Illustration

String inverterSolarEdge

SolarEdge SE50KUS

Name: SolarEdge SE50KUS
Brand: SolarEdge

String inverter. 19 models, 9 kW–330 kW AC at 208 V / 480 V / 600 V / 690 V. used with power optimizers.

UL 1741 SB · 16 of 19 modelsCEC listed · Jul 1, 2017Rapid shutdownInstalled in 14 SoCal permits

Model

Rated AC power50 kW
CEC weighted efficiency97.0%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · building permits · 19 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB	In permits
SE9KUS	9 kW	208 V	8.96 kW	8.96 kW	96.5%	384–504 V	Jul 1, 2017	—	—
SE10KUS	10 kW	480 V	9.85 kW	9.85 kW	98.0%	100–962 V	Jul 1, 2017	—	—
SE10KUS	10 kW	208 V	10 kW	10 kW	97.0%	400–600 V	Feb 13, 2023	SB	—
SE14.4KUS	14.4 kW	208 V	14.5 kW	14.5 kW	97.0%	400–600 V	Jul 1, 2017	SB	1
SE17.3KUS	17.3 kW	208 V	16.6 kW	16.6 kW	97.0%	400–600 V	Aug 11, 2020	SB	2
SE20KUS	20 kW	480 V	20.1 kW	20.1 kW	98.0%	842–962 V	Jul 1, 2017	—	—
SE30KUS	30 kW	480 V	30.2 kW	30.2 kW	98.5%	790–950 V	Jan 2, 2018	SB	1
SE33.3KUS	33.3 kW	480 V	33.3 kW	33.3 kW	98.5%	790–950 V	Jul 1, 2017	SB	—
SE40KUS	40 kW	480 V	40.3 kW	40.3 kW	98.5%	790–950 V	Aug 11, 2020	SB	2
SE43.2KUS	43.2 kW	208 V	14.5 kW	14.5 kW	97.0%	400–600 V	Feb 1, 2018	SB	1
SE50KUS	50 kW	208 V	16.6 kW	16.6 kW	97.0%	400–600 V	Dec 13, 2021	SB	5
SE66.6KUS	66.6 kW	480 V	33.3 kW	33.3 kW	98.5%	790–950 V	Feb 1, 2018	SB	2
SE80KUS	80 kW	480 V	40.3 kW	40.3 kW	98.5%	790–950 V	Jul 1, 2021	SB	1
SE100KUS	100 kW	480 V	33.3 kW	33.3 kW	98.5%	790–950 V	Feb 1, 2018	SB	2
SE110KUS	110 kW	480 V	110 kW	110 kW	98.5%	795–950 V	Nov 21, 2023	SB	—
SE120KUS	120 kW	480 V	40.3 kW	40.3 kW	98.5%	790–950 V	Jul 1, 2021	SB	2
SE250KUS	250 kW	600 V	249.9 kW	249.9 kW	99.0%	1,090–1,320 V	Apr 1, 2025	SB	—
SE285KUS	285 kW	600 V	284.2 kW	284.2 kW	99.0%	1,090–1,320 V	Apr 1, 2025	SB	—
SE330KUS	330 kW	690 V	329.7 kW	329.7 kW	99.0%	1,200–1,400 V	Jul 11, 2025	SB	—

DC input (PV side)

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

CEC test DC voltages (min / nom / max)400 / 460 / 600 V
DC input at rated output (CEC test)17.2 kW

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power50 kW
CEC-measured continuous output16.6 kW
Grid voltage208 V / 480 V / 600 V / 690 V
Phase3-phase 208 V, 3-phase 480 V, 3-phase 600 V, 3-phase 690 V

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)5.28 W
Power to start converting41.3 W

CEC weighted efficiency is measured by an accredited lab at six power levels and three DC voltages — the number to compare between inverters.

Grid & smart-inverter certification

CEC Grid Support Inverter List (Oct 7, 2026) · SolarEdge datasheet

UL 1741 SB (3rd ed.)16 of 19 models — Intertek, certificate Nov 8, 2024
UL 1741 SA (SA8–SA13)14 of 19 models — Intertek
Firmware tested (SA)2.19.1207, 2.19.759, 2.20.223
Volt-VAr with reactive power priority (SA13)14 of 19 models
Freq-Watt / Volt-Watt (SA14–15)14 of 19 models
Disable permit service / limit active power (SA17–18)13 of 19 models
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*) (18 of 19 models)
Monitor key data & scheduling (Rule 21 Phase 3)17 of 19 models (attested Jul 11, 2025)
Built-in meterYes
CEC listedJul 1, 2017
Last CEC updateFeb 1, 2023
Standards listed on the datasheetUL 1741 SA, UL 1741, UL 1741 SB, IEEE 1547, UL 1699B, FCC Part 15, NEC 690.12 (rapid shutdown)
CEC notePerformance data is the same as SE14.4KUS.

UL 1741 SB is required for new interconnections in California (Rule 21) since 2026.

Safety & protection

SolarEdge datasheet

Rapid shutdown (NEC 690.12)Yes (NEC 690.12, datasheet)
Arc-fault protection (UL 1699B)Yes — UL 1699B

Monitoring & communication

SolarEdge datasheet · CEC Grid Support Inverter List (Oct 7, 2026)

InterfacesWi-Fi, Ethernet, RS485, Cellular
Built-in production meterBuilt-in meter (CEC listing)

Size, weight & environment

SolarEdge datasheet

Enclosure ratingNEMA 3R
CoolingFan-cooled
Operating temperature−40 to +60 °C

Panel compatibility & string sizing

NLR SAM inverter library · NLR PVWatts v8 · CEC PV Module List · Cali-Graf calculation

CityColdest air, °CHottest cell, °C

SE50KUS: max DC 600 V · MPPT 400–600 V (CEC test window)

Most-permitted panels in Southern California

Panel	Power	Voc cold	Vmp hot	Panels per string	Installed together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410	410 W	48.1 V	30.6 V	no fit	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	no fit	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	no fit	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	no fit	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	no fit	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	no fit	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	no fit	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	no fit	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	no fit	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	no fit	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	no fit	—
Tesla TSP-420	420 W	43.4 V	27.7 V	no fit	—

Usually installed with power optimizers: string length follows the optimizer rules, not panel voltage — use the manufacturer’s designer.

Voltage check only, from CEC panel data and NLR weather for the city. Final design must follow the inverter manual and NEC 690.7.

What it's installed with

building permits

Panels

Qcells Q.PEAK DUO

JinkoSolar JKMxxxM-72HL-TV

Optimizers

SolarEdge (model not specified)

SolarEdge Power Optimizer

Gateways & interfaces

IronRidge (model not specified)

Unirac (model not specified)

Permits naming both; 13 of 14 permits list other equipment.

Installed in Southern California

building permits

Permits name it

Feb 2021 – Jul 2026

Jurisdictions so far

LA County (unincorp.) (9), Los Angeles (3), Chula Vista (1), Los Angel

85.3 kW

Typical system

median of 8 permits

Permits over time

Model named in permit

SE50KUS

SE120KUS

SE40KUS

SE100KUS

SE66.6KUS

SE17.3KUS

Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.), Los Angeles come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.

Who installs SExKUS in SoCal

building permits · CSLB License Master

Grid Alternatives

Oakland · CSLB #867533

2 installsMar 2022 – Jul 2026Chula Vista, Los Angeles

Compare with similar 50 kW inverters

CEC Grid Support Inverter List (Oct 7, 2026) · building permits

Inverter	Power	CEC weighted eff.	DC test window	UL 1741 SB	Latest CEC	SoCal permits
SolarEdge SExKUS	9 kW–330 kW	97.0%	400–600 V	Yes	2025	19
SMA STP xx-US-80	27.5 kW–70 kW	97.5%	300–850 V	Yes	2026	—
Yaskawa Solectria Solar PVI-xxTL-208	25 kW–50 kW	96.5%	200–850 V	Yes	2025	—
Solis (Ginlong Technologies) S5-GC60K-LV-US	60 kW–60 kW	98.0%	400–650 V	Yes	2025	—
CPS (Chint Power Systems) SCAxxK-T-US-208	50 kW–50 kW	96.5%	200–700 V	Yes	2025	—

Same type and grid voltage, power range covering this model; same fields from the same sources.

About SolarEdge

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerSolarEdge
Listed in CEC asSolarEdge Technologies Ltd.
Websitesolaredge.com
Models on CEC lists135

Questions & answers

How efficient is the SolarEdge SExKUS?

The California Energy Commission lists a weighted efficiency of 96.5–99.0% for SolarEdge SExKUS models, measured at six power levels and three DC voltages.

What sizes does the SolarEdge SExKUS come in?

The CEC list includes 19 models from 9 kW to 330 kW AC: SE9KUS, SE10KUS, SE10KUS, SE14.4KUS, SE17.3KUS, SE20KUS, SE30KUS, SE33.3KUS….

Is the SolarEdge SExKUS certified to UL 1741 SB?

Yes — the CEC Grid Support Inverter List shows UL 1741 SB for 16 of 19 models.

What is the SE50KUS’s DC input voltage range?

CEC tested it at 400–600 V DC.

Who installs it in Southern California?

Building permits name this series 14 times (Feb 2021 – Jul 2026). The most active licensed installers are Grid Alternatives.

Sources

California Energy Commission — Grid Support Inverter List (solar and battery inverters), data as of Oct 7, 2026. Manufacturer-reported, confirmed by CEC against certificates and test reports.
SolarEdge — manufacturer datasheet “INVERTERS Three Phase Inverters for the 120/208V Grid”.
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, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
California Energy Commission — PV Module List (module electrical data for the compatibility check).
Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Feb 2021 – May 2025); LADBS, City of Los Angeles (Jun 2023 – Oct 2025); City of Chula Vista (Jul 2026); LADBS, City of Los Angeles (Mar 2022). Equipment matched from permit descriptions by model number.
Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).