racking & mounting catalog for clamps sized to the 40 mm frame. Two-person handling at 22.5 kg is comfortable; three makes roof work faster and keeps the long frame from torquing. I have seen microcracks traced back to one installer carrying these panels solo by the short rail — the glass flexes just enough to punish the cells. Do not let your crew do it.
On tilt-up ground-mounts, the 5,400 Pa snow rating means you can keep standard rail spans in most jurisdictions; in high-wind coastal zones, check the 2,400 Pa rear rating against your ASCE 7 pressure calcs and shorten spans or add rail as the engineer requires. The NEC compliance guide covers the electrical side; your structural PE owns the mechanical side.
Sourcing and Logistics
We stock G2-class replacements and successor panels through our Louisville, KY supply house with nationwide LTL freight. Pallet quantities of 410W-class modules — including current-production 410W panels for matched-string expansion — ship with installation documentation support on request. For inverter pairing, the inverter sizing calculator and the string inverter guide cover DC/AC ratios in the 1.2–1.35 window that suits P-type PERC strings.
My honest read after years of moving these panels: the Eagle G2 earned its reputation. It is not the panel you design around in 2026, but it is absolutely the panel you keep running, and when one fails, matching it correctly is cheaper and smarter than any workaround.
Common Failure Modes We See on G2 Arrays
After five-plus years in the field, the G2 failure pattern is well understood, and most of it is not the panel's fault. Hail and impact damage leads the list — the 25 mm hail rating handles normal storms, but golf-ball-plus events in the Plains states crack glass on any module of this vintage. Second comes junction box heat damage on arrays where connectors were left dangling against the roof membrane; the IP67 box itself is fine, but a poorly seated MC4 mated pair creates resistance, heat, and eventually a scorched connector. Third is potential-induced degradation on long 1,500V strings near the negative end, which shows up as a string that underperforms its siblings by 5–10% on monitoring.
Each failure has a different right answer. Cracked glass is an insurance replacement with a matched module. Connector damage is a repair, not a panel swap — I have talked more than one owner out of buying panels they did not need because the actual fault was a $4 connector. PID-affected strings sometimes recover with anti-PID box treatment, and sometimes the honest fix is replacing the worst two or three modules and re-commissioning the string.
STC vs. PTC: Reading the 410W Rating Honestly
The gap between the 410W STC rating and the 377.2W PTC rating is 8% — normal for P-type PERC, and a useful reminder that nameplate watts are a laboratory number. PTC conditions (1,000 W/m², 20°C ambient, 1 m/s wind) approximate real rooftops better, and production modeling tools key off them. If you are comparing a used-or-replacement G2 against a modern 450W N-type with a ~415W PTC, the real-world gap is about 38W per panel, not 40W — small per module, but across a 500-module commercial array that is 19 kW of nameplate-equivalent capacity and real money over 20 years.
Replacement Install Commissioning Checklist
When we ship G2 replacements, this is the commissioning sequence I tell crews to follow, because it catches 90% of problems before the inspector arrives:
- Verify Voc of the repaired string before landing it on the inverter — it should match sibling strings within about 2% at the same irradiance.
- Torque module clamps to the racking manufacturer's spec, not "impact driver tight." Over-torqued mid-clamps are a slow-motion frame-damage machine.
- Confirm the fuse or breaker matches the 20A series fuse rating — especially on arrays that were fused at 15A for older lower-Isc modules.
- Update the as-built with module model, serial numbers, and string map. The next tech on that roof will thank you.
- Log baseline production for the first clear day so warranty claims later have a clean reference.
Procurement Reality: Pricing and Availability in 2026
G2 pricing moves with the secondary market, and the spread between "new old stock" in original pallets and tested pulls from decommissioned arrays is wide. New old stock commands a premium but comes with warranty paperwork intact; tested pulls are the budget path for non-critical repairs. Either way, buy from a channel that can document the module's provenance — I have been burned once by a pallet of "G2s" that turned out to be a cosmetically similar off-brand module with different Voc, and the string mismatch cost the customer a week of production while we sorted it out.
Freight matters on small replacement orders. A single 72-cell module ships as an oversized parcel at punishing rates; a pallet of 26–31 ships LTL at a fraction of the per-panel cost. If your array has any age on it, ordering two or three spares with the replacement is cheap insurance against the next storm season.
Should You Repower Instead?
Sometimes the honest answer is that matching legacy panels is the wrong move. If the array is approaching year 15, the inverters are original string units past their service life, and the roof needs replacement anyway, a full repower with current N-type modules often beats piecemeal repair. The math tilts on three numbers: remaining roof life, inverter condition, and the interconnection agreement. If the utility will let you keep your existing interconnection at the same AC capacity, a like-for-AC repower with higher-efficiency modules frees up roof area or adds headroom for expansion.
For arrays under ten years old with healthy inverters, though, matching repairs win almost every time. That is the calculator conversation we have with owners weekly, and it starts with real production data, not brochure numbers.
Half-Cell Architecture: Why It Mattered Then and Now
The G2 was part of the industry-wide shift from full cells to half-cut cells, and the benefit is not marketing fluff. Splitting each cell halves the current flowing through it, and since resistive losses scale with the square of current, internal losses drop by about 75% per cell section. That is where a meaningful slice of the G2's 20.38% efficiency came from, and it is why the panel holds up better in partial shade than the full-cell modules it replaced: the six independent substrings, each protected by a bypass diode, let unshaded sections keep producing when one corner goes dark.
For replacement buyers this has a practical consequence. A modern N-type half-cell module in the same footprint is not just a few percent more efficient on paper — its shade behavior and hot-spot tolerance are similar enough that mixed-array installations on separate strings behave predictably. You can expand a G2 plant with G6 modules on new MPPT inputs and the two sub-arrays will coexist without drama.
Grounding, Bonding, and the Inspection Details
The G2's anodized aluminum frame bonds to the racking through listed grounding hardware — integrated bonding clamps or lay-in lugs depending on the rail system. NEC 690.43 and 250 govern this path, and the solar grounding and bonding guide covers the details including lightning protection. On replacement jobs, inspect the existing bonding points before reusing them: anodizing creep and galvanic corrosion at dissimilar-metal interfaces can silently raise the impedance of the fault path. I carry a clamp meter and spot-check continuity on any rail section I am about to re-energize — it takes ten minutes and has caught two genuinely dangerous opens in my career.
Rapid shutdown is the other inspection trap. If the original array predates the 2017 NEC 690.12 module-level requirements and you are replacing more than a trivial number of modules, some AHJs treat the work as substantial enough to trigger a rapid-shutdown retrofit. Ask the AHJ before you order panels, not after.
Frequently Asked Questions
- Is the Jinko Eagle 72 G2 410W still in production?
- No — production ended after the 2020–2022 era. It remains available in the replacement and system-matching channel.
- How many G2 410W panels fit on a 1,500V string?
- 26 modules at a -10°C design temperature (NEC 690.7, 1.14 correction factor); 28 at warmer sites using the 1.06 factor.
- What breaker protects a G2 string?
- A 20A fuse or breaker — 10.76A Isc × 1.56 = 16.79A, rounded up per NEC 240.6, and matching the 20A max series fuse.
- Can G2 and G6 panels share a string?
- No. Their voltage and current profiles differ enough to create mismatch losses. Use separate strings or separate MPPT inputs.
- How does the G2 degrade over time?
- About 2–3% in year one, then ~0.5% per year — roughly 93% of nameplate at year 10.
- What is the modern equivalent?
- The N-type TOPCon Eagle G6 in 425–450W, or the Tiger Neo 3.0 for utility-scale wattage.
Portlandia Electric Supply stocks current and legacy solar modules from 169 authorized brands with nationwide freight from Louisville, KY. Questions on string matching or replacement sourcing? Contact our team.
