Illustration · 108 cells

Solar panelKOSOL ENERGIE

KOSOL ENERGIE KE590N

Name: KOSOL ENERGIE KE590N
Brand: KOSOL ENERGIE

108 cells. Power classes 420–655 W in the CEC list.

CEC listed · Apr 21, 2026UL 61730

Power class

Power (STC)590 WCEC nameplate
Efficiency≈23.0%calculated from area
%/°C Pmax−0.293CEC listing test
PTC / STC95.2%PTC 562 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 27 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
KE420N	420 W	39.40	13.42	32.70	12.84	≈21.6%	399 W	Apr 21, 2026
KE425N	425 W	39.60	13.51	32.90	12.92	≈21.9%	404 W	Apr 21, 2026
KE430N	430 W	39.70	13.60	33.10	13.00	≈22.2%	409 W	Apr 21, 2026
KE435N	435 W	39.90	13.69	33.30	13.08	≈22.4%	414 W	Apr 21, 2026
KE440N	440 W	40.00	13.78	33.40	13.16	≈22.7%	419 W	Apr 21, 2026
KE445N	445 W	40.20	13.87	33.60	13.24	≈22.9%	424 W	Apr 21, 2026
KE450N	450 W	40.30	13.96	33.80	13.32	≈23.2%	428 W	Apr 21, 2026
KE455N	455 W	40.50	14.05	34.00	13.40	≈23.5%	433 W	Apr 21, 2026
KE565N	565 W	52.10	13.48	43.70	12.93	≈22.1%	537 W	Apr 21, 2026
KE570N	570 W	52.30	13.54	43.90	12.98	≈22.3%	542 W	Apr 21, 2026
KE575N	575 W	52.50	13.60	44.10	13.03	≈22.5%	547 W	Apr 21, 2026
KE580N	580 W	52.70	13.66	44.40	13.08	≈22.7%	552 W	Apr 21, 2026
KE585N	585 W	52.90	13.72	44.60	13.13	≈22.9%	557 W	Apr 21, 2026
KE590N	590 W	53.00	13.78	44.80	13.18	≈23.0%	562 W	Apr 21, 2026
KE595N	595 W	53.20	13.84	45.00	13.23	≈23.2%	566 W	Apr 21, 2026
KE600N	600 W	53.40	13.90	45.20	13.28	≈23.4%	571 W	Apr 21, 2026
KE605N	605 W	53.60	13.96	45.40	13.33	≈23.6%	576 W	Apr 21, 2026
KE610N	610 W	53.80	14.02	45.60	13.38	≈23.8%	581 W	Apr 21, 2026
KE615N	615 W	56.20	13.65	47.30	13.01	≈22.2%	585 W	Apr 21, 2026
KE620N	620 W	56.50	13.69	47.50	13.05	≈22.4%	590 W	Apr 21, 2026
KE625N	625 W	56.70	13.73	47.80	13.09	≈22.6%	594 W	Apr 21, 2026
KE630N	630 W	56.90	13.77	48.00	13.13	≈22.7%	599 W	Apr 21, 2026
KE635N	635 W	57.10	13.81	48.20	13.17	≈22.9%	604 W	Apr 21, 2026
KE640N	640 W	57.30	13.85	48.50	13.21	≈23.1%	609 W	Apr 21, 2026
KE645N	645 W	57.60	13.89	48.70	13.25	≈23.3%	614 W	Apr 21, 2026
KE650N	650 W	57.80	13.93	48.90	13.29	≈23.5%	619 W	Apr 21, 2026
KE655N	655 W	58.00	13.97	49.10	13.33	≈23.6%	624 W	Apr 21, 2026

≈ efficiency = Pmax ÷ CEC-listed area 1.94 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.56 m² (27.6 ft²)CEC-listed area
Cells108 cells
Back coverGlass (dual-glass module)

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	CEC listing test
Pmax coefficient γ	−0.293 %/°C
Voc coefficient β	−0.225 %/°C
Isc coefficient α	+0.044 %/°C
Operating cell temperature	NOCT 43.1 °C

Vmp coefficient ≈ γ − α (CEC); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

Class	Pmax at NOCT	Vmp × Imp at NOCT	Pmax at 200 W/m²	Low-light efficiency vs STC
420 W	323.7 W	31.7 V × 10.21 A	80.1 W	95%
425 W	327.6 W	31.9 V × 10.27 A	81.1 W	95%
430 W	331.9 W	32.1 V × 10.34 A	82.2 W	96%
435 W	334.9 W	32.2 V × 10.4 A	83 W	95%
440 W	338.9 W	32.4 V × 10.46 A	84.1 W	96%
445 W	343.3 W	32.6 V × 10.53 A	84.9 W	95%
450 W	346.3 W	32.7 V × 10.59 A	86 W	96%
455 W	350.4 W	32.9 V × 10.65 A	86.8 W	95%
565 W	431.6 W	41.9 V × 10.3 A	107.7 W	95%
570 W	435.3 W	42.1 V × 10.34 A	108.6 W	95%
575 W	439.1 W	42.3 V × 10.38 A	109.6 W	95%
580 W	442.9 W	42.5 V × 10.42 A	110.5 W	95%
585 W	446.6 W	42.7 V × 10.46 A	111.5 W	95%
590 W	450.4 W	42.9 V × 10.5 A	112.5 W	95%
595 W	454.3 W	43.1 V × 10.54 A	113.4 W	95%
600 W	458.1 W	43.3 V × 10.58 A	114.4 W	95%
605 W	462 W	43.5 V × 10.62 A	115.4 W	95%
610 W	465.8 W	43.7 V × 10.66 A	116.3 W	95%
615 W	470.8 W	45.4 V × 10.37 A	115.6 W	94%
620 W	474.7 W	45.6 V × 10.41 A	116.6 W	94%
625 W	478.2 W	45.8 V × 10.44 A	117.7 W	94%
630 W	481.6 W	46 V × 10.47 A	118.7 W	94%
635 W	486.1 W	46.3 V × 10.5 A	119.3 W	94%
640 W	489.6 W	46.5 V × 10.53 A	120.4 W	94%
645 W	493.6 W	46.7 V × 10.57 A	121.4 W	94%
650 W	497.1 W	46.9 V × 10.6 A	122.4 W	94%
655 W	500.7 W	47.1 V × 10.63 A	123 W	94%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Inverter compatibility & string sizing

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · NLR PVWatts v8 · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

55.7 V

Voc when cold

per panel

37.4 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

Min panels / string

MPPT from 60 V

Defaults come from NLR TMY weather (coldest hour, hottest modeled cell). Code calculations (NEC 690.7) use the ASHRAE extreme annual minimum, which is usually colder — enter it above. β is the CEC-measured coefficient; NEC 690.7 calculations use the datasheet value.

String inverters most named in SoCal permits

Inverter	Max DC input	MPPT	Window source	Panels per string
Tesla 1538000-xx-y	600 V	60–480 V	datasheet	2–10
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–10
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–10
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–8

Microinverters (one per panel)

No microinverter in the reference set lists this power class in its recommended module power range.

Voltage check against the microinverter datasheets — confirm the pairing on the manufacturer’s module compatibility list. Rows appear only when the panel’s power is inside the microinverter’s recommended module power range.

SolarEdge and other optimizer-based systems size strings by the optimizer rules — use the manufacturer’s designer. Reference inverters: most named in SoCal permits since Oct 2024.

Expected production in Southern California

NLR PVWatts v8 · Cali-Graf calculation

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	989	11,866	6.08
Palmdale	1,835	1,083	12,992	6.69
Chula Vista	1,696	1,001	12,008	6.11
Huntington Beach	1,643	969	11,632	5.89
Riverside	1,696	1,001	12,008	6.21
Santa Clarita	1,724	1,017	12,206	6.28

Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.

Compare with similar 590 W panels

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · building permits

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
KOSOL ENERGIE KE590N	590 W	≈23%	−0.293	53	13.78	—	—
Phono Solar PS590M8GFH-24/TNH	590 W	≈23%	−0.293	53	13.78	product 2024, 2025	1
Qcells Q.PEAK DUO XL-G11S.3/BFG 590	590 W	≈21.7%	−0.348	53.6	13.74	product 2024, 2025, 2026	1
VSUN (Vietnam Sunergy) VSUN590N-144MH	590 W	≈22.9%	−0.309	52.48	13.93	brand 6× (2021–2026)	1

Same fields from the same sources for every row; ≈ efficiency is calculated from the listed area. Comparable series: other brands, same product group, power range covering this class.

Questions & answers

How efficient is the KOSOL ENERGIE KE590N?

Calculated from the panel area (2.56 m²): about 23% for the 590 W class. 590 W over 2.56 m² equals about 230 W per square meter.

How much energy does one panel produce in Los Angeles or Palmdale?

PVWatts v8 with typical-year weather gives about 989 kWh per year per 590 W panel in Los Angeles and about 1,083 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.293 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.2% below the STC rating.

How many panels fit on one string?

With the Tesla 1538000-xx-y (max DC 600 V, MPPT from 60 V, datasheet) in Los Angeles the calculator gives 2–10 panels per string (Voc at 2 °C = 55.7 V, Vmp at 74 °C cell = 37.4 V). Final design must follow the inverter manual and NEC 690.7.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Inverter datasheets — Solis (Ginlong), Tesla (manufacturer documents).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).