Cali-Graf in Southern California

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MicroinverterAptos Solar

Aptos Solar MAC-800R

Microinverter. 4 models, 382 W–766 W AC at 208 V / 240 V.

UL 1741 SBCEC listed · Sep 21, 2021

Model

Rated AC power766 W
CEC weighted efficiency96.5%

Models & power ratings

CEC Grid Support Inverter List (Oct 7, 2026) · NLR SAM inverter library · 4 models

Model	Nominal AC	Grid voltage	CEC continuous	Rated AC (SAM)	CEC weighted eff.	DC test window	CEC listed	UL 1741 SB
MAC-400R	382 W	208 V	387 W	387 W	96.5%	38–48 V	Nov 1, 2023	SB
MAC-400R	382 W	240 V	383 W	383 W	96.5%	34–48 V	Sep 21, 2021	SB
MAC-800R	766 W	208 V	767 W	767 W	96.5%	34–48 V	May 1, 2023	SB
MAC-800R	766 W	240 V	767 W	767 W	96.5%	34–48 V	Sep 21, 2021	SB

DC input (PV side)

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

CEC test DC voltages (min / nom / max)34 / 42 / 48 V
DC input at rated output (CEC test)795 W

Efficiency

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

CEC weighted efficiency96.5%
Night-time standby (tare)0.11 W
Power to start converting1.4 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 — CSA Group, certificate Mar 17, 2023
UL 1741 SA (SA8–SA13)2 of 4 models — CSA Group
Firmware tested (SA)V01.01.00
Volt-VAr with reactive power priority (SA13)2 of 4 models
Freq-Watt / Volt-Watt (SA14–15)2 of 4 models
Disable permit service / limit active power (SA17–18)2 of 4 models
CSIP (IEEE 2030.5) conformanceVia gateway during testing (Y*)
Monitor key data & scheduling (Rule 21 Phase 3)Yes (attested Nov 1, 2023)
CEC listedSep 21, 2021
Last CEC updateMay 1, 2023

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

MAC-800R: max DC 48 V · MPPT 34–48 V (CEC test window)

Most-permitted panels in Southern California

Panel	Power	Voc cold / Vmp hot	Check	DC/AC	Installed together
Qcells Q.PEAK DUO BLK ML-G10.C+ 410	410 W	48.1 / 30.6 V	✗ Cold Voc above max input	0.53	—
Qcells Q.PEAK DUO BLK ML-G10+ 410	410 W	48.1 / 30.6 V	✗ Cold Voc above max input	0.53	—
LONGi LR5-54HABB-400M	400 W	39.3 / 25.3 V	⚠ Below MPPT at peak heat	0.52	—
JA Solar JAM54S31-405/MR	405 W	39.4 / 25.5 V	⚠ Below MPPT at peak heat	0.53	—
Hyundai Solutions HiN-T440NF(BK)	440 W	40.9 / 27 V	⚠ Below MPPT at peak heat	0.57	—
Silfab Solar SIL-440QD	440 W	41.1 / 28 V	⚠ Below MPPT at peak heat	0.57	—
Qcells Q.TRON BLK M-G2+ 430	430 W	41.3 / 28 V	⚠ Below MPPT at peak heat	0.56	—
Qcells Q.TRON BLK M-G2.H+ 430	430 W	41.3 / 28 V	⚠ Below MPPT at peak heat	0.56	—
REC Group REC460AA Pure-RX	460 W	68.8 / 47.1 V	✗ Cold Voc above max input	0.6	—
Elin (Sirius PV) ELNSM54M-HC-410	410 W	39.3 / 25.3 V	⚠ Below MPPT at peak heat	0.53	—
Qcells Q.TRON BLK M-G2.C+ 430	430 W	41.3 / 28 V	⚠ Below MPPT at peak heat	0.56	—
Tesla TSP-420	420 W	43.4 / 27.7 V	⚠ Below MPPT at peak heat	0.55	—

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 766 W 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
Aptos Solar MAC-xxxR	382 W–766 W	96.5%	34–48 V	Yes	2023	0
Enphase Energy IQ8 Series	240 W–633 W	97.5%	25–95 V	44 of 45	2025	1,104
Hoymiles HM-xxxNT	295 W–1.44 kW	96.5%	29–48 V	11 of 12	2023	3
Power Center Dxxx-M2	696 W–696 W	96.5%	33–48 V	Yes	2022	2
FOXESS M1-1000-NA	1 kW–1 kW	95.5%	35–50 V	Yes	2026	—

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

About Aptos Solar

CEC Grid Support Inverter List (Oct 7, 2026)

ManufacturerAptos Solar
Listed in CEC asAptos Solar Technology LLC
Websiteaptossolar.com
Models on CEC lists175

Other series

MAC

Documents

manufacturer documents

PDF
Built for Safety
Datasheet · Aptos Solar Technology · Jun 2026
PDF
Built for Safety
Datasheet · Aptos Solar Technology · Jun 2026

Questions & answers

How efficient is the Aptos Solar MAC-xxxR?

The California Energy Commission lists a weighted efficiency of 96.5% for Aptos Solar MAC-xxxR models, measured at six power levels and three DC voltages.

What sizes does the Aptos Solar MAC-xxxR come in?

The CEC list includes 4 models from 382 W to 766 W AC: MAC-400R, MAC-400R, MAC-800R, MAC-800R.

Is the Aptos Solar MAC-xxxR certified to UL 1741 SB?

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

What is the MAC-800R’s DC input voltage range?

CEC tested it at 34–48 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.
Aptos Solar — document library on the manufacturer’s website (links above).
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).