Miasole FLEX-03 320

Name: Miasole FLEX-03 320
Brand: Miasole

144 cells. Power classes 290–500 W in the CEC list.

CEC listed · Oct 21, 2021UL 61730Building-integrated (BIPV)

Power class

Power (STC)320 WCEC nameplate
Efficiency≈14.5%calculated from area
%/°C Pmax−0.519CEC listing test
PTC / STC86.8%PTC 278 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 8 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
FLEX-03 290W	290 W	47.20	9.27	37.20	7.83	≈13.1%	251 W	Oct 21, 2021
FLEX-03 300W	300 W	48.00	9.21	38.10	7.89	≈13.6%	260 W	Oct 21, 2021
FLEX-03 310W	310 W	48.70	9.14	39.00	7.96	≈14.0%	269 W	Oct 21, 2021
FLEX-03 320W	320 W	49.50	9.08	40.00	8.02	≈14.5%	278 W	Oct 21, 2021
FLEX-03 470W	470 W	74.80	9.19	59.60	7.91	≈15.7%	412 W	Oct 21, 2021
FLEX-03 480W	480 W	75.60	9.15	60.50	7.95	≈16.0%	422 W	Oct 21, 2021
FLEX-03 490W	490 W	76.40	9.11	61.40	7.99	≈16.3%	430 W	Oct 21, 2021
FLEX-03 500W	500 W	77.20	9.07	62.40	8.03	≈16.7%	440 W	Oct 21, 2021

≈ efficiency = Pmax ÷ CEC-listed area 2.21 m².

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.519 %/°C
Voc coefficient β	−0.355 %/°C
Operating cell temperature	NOCT 49.1 °C

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
290 W	208.4 W	33.31 V × 6.26 A	51.8 W	89%
300 W	215.1 W	34.11 V × 6.3 A	53.5 W	89%
310 W	222.1 W	34.92 V × 6.36 A	55.2 W	89%
320 W	229.5 W	35.82 V × 6.41 A	57.1 W	89%
470 W	321.1 W	53.16 V × 6.04 A	—	—
480 W	327.6 W	53.97 V × 6.07 A	—	—
490 W	334.1 W	54.77 V × 6.1 A	—	—
500 W	341.3 W	55.66 V × 6.13 A	—	—

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

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	536	11,799	6.08
Palmdale	1,835	587	12,918	6.69
Chula Vista	1,696	543	11,940	6.11
Huntington Beach	1,643	526	11,567	5.89
Riverside	1,696	543	11,940	6.21
Santa Clarita	1,724	552	12,137	6.28

PVWatts models a standard roof-mounted module; integrated roof products are not modeled separately.

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

Questions & answers

How efficient is the Miasole FLEX-03 320?

Calculated from the panel area (2.61 m²): about 14.5% for the 320 W class. 320 W over 2.61 m² equals about 123 W per square meter.

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

PVWatts v8 with typical-year weather gives about 536 kWh per year per 320 W panel in Los Angeles and about 587 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.519 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 26.9% below the STC rating.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List (snapshot Oct 7, 2026).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).