38.4″ · 976 mm wide

Solar panelSonali Energees

Sonali Energees SS 315

Name: Sonali Energees SS 315
Brand: Sonali Energees

60 cells. Power classes 270–350 W in the CEC list.

CEC listed · Jul 21, 2020UL 61730

Power class

Power (STC)315 WCEC nameplate
Efficiency≈16.4%calculated from area
%/°C Pmax−0.439CEC listing test
PTC / STC91.6%PTC 288 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 17 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
SS 270	270 W	43.20	8.05	36.00	7.50	≈14.2%	233 W	—
SS-270	270 W	38.00	9.20	31.60	8.55	≈16.7%	245 W	Jul 21, 2020
SS-275	275 W	38.15	9.25	31.80	8.65	≈17.0%	250 W	Jul 21, 2020
SS 280	280 W	43.92	8.15	36.58	7.66	≈14.7%	242 W	—
SS-280	280 W	38.30	9.35	32.00	8.75	≈17.3%	254 W	Jul 21, 2020
SS 290	290 W	43.92	8.30	36.72	7.90	≈15.2%	251 W	—
SS 300	300 W	44.64	8.45	37.58	7.98	≈15.7%	274 W	—
SS 310	310 W	45.36	8.55	37.90	8.17	≈16.2%	284 W	—
SS 315	315 W	45.72	8.59	38.10	8.27	≈16.4%	288 W	—
SS 320	320 W	46.08	8.62	38.30	8.36	≈16.7%	293 W	—
SS-320	320 W	46.50	9.15	37.65	8.50	≈16.7%	289 W	Jul 21, 2020
SS-325	325 W	46.60	9.20	37.80	8.60	≈16.9%	293 W	Jul 21, 2020
SS-330	330 W	46.70	9.25	37.95	8.70	≈17.2%	298 W	Jul 21, 2020
SS-335	335 W	46.80	9.30	38.10	8.80	≈17.4%	303 W	Jul 21, 2020
SS-340	340 W	46.90	9.35	38.25	8.90	≈17.7%	310 W	Jul 21, 2020
SS-345	345 W	47.00	9.40	38.55	8.95	≈18.0%	314 W	Jul 21, 2020
SS-350	350 W	47.10	9.45	38.90	9.00	≈18.2%	319 W	Jul 21, 2020

≈ efficiency = Pmax ÷ CEC-listed area 1.91 m².

Build & dimensions

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

Dimensions76.9 × 38.4 in1,954 × 976 mm
Module area1.91 m² (20.5 ft²)length × width
Cells60 cells
Back coverWhite backsheet

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.439 %/°C
Voc coefficient β	−0.331 %/°C
Isc coefficient α	+0.065 %/°C
Vmp coefficient	−0.202 %/°C
Operating cell temperature	NOCT 43.7 °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
270 W	190.7 W	30.89 V × 6.18 A	52.7 W	98%
270 W	197.6 W	29.01 V × 6.81 A	50.2 W	93%
275 W	201.1 W	29.19 V × 6.89 A	50.8 W	92%
280 W	197.9 W	31.38 V × 6.31 A	54.7 W	98%
280 W	204.7 W	29.37 V × 6.97 A	51.8 W	92%
290 W	204.9 W	31.5 V × 6.5 A	56.6 W	98%
300 W	201.7 W	33.62 V × 6 A	57.8 W	96%
310 W	208.3 W	33.91 V × 6.14 A	59.5 W	96%
315 W	212 W	34.09 V × 6.22 A	60.6 W	96%
320 W	215.4 W	34.27 V × 6.29 A	61.5 W	96%
320 W	235.6 W	34.5 V × 6.83 A	59.4 W	93%
325 W	239.1 W	34.6 V × 6.91 A	60 W	92%
330 W	243.3 W	34.8 V × 6.99 A	61 W	92%
335 W	246.7 W	34.9 V × 7.07 A	62 W	93%
340 W	251 W	35.3 V × 7.11 A	65.5 W	96%
345 W	253.8 W	35.5 V × 7.15 A	66.4 W	96%
350 W	258.1 W	35.9 V × 7.19 A	67.4 W	96%

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) · NLR PVWatts v8 · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

49.2 V

Voc when cold

per panel

34.3 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	2–12
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–12
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–12
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	7–10

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	49.2 / 34.3 V	✓ Within range	1.09
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	49.2 / 34.3 V	✓ Within range	0.4
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	49.2 / 34.3 V	✓ Within range	0.97
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	49.2 / 34.3 V	✓ Within range	0.9

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	528	11,615	6.08
Palmdale	1,835	578	12,717	6.69
Chula Vista	1,696	534	11,753	6.11
Huntington Beach	1,643	518	11,386	5.89
Riverside	1,696	534	11,753	6.21
Santa Clarita	1,724	543	11,947	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 315 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	Size	PVEL (product / brand)	SoCal permits (series)
Sonali Energees SS 315	315 W	≈16.4%	−0.439	45.72	8.59	76.9 in	—	—
JinkoSolar JKM315M-60HBL	315 W	≈18.7%	−0.407	40.7	10.04	66.3 × 39.4 in	brand 12× (2014–2026)	45
LG Electronics LG320N1C-N5	320 W	≈18.5%	−0.342	40.8	10.53	66.9 × 40 in	product 2021	5
REC Group REC315NP	315 W	≈19.4%	−0.351	40.5	10.09	—	brand 9× (2016–2025)	4

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 Sonali Energees SS 315?

Calculated from the panel area (1.91 m²): about 16.4% for the 315 W class. 315 W over 1.91 m² equals about 165 W per square meter.

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

PVWatts v8 with typical-year weather gives about 528 kWh per year per 315 W panel in Los Angeles and about 578 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.439 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 22.7% 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 2–12 panels per string (Voc at 2 °C = 49.2 V, Vmp at 74 °C cell = 34.3 V). Final design must follow the inverter manual and NEC 690.7.

Does it work with Enphase IQ8PLUS-72-2-US microinverters?

Voltage check against the Enphase datasheet: Voc when cold 49.2 V vs max input 60 V; Vmp when hot 34.3 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

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”.
LG Electronics — datasheet Specification Sheet.
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 — 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).