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MicroinverterSparq Systems

Sparq Systems Q2000-4102

Microinverter. 2 models, 1.2 kW–2 kW AC at 240 V.

CEC listed · Feb 1, 2019

Model

Rated AC power2 kW
CEC weighted efficiency97.0%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 2 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
Q1200-4102	1.2 kW	240 V	1.2 kW	1.2 kW	96.5%	36–38 V	Feb 1, 2019	—
Q2000-4102	2 kW	240 V	1.72 kW	1.72 kW	97.0%	36–38 V	Mar 13, 2023	—

DC input (PV side)

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

CEC test DC voltages (min / nom / max)36 / 38 / 38 V
DC input at rated output (CEC test)1.78 kW

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)0 W
Power to start converting21.4 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)

UL 1741 SB (3rd ed.)No
UL 1741 SA (SA8–SA13)Yes — Intertek
Firmware tested (SA)1.20.62
Volt-VAr with reactive power priority (SA13)Yes
Freq-Watt / Volt-Watt (SA14–15)Yes
Disable permit service / limit active power (SA17–18)No
CSIP (IEEE 2030.5) conformanceNo
Monitor key data & scheduling (Rule 21 Phase 3)No
CEC listedFeb 1, 2019

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

Panel compatibility & string sizing

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

CityColdest air, °CHottest cell, °C

Q2000-4102: max DC 38 V · MPPT 36–38 V (CEC test window)

Most-permitted panels in Southern California

Panel	Power	Voc cold / Vmp hot	Check	DC/AC	Installed together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410	410 W	48.1 / 30.6 V	✗ Cold Voc above max input	0.24	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 / 30.6 V	✗ Cold Voc above max input	0.24	—
LONGi LR5-54HABB-400M	400 W	39.3 / 25.3 V	✗ Cold Voc above max input	0.23	—
JA Solar JAM54S31-405/MR	405 W	39.4 / 25.5 V	✗ Cold Voc above max input	0.24	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 / 27 V	✗ Cold Voc above max input	0.26	—
Silfab Solar SIL-440QD	440 W	41.1 / 28 V	✗ Cold Voc above max input	0.26	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 / 28 V	✗ Cold Voc above max input	0.25	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 / 28 V	✗ Cold Voc above max input	0.25	—
REC Group REC460AA Pure-RX	460 W	68.8 / 47.1 V	✗ Cold Voc above max input	0.27	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 / 25.3 V	✗ Cold Voc above max input	0.24	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 / 28 V	✗ Cold Voc above max input	0.25	—
Tesla TSP-420	420 W	43.4 / 27.7 V	✗ Cold Voc above max input	0.24	—

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

Compare with similar 2 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
Sparq Systems Qxxxx-4102	1.2 kW–2 kW	97.0%	36–38 V	—	2023	0
APsystems (Altenergy Power System) QSxxxx	1.2 kW–1.92 kW	96.5%	27–48 V	2 of 3	2025	—
Sol-Ark SA-MP-1000-208/240V	1 kW–1,000 kW	96.0%	40–55 V	Yes	2025	—
Northern Electric & Power BDM-xxx-240A	300 W–2 kW	96.5%	22–55 V	Yes	2024	—
Zhejiang Hyxi Technology HYX-Mxxx-S-NA	360 W–1.92 kW	97.0%	35–50 V	Yes	2024	—

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

Questions & answers

How efficient is the Sparq Systems Qxxxx-4102?

The California Energy Commission lists a weighted efficiency of 96.5–97.0% for Sparq Systems Qxxxx-4102 models, measured at six power levels and three DC voltages.

What sizes does the Sparq Systems Qxxxx-4102 come in?

The CEC list includes 2 models from 1.2 kW to 2 kW AC: Q1200-4102, Q2000-4102.

Is the Sparq Systems Qxxxx-4102 certified to UL 1741 SB?

The CEC list does not show UL 1741 SB certification for these models.

What is the Q2000-4102’s DC input voltage range?

CEC tested it at 36–38 V DC.

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.
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 — 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).