Illustration · 60 cells

Solar panelLumos

Lumos S60-345-13-IM

Name: Lumos S60-345-13-IM
Brand: Lumos

60 cells, bifacial, glass (dual-glass module). Power classes 340–355 W in the CEC list.

CEC listed · Sep 21, 2023UL 61730Bifacial

Power class

Power (STC)345 WCEC nameplate
Efficiency≈17.9%calculated from area
%/°C Pmax−0.370CEC listing test
PTC / STC93.2%PTC 321 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 4 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
S60-340-13-IM	340 W	40.70	11.10	32.64	10.48	≈17.6%	317 W	Sep 21, 2023
S60-345-13-IM	345 W	40.80	11.20	32.74	10.58	≈17.9%	321 W	Sep 21, 2023
S60-350-13-IM	350 W	40.90	11.30	32.84	10.68	≈18.1%	326 W	Sep 21, 2023
S60-355-13-IM	355 W	41.00	11.40	32.94	10.78	≈18.4%	331 W	Sep 21, 2023

≈ efficiency = Pmax ÷ CEC-listed area 1.93 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area1.93 m² (20.8 ft²)CEC-listed area
Cells60 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	−0.370 %/°C
Voc coefficient β	−0.324 %/°C
Isc coefficient α	+0.030 %/°C
Operating cell temperature	NOCT 43.5 °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
340 W	254.4 W	30.33 V × 8.39 A	67.3 W	99%
345 W	257.7 W	30.43 V × 8.47 A	68.1 W	99%
350 W	260.9 W	30.52 V × 8.55 A	69 W	99%
355 W	264.1 W	30.61 V × 8.63 A	69.8 W	98%

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

43.8 V

Voc when cold

per panel

26.3 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	3–13
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	4–13
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–13
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	9–11

Microinverters (one per panel)

Microinverter	Recommended module power	Max DC input	MPPT	Voc cold / Vmp hot	Check	DC/AC
Enphase IQ8PLUS-72-2-US	235–440 W	60 V	29–45 V	43.8 / 26.3 V	⚠ Works; below MPPT at peak heat	1.19
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	43.8 / 26.3 V	✗ Not a match: module voltage below MPPT range	0.91
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	43.8 / 26.3 V	⚠ Works; below MPPT at peak heat	0.44
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	43.8 / 26.3 V	⚠ Works; below MPPT at peak heat	1.06
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	43.8 / 26.3 V	⚠ Works; below MPPT at peak heat	0.99

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	578	11,564	6.08
Palmdale	1,835	633	12,662	6.69
Chula Vista	1,696	585	11,702	6.11
Huntington Beach	1,643	567	11,337	5.89
Riverside	1,696	585	11,702	6.21
Santa Clarita	1,724	595	11,896	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 345 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
Lumos S60-345-13-IM	345 W	≈17.9%	−0.370	40.8	11.2	—	—
LONGi LR4-60HPB-345M	345 W	≈19.5%	−0.339	40.2	11.06	product 2021, 2022	193
JinkoSolar JKM345M-60HBL	345 W	≈20.4%	−0.406	41.2	10.91	brand 12× (2014–2026)	45
REC Group REC345AA	345 W	≈20.5%	−0.279	43.4	10.12	brand 9× (2016–2025)	30

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 Lumos S60-345-13-IM?

Calculated from the panel area (1.93 m²): about 17.9% for the 345 W class. 345 W over 1.93 m² equals about 179 W per square meter.

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

PVWatts v8 with typical-year weather gives about 578 kWh per year per 345 W panel in Los Angeles and about 633 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.370 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 19.1% 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 3–13 panels per string (Voc at 2 °C = 43.8 V, Vmp at 74 °C cell = 26.3 V). Final design must follow the inverter manual and NEC 690.7.

Is it bifacial?

Yes. Rear gain depends on mounting height and ground reflectance.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
JinkoSolar — datasheet THE MOST DEPENDABLE SOLAR BRAND.
JinkoSolar — manufacturer datasheet “Eagle HC 60M G2 315-335 Watt MONO PERC HALF CELL MODULE”.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (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 — APsystems (Alt Power System), Enphase, 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).