Hyundai Energy Solutions named Top Performer, 2017–2025
This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.
Inverter compatibility & string sizing
Hyundai Energy Solutions datasheet · Cali-Graf calculation · NLR PVWatts v8 · CEC PV Module List (Oct 7, 2026) · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)
42.2 V
Voc when cold
per panel
27.5 V
Vmp when hot
per panel
14
Max panels / string
max DC 600 V
3
Min panels / string
MPPT from 60 V
Defaults come from NLR TMY weather (coldest hour, hottest modeled cell). Code calculations (NEC 690.7) use the ASHRAE extreme annual minimum, which is usually colder — enter it above.
String inverters most named in SoCal permits
Inverter
Max DC input
MPPT
Window source
Panels per string
Tesla 1538000-xx-y
600 V
60–480 V
datasheet
3–14
Solis (Ginlong) S6-EH1P10K-H-US
600 V
80–520 V
datasheet
3–14
Solis (Ginlong) Solis-1P7.6K-4G-US
600 V
100–500 V
datasheet
4–14
Qcells Q.VOLT H7.6SX
498 V
234–498 V
CEC test window
9–11
Microinverters (one per panel)
Microinverter
Recommended module power
Max DC input
MPPT
Voc cold / Vmp hot
Check
DC/AC
Enphase IQ8PLUS-72-2-US
235–440 W
60 V
29–45 V
42.2 / 27.5 V
⚠ Works; below MPPT at peak heat
1.52
Enphase IQ8X-80-M-US
320–540 W
79.5 V
43–60 V
42.2 / 27.5 V
✗ Not a match: module voltage below MPPT range
1.16
APsystems (Alt Power System) DS3-L
265–570 W
60 V
28–45 V
42.2 / 27.5 V
⚠ Works; below MPPT at peak heat
0.56
Enphase IQ8M-72-2-US
260–460 W
60 V
30–45 V
42.2 / 27.5 V
⚠ Works; below MPPT at peak heat
1.35
Enphase IQ8A-72-2-US
295–500 W
60 V
32–45 V
42.2 / 27.5 V
⚠ Works; below MPPT at peak heat
1.26
Voltage check against the microinverter datasheets — confirm the pairing on the manufacturer’s module compatibility list. Rows appear only when the panel’s power is inside the microinverter’s recommended module power range.
SolarEdge and other optimizer-based systems size strings by the optimizer rules — use the manufacturer’s designer. Reference inverters: most named in SoCal permits since Oct 2024.
Expected production in Southern California
NLR PVWatts v8 · Cali-Graf calculation
City
kWh / kW / yr
kWh / panel / yr
kWh / system / yr
Sun, kWh/m²/day
Los Angeles
1,676
737
11,799
6.08
Palmdale
1,835
807
12,918
6.69
Chula Vista
1,696
746
11,940
6.11
Huntington Beach
1,643
723
11,567
5.89
Riverside
1,696
746
11,940
6.21
Santa Clarita
1,724
759
12,137
6.28
Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.
Who installs HiS-TxxxNF(BK) panels in SoCal
building permits · CSLB License Master
8
Permits naming this series
Nov 2025 – Oct 2026
2
Licensed installers
CSLB license on the permit
4
Jurisdictions so far
LA County (unincorp.) (3), Palmdale (3), Chula Vista (1), Huntington B
Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Permits from LA County (unincorp.) come without a contractor license, so they count toward totals but not toward installers. Counts grow as more permit portals are loaded.
Installed together with
building permits
Microinverters
Enphase IQ8MC
2
Batteries
Tesla Powerwall 3
5
Number of permits naming both this panel series and the product; 7 of 8 permits list other equipment.
Compare with similar 440 W panels
CEC PV Module List (Oct 7, 2026) · datasheets · Kiwa PVEL Scorecard · building permits
Panel
Pmax
Efficiency
γ Pmax (CEC)
Voc, V
Isc, A
Warranty
PVEL (product / brand)
SoCal permits (series)
Hyundai Energy Solutions HiS-T440NF(BK)
440 W
≈22.7%
−0.277
39.9
14.06
25 / 30 yr
brand 5×
8
Qcells Q.TRON BLK M-G2+ 440
440 W
≥22.5%
−0.276
39.88
13.9
25 / 25 yr
brand 11× (2016–2026)
40
Silfab Solar SIL-440QD
440 W
≈22.6%
−0.294
38.97
14.25
25 / 30 yr
brand 7× (2017–2025)
39
REC Group REC440AA Pure-RX
440 W
≈21.8%
−0.248
64.8
8.74
—
brand 9× (2016–2025)
33
Same fields from the same sources for every row; ≈ efficiency is calculated from the listed area. Comparable series: other brands, same product group, power range covering this class.
How efficient is the Hyundai Energy Solutions HiS-T440NF(BK)?
Calculated from the panel area (1.94 m²): about 22.7% for the 440 W class. 440 W over 1.94 m² equals about 227 W per square meter.
How much energy does one panel produce in Los Angeles or Palmdale?
PVWatts v8 with typical-year weather gives about 737 kWh per year per 440 W panel in Los Angeles and about 807 kWh in Palmdale (20° roof, facing south, 14% system losses).
How much power does it lose on a hot roof?
With γ = −0.29 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15% below the STC rating.
How many panels fit on one string?
With the Tesla 1538000-xx-y (max DC 600 V, MPPT from 60 V, datasheet) in Los Angeles the calculator gives 3–14 panels per string (Voc at 2 °C = 42.2 V, Vmp at 74 °C cell = 27.5 V). Final design must follow the inverter manual and NEC 690.7.
What does the warranty cover?
25 years on the product and 30 years on performance: at least 87.4% after 30 years (manufacturer datasheet).
Has this panel been reliability-tested?
This exact series is not in published PVEL Top Performer tables; Hyundai Energy Solutions was named a Top Performer in 5 Scorecards (2017–2025).
What fire rating does it have?
UL 61730 fire rating Type 29 per datasheet.
Who installs it in Southern California?
Building permits name this series 8 times (Nov 2025 – Oct 2026). The most active licensed installers are Homelink Solar, Option One Solar.
Sources
California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
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, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Nov 2025 – Aug 2026); City of Palmdale (Nov 2025 – Feb 2026); City of Chula Vista (Oct 2026); City of Huntington Beach (Jan 2026). Equipment matched from permit descriptions by model number.
Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).
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