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Battery inverterDelta Electronics

Delta Electronics PCS125

Battery inverter, ac-coupled battery inverter. 1 model, 125 kW AC at 480 V.

CEC listed · May 11, 2020

Rated AC power125 kW
CEC weighted efficiency97.0%

AC output (grid side)

CEC Grid Support Inverter List (Oct 7, 2026)

Rated AC power125 kW
CEC-measured continuous output125 kW
Grid voltage480 V
Phase3-phase 480 V

Efficiency

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

CEC weighted efficiency97.0%
Night-time standby (tare)22.4 W
Power to start converting681 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 — CSA Group
Firmware tested (SA)1.1.8.4
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 May 11, 2020)
CEC listedMay 11, 2020

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

Compare with similar 125 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
Delta Electronics PCSxxx	125 kW–125 kW	97.0%	750–1,000 V	—	2020	0
Kehua BCSxxK-B-HM-US X2	75 kW–175 kW	98.5%	720–1,450 V	Yes	2024	—
Growatt WIT xxK-A-US	50 kW–100 kW	99.0%	750–900 V	Yes	2024	—
Growatt WIT xxK-AU-US	50 kW–100 kW	99.0%	750–900 V	Yes	2024	—
CPS (Chint Power Systems) CPS ECBxx.xKTL-M/US-480	62.5 kW–125 kW	97.5%	750–1,100 V	Yes	2020	—

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

About Delta Electronics

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerDelta Electronics
Listed in CEC asDelta Electronics
Websitedelta-americas.com
Models on CEC lists138

Other series

PCSxxxHVME8 Plus-TL-US(AC)Ex-TL-US(AC)PCSxxxHV

Questions & answers

How efficient is the Delta Electronics PCSxxx?

The California Energy Commission lists a weighted efficiency of 97.0% for Delta Electronics PCSxxx models, measured at six power levels and three DC voltages.

Is the Delta Electronics PCSxxx certified to UL 1741 SB?

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

Can the Delta Electronics PCSxxx be used with a battery?

The CEC lists it as a ac-coupled battery inverter.

What is the PCS125’s DC input voltage range?

CEC tested it at 750–1,000 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).
Building permits — Southern California permit portals. Equipment matched from permit descriptions.