17.8 × 25.7 × 10 in

Hybrid inverterSol-Ark

Sol-Ark 12K-2P-LL

Name: Sol-Ark 12K-2P-LL
Brand: Sol-Ark

Hybrid inverter, dc-coupled hybrid (pv + battery). 2 models, 12 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · Aug 11, 2026Rapid shutdown

Model

Rated AC power12 kW
CEC weighted efficiency97.0%
Warranty10 years

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · 2 models

Model	Nominal AC	Grid voltage	CEC continuous	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
12K-2P-LL	12 kW	208 V	12 kW	97.5%	250–425 V	Aug 11, 2026	SB
12K-2P-LL	12 kW	240 V	12 kW	97.0%	250–425 V	Aug 11, 2026	SB

Some models are also on the CEC Battery Inverter list — one product, two listings.

DC input (PV side)

Sol-Ark datasheet · CEC Grid Support Inverter List (Oct 7, 2026)

Full-power MPPT range150–425 V
CEC test DC voltages (min / nom / max)250 / 338 / 425 V
Start-up voltage125 V

AC output (grid side)

Sol-Ark datasheet · CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power12 kW
CEC-measured continuous output12 kW
Grid voltage208 V / 240 V
Phase208 V (1-phase of 3-phase service), split-phase 120/240 V
Frequency50 Hz

Efficiency

CEC Grid Support Inverter List (Oct 7, 2026) · Sol-Ark datasheet

CEC weighted efficiency97.0%
Peak efficiency97.6%
Night-time standby (tare)9.45 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) · Sol-Ark datasheet

UL 1741 SB (3rd ed.)Yes — TUV Rheinland of North America, certificate May 29, 2026
UL 1741 SA (SA8–SA13)No
Volt-VAr with reactive power priority (SA13)No
Freq-Watt / Volt-Watt (SA14–15)No
Disable permit service / limit active power (SA17–18)No
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Anti-islanding method groupsGroups 1 (manufacturer-reported)
CEC listedAug 11, 2026
Standards listed on the datasheetUL 1741, UL 1741 CRD, IEEE 1547, UL 1699B, UL 1998

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

Safety & protection

Sol-Ark datasheet

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

Monitoring & communication

Sol-Ark datasheet

InterfacesWi-Fi, Ethernet, RS485, Cellular, Modbus, CAN

Size, weight & environment

Sol-Ark datasheet

Dimensions (W × H × D)17.8 × 25.7 × 10 in
Weight65 lb (29.5 kg)
Enclosure ratingIP65, NEMA 3R
Operating temperature−40 to +60 °C

Warranty

Sol-Ark datasheet

Standard warranty10 years

Panel compatibility & string sizing

CEC Grid Support Inverter List (Oct 7, 2026) · NLR PVWatts v8 · CEC PV Module List · Cali-Graf calculation

CityColdest air, °CHottest cell, °C

12K-2P-LL: max DC 425 V · MPPT 250–425 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	10–10	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	10–10	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	10–10	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	9–10	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	9–10	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	9–10	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	6–6	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	10–10	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	9–10	—
Tesla TSP-420	420 W	43.4 V	27.7 V	no fit	—

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 12 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
Sol-Ark 12K-2P-LL	12 kW–12 kW	97.0%	250–425 V	Yes	2026	0
SolarEdge SExxxxH-US	3 kW–11.4 kW	99.0%	360–480 V	Yes	2025	1,046
Delta Electronics Ex-TL-US	3.33 kW–9.6 kW	97.5%	200–480 V	Yes	2022	28
SolarEdge SExxxxxA-US	3.8 kW–11.4 kW	98.0%	320–500 V	No	2024	18
Growatt MIN xxxxTL-XH-US	2.63 kW–11.4 kW	98.0%	125–480 V	Yes	2021	15

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

About Sol-Ark

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerSol-Ark
Listed in CEC asSol-Ark
Websitesol-ark.com
Models on CEC lists45

Other series

Limitless 18K-2P-LVLimitless xxK-LVxxK-3P-480VxxK-3P-208V5K-120V/8K-230V-1P

Documents

manufacturer documents

PDF
SA-12K-2P-LL Datasheet Rev1.1 PS-00045
Datasheet · Sol-Ark · May 2026
PDF
Limitless 12K-2P-LL Hybrid Inverter Datasheet (EN)
Datasheet · Sol-Ark · Jul 2026
PDF
12K-2P-LL QuickStart Rev1 22May2026
Manual · Sol-Ark · May 2026
PDF
Limitless 12K-2P-LL Hybrid Inverter Installation Manual
Manual · Sol-Ark · Jul 2026
PDF
12K-2P-LL QuickStart Rev1 28May2026
Manual · Sol-Ark · Jun 2026
PDF
Limitless 12K-2P-LL Hybrid Inverter Quickstart Guide
Manual · Sol-Ark · Jul 2026

Questions & answers

How efficient is the Sol-Ark 12K-2P-LL?

The California Energy Commission lists a weighted efficiency of 97.0–97.5% for Sol-Ark 12K-2P-LL models, measured at six power levels and three DC voltages. The datasheet states a peak efficiency of 97.6%.

What sizes does the Sol-Ark 12K-2P-LL come in?

The CEC list includes 2 models from 12 kW to 12 kW AC: 12K-2P-LL, 12K-2P-LL.

Is the Sol-Ark 12K-2P-LL certified to UL 1741 SB?

Yes — the CEC Grid Support Inverter List shows UL 1741 SB for all models.

Can the Sol-Ark 12K-2P-LL be used with a battery?

The CEC lists it as a dc-coupled hybrid (pv + battery).

What is the 12K-2P-LL’s DC input voltage range?

CEC tested it at 250–425 V DC.

What warranty does it have?

10 years standard (manufacturer datasheet).

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.
Sol-Ark — datasheet SA-12K-2P-LL Datasheet Rev1.1 PS-00045.
Sol-Ark — document library on the manufacturer’s website (links above).
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).