California
LADWP solar bill explainedString inverter. 2 models, 6.66 kW–7.68 kW AC at 208 V / 240 V.
| Model | Nominal AC | Grid voltage | CEC continuous | Rated AC (SAM) | CEC weighted eff. | DC test window | CEC listed | UL 1741 SB | In permits |
|---|---|---|---|---|---|---|---|---|---|
| 1538000-xx-y | 6.66 kW | 208 V | 6.56 kW | 6.56 kW | 97.5% | 270–480 V | Jan 4, 2021 | SB | 28 |
| 1538000-xx-y | 7.68 kW | 240 V | 7.58 kW | 7.58 kW | 98.0% | 270–480 V | Jan 4, 2021 | SB | 28 |
| Panel | Power | Voc cold | Vmp hot | Panels per string | Installed together |
|---|---|---|---|---|---|
| Qcells Q.PEAK DUO BLK ML-G10+ 410 | 410 W | 48.1 V | 30.6 V | 2–12 | 2 |
| REC Group REC460AA Pure-RX | 460 W | 68.8 V | 47.1 V | 2–8 | 2 |
| Qcells Q.PEAK DUO BLK ML-G10.C+ 410 | 410 W | 48.1 V | 30.6 V | 2–12 | — |
| LONGi LR5-54HABB-400M | 400 W | 39.3 V | 25.3 V | 3–15 | — |
| JA Solar JAM54S31-405/MR | 405 W | 39.4 V | 25.5 V | 3–15 | — |
| Hyundai Solutions HiN-T440NF(BK) | 440 W | 40.9 V | 27 V | 3–14 | — |
| Silfab Solar SIL-440QD | 440 W | 41.1 V | 28 V | 3–14 | — |
| Qcells Q.TRON BLK M-G2+ 430 | 430 W | 41.3 V | 28 V | 3–14 | — |
| Qcells Q.TRON BLK M-G2.H+ 430 | 430 W | 41.3 V | 28 V | 3–14 | — |
| Elin (Sirius PV) ELNSM54M-HC-410 | 410 W | 39.3 V | 25.3 V | 3–15 | — |
| Qcells Q.TRON BLK M-G2.C+ 430 | 430 W | 41.3 V | 28 V | 3–14 | — |
| Tesla TSP-420 | 420 W | 43.4 V | 27.7 V | 3–13 | — |
| System | Energy | Power | Chemistry | CEC listed |
|---|---|---|---|---|
| Tesla Inc. 1850000-XX-Y | 13.5 kWh | 7.6 kW | Lithium Ion | May 3, 2021 |
| Inverter | Power | CEC weighted eff. | DC test window | UL 1741 SB | Latest CEC | SoCal permits |
|---|---|---|---|---|---|---|
| Tesla 1538000-xx-y | 6.66 kW–7.68 kW | 98.0% | 270–480 V | Yes | 2021 | 56 |
| GoodWe GEPx.x-1-US30 | 4.33 kW–11.4 kW | 97.0% | 143–500 V | Yes | 2022 | — |
| GoodWe GW11K4-MS-US30 | 9.88 kW–11.4 kW | 97.0% | 217–500 V | Yes | 2022 | — |
| GoodWe GWxxxx-MS-US30 | 4.33 kW–9.6 kW | 97.0% | 143–500 V | Yes | 2022 | — |
| GoodWe GWxxxxA-MS | 5 kW–9.6 kW | 97.5% | 210–480 V | Yes | 2021 | — |
The California Energy Commission lists a weighted efficiency of 97.5–98.0% for Tesla 1538000-xx-y models, measured at six power levels and three DC voltages. The datasheet states a peak efficiency of 98.6%.
The CEC list includes 2 models from 6.66 kW to 7.68 kW AC: 1538000-xx-y, 1538000-xx-y.
Yes — the CEC Grid Support Inverter List shows UL 1741 SB for all models.
CEC-certified storage systems that include it: Tesla Inc. 1850000-XX-Y. In Southern California permits it was installed with Tesla Powerwall 2, Tesla Powerwall+, Tesla Powerwall.
Max DC input voltage is 600 V per the datasheet. MPPT operating range 60–480 V. CEC tested it at 270–480 V DC.
25 years standard (manufacturer datasheet).
Building permits name this series 74 times (Jul 2021 – Sep 2026). The most active licensed installers are Solar Shoppers Construction, A P Electrical, Action Solar.