Illustration

Hybrid inverterOxford Intelligent Energy

Oxford Intelligent Energy OE 8KHS/LV

Name: Oxford Intelligent Energy OE 8KHS/LV
Brand: Oxford Intelligent Energy

Hybrid inverter, dc-coupled hybrid (pv + battery). 8 models, 5 kW–10 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · Dec 1, 2023

Model

Rated AC power8 kW
CEC weighted efficiency96.5%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 8 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
OE 5KHS/LV	5 kW	208 V	5.02 kW	5.02 kW	96.5%	200–480 V	Mar 11, 2024	SB
OE 5KHS/LV	5 kW	240 V	5.04 kW	5.04 kW	96.5%	200–480 V	Mar 11, 2024	SB
OE 6KHS/LV	6 kW	208 V	6.12 kW	6.12 kW	96.5%	200–480 V	Mar 11, 2024	SB
OE 6KHS/LV	6 kW	240 V	6.15 kW	6.15 kW	96.5%	200–480 V	Mar 11, 2024	SB
OE 8KHS/LV	8 kW	208 V	8.06 kW	8.06 kW	96.5%	200–480 V	Dec 1, 2023	SB
OE 8KHS/LV	8 kW	240 V	8.05 kW	8.05 kW	96.5%	200–480 V	Dec 1, 2023	SB
OE 10KHS/LV	10 kW	208 V	10.2 kW	10.2 kW	96.5%	200–480 V	Dec 1, 2023	SB
OE 10KHS/LV	10 kW	240 V	10.1 kW	10.1 kW	96.5%	200–480 V	Dec 1, 2023	SB

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

DC input (PV side)

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

CEC test DC voltages (min / nom / max)200 / 360 / 480 V
DC input at rated output (CEC test)8.33 kW

Efficiency

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

CEC weighted efficiency96.5%
Night-time standby (tare)15 W
Power to start converting43.5 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.)Yes — SGS, certificate Jan 24, 2025
UL 1741 SA (SA8–SA13)Yes — SGS
Firmware tested (SA)051001
Volt-VAr with reactive power priority (SA13)Yes
Freq-Watt / Volt-Watt (SA14–15)Yes
Disable permit service / limit active power (SA17–18)Yes
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)Yes (attested Dec 23, 2024)
Anti-islanding method groupsGroups 1 (manufacturer-reported)
Power control system (PCS)Stated in CEC listing (power control system)
CEC listedDec 1, 2023
Last CEC updateMay 21, 2026

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

OE 8KHS/LV: max DC 480 V · MPPT 200–480 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	7–9	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	7–9	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	8–12	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	8–12	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	8–11	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	8–11	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	8–11	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	8–11	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	5–6	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	8–12	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	8–11	—
Tesla TSP-420	420 W	43.4 V	27.7 V	8–11	—

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 8 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
Oxford Intelligent Energy OE xKHS/LV	5 kW–10 kW	96.5%	200–480 V	Yes	2024	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
Qcells Q.VOLT Hx.xSX	3.8 kW–7.6 kW	97.5%	175–500 V	Yes	2023	25
SolarEdge SExxxxxA-US	3.8 kW–11.4 kW	98.0%	320–500 V	No	2024	18

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

About Oxford Intelligent Energy

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerOxford Intelligent Energy
Listed in CEC asOxford Intelligent Energy Co., Ltd.
Models on CEC lists44

Other series

OE 11K4HS/LVOE 7K6HS-T2/LVOE 7K6HS/LV

Questions & answers

How efficient is the Oxford Intelligent Energy OE xKHS/LV?

The California Energy Commission lists a weighted efficiency of 96.5% for Oxford Intelligent Energy OE xKHS/LV models, measured at six power levels and three DC voltages.

What sizes does the Oxford Intelligent Energy OE xKHS/LV come in?

The CEC list includes 8 models from 5 kW to 10 kW AC: OE 5KHS/LV, OE 5KHS/LV, OE 6KHS/LV, OE 6KHS/LV, OE 8KHS/LV, OE 8KHS/LV, OE 10KHS/LV, OE 10KHS/LV.

Is the Oxford Intelligent Energy OE xKHS/LV certified to UL 1741 SB?

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

Can the Oxford Intelligent Energy OE xKHS/LV be used with a battery?

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

What is the OE 8KHS/LV’s DC input voltage range?

CEC tested it at 200–480 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).