Illustration · 156 cells

Solar panelPT. NUSA SOLAR INDONESIA

PT. NUSA SOLAR INDONESIA NS620M10T-B78yy

Name: PT. NUSA SOLAR INDONESIA NS620M10T-B78yy
Brand: PT. NUSA SOLAR INDONESIA

156 cells. Power classes 600–645 W in the CEC list.

CEC listed · May 1, 2025UL 61730

Power class

Power (STC)620 WCEC nameplate
Efficiency≈22.2%calculated from area
%/°C Pmax−0.301CEC listing test
PTC / STC94%PTC 583 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 10 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
NS600M10T-B78yy	600 W	56.11	13.70	46.34	12.95	≈21.5%	564 W	May 1, 2025
NS605M10T-B78yy	605 W	56.30	13.75	46.53	13.00	≈21.7%	568 W	May 1, 2025
NS610M10T-B78yy	610 W	56.50	13.81	46.72	13.06	≈21.9%	573 W	May 1, 2025
NS615M10T-B78yy	615 W	56.70	13.87	46.91	13.12	≈22.0%	578 W	May 1, 2025
NS620M10T-B78yy	620 W	56.90	13.93	47.10	13.18	≈22.2%	583 W	May 1, 2025
NS625M10T-B78yy	625 W	57.10	13.99	47.29	13.24	≈22.4%	588 W	May 1, 2025
NS630M10T-B78yy	630 W	57.30	14.04	47.48	13.29	≈22.6%	593 W	May 1, 2025
NS635M10T-B78yy	635 W	57.50	14.09	47.67	13.34	≈22.8%	597 W	May 1, 2025
NS640M10T-B78yy	640 W	57.70	14.14	47.86	13.39	≈22.9%	602 W	May 1, 2025
NS645M10T-B78yy	645 W	57.90	14.19	48.05	13.44	≈23.1%	607 W	May 1, 2025

≈ efficiency = Pmax ÷ CEC-listed area 2.79 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.79 m² (30 ft²)CEC-listed area
Cells156 cells
FrameSilver frame

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.301 %/°C
Voc coefficient β	−0.246 %/°C
Isc coefficient α	+0.042 %/°C
Operating cell temperature	NOCT 46.4 °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
600 W	456.4 W	44.03 V × 10.37 A	116.9 W	97%
605 W	460 W	44.21 V × 10.41 A	117.9 W	97%
610 W	464 W	44.39 V × 10.45 A	118.9 W	97%
615 W	468 W	44.57 V × 10.5 A	119.9 W	98%
620 W	472.1 W	44.75 V × 10.55 A	121 W	98%
625 W	476.2 W	44.93 V × 10.6 A	122 W	98%
630 W	479.9 W	45.11 V × 10.64 A	123 W	98%
635 W	483.6 W	45.29 V × 10.68 A	123.9 W	98%
640 W	487.4 W	45.47 V × 10.72 A	124.9 W	98%
645 W	491.1 W	45.65 V × 10.76 A	125.8 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

60.1 V

Voc when cold

per panel

39.2 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	2–9
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–9
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	3–9
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	6–8

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	1,039	11,430	6.08
Palmdale	1,835	1,138	12,515	6.69
Chula Vista	1,696	1,052	11,567	6.11
Huntington Beach	1,643	1,019	11,205	5.89
Riverside	1,696	1,052	11,567	6.21
Santa Clarita	1,724	1,069	11,758	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 620 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)
PT. NUSA SOLAR INDONESIA NS620M10T-B78yy	620 W	≈22.2%	−0.301	56.9	13.93	—
ZNShine Solar ZXM7-UHLDD144-615/N	615 W	≈24%	−0.281	52.9	14.72	product 2024, 2025, 2026
JinkoSolar JKM620N-66HL4M-BDV	620 W	≈23%	−0.299	49.08	16.08	product 2025
Waaree BiN-21-620	620 W	≥22.9%	−0.288	49.1	16.02	product 2026

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 PT. NUSA SOLAR INDONESIA NS620M10T-B78yy?

Calculated from the panel area (2.79 m²): about 22.2% for the 620 W class. 620 W over 2.79 m² equals about 222 W per square meter.

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

PVWatts v8 with typical-year weather gives about 1,039 kWh per year per 620 W panel in Los Angeles and about 1,138 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.301 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.6% 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 2–9 panels per string (Voc at 2 °C = 60.1 V, Vmp at 74 °C cell = 39.2 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).
JinkoSolar — datasheet THE MOST DEPENDABLE SOLAR PRODUCT.
Waaree — datasheet ELITE-R-SERIES-BiN-21-600-635-WEL-EPD-600-635-132-BiN-HC.
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).
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).