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Battery inverterAPsystems (Altenergy Power Sys…

APsystems (Altenergy Power System) ELS-9.6

Battery inverter, ac-coupled battery inverter. 6 models, 6.61 kW–11.4 kW AC at 208 V / 240 V.

UL 1741 SBCEC listed · Dec 2, 2024
Model
  • Rated AC power9.61 kW
  • CEC weighted efficiency94.0%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 6 models
ModelNominal ACGrid voltageCEC continuousRated AC (SAM)CEC weighted eff.DC test windowCEC listedUL 1741 SB
ELS-7.66.61 kW208 V6.61 kW6.61 kW93.0%51–60 VDec 2, 2024SB
ELS-7.67.61 kW240 V7.61 kW7.61 kW94.0%51–60 VDec 2, 2024SB
ELS-9.68.31 kW208 V8.31 kW8.31 kW93.5%51–60 VDec 2, 2024SB
ELS-9.69.61 kW240 V9.61 kW9.61 kW94.0%51–60 VDec 2, 2024SB
ELS-11.410 kW208 V10 kW10 kW93.5%51–60 VDec 2, 2024SB
ELS-11.411.4 kW240 V11.4 kW11.4 kW94.0%51–60 VDec 2, 2024SB

Efficiency

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

Compare with similar 9.61 kW inverters

CEC Grid Support Inverter List (Oct 7, 2026) · building permits
InverterPowerCEC weighted eff.DC test windowUL 1741 SBLatest CECSoCal permits
APsystems (Altenergy Power System) ELS6.61 kW–11.4 kW94.0%51–60 VYes20240
GoodWe GWxxxxA-BP5 kW–9.6 kW96.5%200–495 VYes20211
FOXESS AIO-AC1-x.x-US3.8 kW–11.4 kW97.0%85–500 VYes2025—
Hoymiles HAS-x.xLV-USG13.8 kW–11.5 kW94.0%50–60 VYes2024—
Alpha ESS SMILE-SPBx.x-INV7.6 kW–9.6 kW96.5%200–495 VYes2024—
Same type and grid voltage, power range covering this model; same fields from the same sources.

About APsystems (Altenergy Power System)

CEC Grid Support Inverter List (Oct 7, 2026)

Other series

ELS-xK

Documents

manufacturer documents

Questions & answers

How efficient is the APsystems (Altenergy Power System) ELS?

The California Energy Commission lists a weighted efficiency of 93.0–94.0% for APsystems (Altenergy Power System) ELS models, measured at six power levels and three DC voltages.

What sizes does the APsystems (Altenergy Power System) ELS come in?

The CEC list includes 6 models from 6.61 kW to 11.4 kW AC: ELS-7.6, ELS-7.6, ELS-9.6, ELS-9.6, ELS-11.4, ELS-11.4.

Is the APsystems (Altenergy Power System) ELS certified to UL 1741 SB?

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

Can the APsystems (Altenergy Power System) ELS be used with a battery?

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

What is the ELS-9.6’s DC input voltage range?

CEC tested it at 51–60 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. APsystems (Altenergy Power System) — document library on the manufacturer’s website (links above).
  3. NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
  4. Building permits — Southern California permit portals. Equipment matched from permit descriptions.