Rhombus Energy Solutions RES-BESS60DP-480

Hybrid inverter, dc-coupled hybrid (pv + battery). 1 model, 60 kW AC at 480 V.

CEC listed · Dec 11, 2020

Rated AC power60 kW
CEC weighted efficiency91.5%

DC input (PV side)

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

CEC test DC voltages (min / nom / max)270 / 441 / 870 V
DC input at rated output (CEC test)64.2 kW

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power60 kW
CEC-measured continuous output59.8 kW
Grid voltage480 V
Phase3-phase 480 V

Efficiency

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

CEC weighted efficiency91.5%
Night-time standby (tare)92 W
Power to start converting1,232.5 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.)No
UL 1741 SA (SA8–SA13)Yes — UL
Firmware tested (SA)00020520
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)No
Built-in meterYes
CEC listedDec 11, 2020
Last CEC updateFeb 11, 2022

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

Monitoring & communication

CEC Grid Support Inverter List (Oct 7, 2026)

Built-in production meterBuilt-in meter (CEC listing)

Panel compatibility & string sizing

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

CityColdest air, °CHottest cell, °C

RES-BESS60DP-480: max DC 870 V · MPPT 270–870 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	9–18	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 V	30.6 V	9–18	—
LONGi LR5-54HABB-400M	400 W	39.3 V	25.3 V	11–22	—
JA Solar JAM54S31-405/MR	405 W	39.4 V	25.5 V	11–22	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 V	27 V	10–21	—
Silfab Solar SIL-440QD	440 W	41.1 V	28 V	10–21	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 V	28 V	10–21	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 V	28 V	10–21	—
REC Group REC460AA Pure-RX	460 W	68.8 V	47.1 V	6–12	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 V	25.3 V	11–22	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 V	28 V	10–21	—
Tesla TSP-420	420 W	43.4 V	27.7 V	10–20	—

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 60 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
Rhombus Energy Solutions RES-BESSxxDP-480	60 kW–60 kW	91.5%	270–870 V	—	2020	0
Fortress Power FP-Nano-xxk-N	29.9 kW–59.8 kW	97.5%	500–850 V	Yes	2026	—
Solis (Ginlong Technologies) S6-EH3PxxK04-NV-YD-H-US(21A)	39.8 kW–59.8 kW	97.5%	500–850 V	Yes	2026	—
Solis (Ginlong Technologies) S6-EH3PxxK04-NV-YD-H-US	40 kW–60 kW	97.5%	360–850 V	Yes	2025	—
Growatt WIT xxK-H-US	50 kW–100 kW	96.5%	520–800 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 Rhombus Energy Solutions RES-BESSxxDP-480?

The California Energy Commission lists a weighted efficiency of 91.5% for Rhombus Energy Solutions RES-BESSxxDP-480 models, measured at six power levels and three DC voltages.

Is the Rhombus Energy Solutions RES-BESSxxDP-480 certified to UL 1741 SB?

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

Can the Rhombus Energy Solutions RES-BESSxxDP-480 be used with a battery?

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

What is the RES-BESS60DP-480’s DC input voltage range?

CEC tested it at 270–870 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).