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Hybrid inverterFortress Power

Fortress Power EdgeOn Duo 15 Lite

Hybrid inverter, dc-coupled hybrid (pv + battery). 2 models, 10 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · Aug 11, 2026
Model
  • Rated AC power10 kW
  • CEC weighted efficiency96.5%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · 2 models
ModelNominal ACGrid voltageCEC continuousCEC weighted eff.DC test windowCEC listedUL 1741 SB
EdgeOn Duo 15 Lite10 kW208 V10.2 kW96.5%200–480 VAug 11, 2026SB
EdgeOn Duo 15 Lite10 kW240 V10.1 kW96.5%200–480 VAug 11, 2026SB
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)

Efficiency

CEC Grid Support Inverter List (Oct 7, 2026)
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 is required for new interconnections in California (Rule 21) since 2026.

Monitoring & communication

CEC Grid Support Inverter List (Oct 7, 2026)

Panel compatibility & string sizing

CEC Grid Support Inverter List (Oct 7, 2026) · NLR PVWatts v8 · CEC PV Module List · Cali-Graf calculation
EdgeOn Duo 15 Lite: max DC 480 V · MPPT 200–480 V (CEC test window)

Most-permitted panels in Southern California

PanelPowerVoc coldVmp hotPanels per stringInstalled together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410410 W48.1 V30.6 V7–9—
Qcells Q.PEAK DUO BLK ML-G10+ 410410 W48.1 V30.6 V7–9—
LONGi LR5-54HABB-400M400 W39.3 V25.3 V8–12—
JA Solar JAM54S31-405/MR405 W39.4 V25.5 V8–12—
Hyundai Solutions HiN-T440NF(BK)440 W40.9 V27 V8–11—
Silfab Solar SIL-440QD440 W41.1 V28 V8–11—
Qcells Q.TRON BLK M-G2+ 430430 W41.3 V28 V8–11—
Qcells Q.TRON BLK M-G2.H+ 430430 W41.3 V28 V8–11—
REC Group REC460AA Pure-RX460 W68.8 V47.1 V5–6—
Elin (Sirius PV) ELNSM54M-HC-410410 W39.3 V25.3 V8–12—
Qcells Q.TRON BLK M-G2.C+ 430430 W41.3 V28 V8–11—
Tesla TSP-420420 W43.4 V27.7 V8–11—
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 10 kW inverters

CEC Grid Support Inverter List (Oct 7, 2026) · building permits
InverterPowerCEC weighted eff.DC test windowUL 1741 SBLatest CECSoCal permits
Fortress Power EdgeOn Duo 15 Lite10 kW–10 kW96.5%200–480 VYes20260
SolarEdge SExxxxH-US3 kW–11.4 kW99.0%360–480 VYes20251,046
Delta Electronics Ex-TL-US3.33 kW–9.6 kW97.5%200–480 VYes202228
SolarEdge SExxxxxA-US3.8 kW–11.4 kW98.0%320–500 VNo202418
Growatt MIN xxxxTL-XH-US2.63 kW–11.4 kW98.0%125–480 VYes202115
Same type and grid voltage, power range covering this model; same fields from the same sources.

About Fortress Power

CEC Grid Support Inverter List (Oct 7, 2026)

Other series

EdgeOn Duo 12EdgeOn Duo 12 LiteEdgeOn Duo 15EdgeOn Duo 15 ProEdgeOn Duo 7.5EdgeOn Duo 9FP-Nano-30k-LFP-Nano-xxk-NFP-ENVY-xxKFP-Envy Duo 21

Documents

manufacturer documents

Questions & answers

How efficient is the Fortress Power EdgeOn Duo 15 Lite?

The California Energy Commission lists a weighted efficiency of 96.5% for Fortress Power EdgeOn Duo 15 Lite models, measured at six power levels and three DC voltages.

What sizes does the Fortress Power EdgeOn Duo 15 Lite come in?

The CEC list includes 2 models from 10 kW to 10 kW AC: EdgeOn Duo 15 Lite, EdgeOn Duo 15 Lite.

Is the Fortress Power EdgeOn Duo 15 Lite certified to UL 1741 SB?

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

Can the Fortress Power EdgeOn Duo 15 Lite be used with a battery?

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

What is the EdgeOn Duo 15 Lite’s DC input voltage range?

CEC tested it at 200–480 V DC.

Sources

  1. 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.
  2. Fortress Power — document library on the manufacturer’s website (links above).
  3. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
  4. California Energy Commission — PV Module List (module electrical data for the compatibility check).
  5. Building permits — Southern California permit portals. Equipment matched from permit descriptions.
  6. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).