Illustration · 50 cells

Solar panelSOLVIS

SOLVIS SV50-225 E BC2 Kromatix Bronze

50 cells. 225 W in the CEC list.

CEC listed · Aug 11, 2023UL 61730

Power (STC)225 WCEC nameplate
Efficiency≈13.7%calculated from area
%/°C Pmax−0.397CEC listing test
PTC / STC90.8%PTC 204 W (CEC)

Electrical ratings (STC)

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
SV50-225 E BC2 Kromatix Bronze	225 W	33.61	8.63	27.55	8.20	≈13.7%	204 W	Aug 11, 2023

≈ efficiency = Pmax ÷ CEC-listed area 1.64 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area1.64 m² (17.7 ft²)CEC-listed area
Cells50 cells
Back coverBlack backsheet

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	CEC listing test
Pmax coefficient γ	−0.397 %/°C
Voc coefficient β	−0.290 %/°C
Isc coefficient α	+0.029 %/°C
Operating cell temperature	NOCT 46.6 °C

Vmp coefficient ≈ γ − α (CEC); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

Class	Pmax at NOCT	Vmp × Imp at NOCT	Pmax at 200 W/m²	Low-light efficiency vs STC
225 W	162.9 W	24.61 V × 6.62 A	44.9 W	100%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Certifications

CEC PV Module List (Oct 7, 2026)

UL 61730IEC 61215

UL 61730CEC listing
IEC 61215design qualification on file with CEC · Mar 15, 2023

Inverter compatibility & string sizing

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · NLR PVWatts v8 · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

35.9 V

Voc when cold

per panel

21.8 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

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. β is the CEC-measured coefficient; NEC 690.7 calculations use the datasheet value.

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	3–16
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	4–16
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	5–16
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	11–13

Microinverters (one per panel)

No microinverter in the reference set lists this power class in its recommended module power range.

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

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	377	11,313	6.08
Palmdale	1,835	413	12,386	6.69
Chula Vista	1,696	382	11,448	6.11
Huntington Beach	1,643	370	11,090	5.89
Riverside	1,696	382	11,448	6.21
Santa Clarita	1,724	388	11,637	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.

Questions & answers

How efficient is the SOLVIS SV50-225 E BC2 Kromatix Bronze?

Calculated from the panel area (1.64 m²): about 13.7% for the 225 W class. 225 W over 1.64 m² equals about 137 W per square meter.

How much energy does one panel produce in Los Angeles or Palmdale?

PVWatts v8 with typical-year weather gives about 377 kWh per year per 225 W panel in Los Angeles and about 413 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.397 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 20.6% 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 3–16 panels per string (Voc at 2 °C = 35.9 V, Vmp at 74 °C cell = 21.8 V). Final design must follow the inverter manual and NEC 690.7.

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 — Solis (Ginlong), Tesla (manufacturer documents).
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).