Solaria Solaria PowerXT-400R-PM-AC

Name: Solaria Solaria PowerXT-400R-PM-AC
Brand: Solaria

With a built-in IQ7A-72-2-US microinverter. Power classes 395–420 W in the CEC list.

CEC listed · Jun 1, 2020UL 1741AC module · built-in microinverter

Power class

Power (STC)400 WCEC nameplate
Efficiency≈20.2%calculated from area
%/°C Pmax−0.429CEC listing test
PTC / STC91%PTC 364 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 4 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
Solaria PowerXT-395R-PM-AC	395 W	50.70	9.78	42.13	9.38	≈19.9%	359 W	Jun 1, 2020
Solaria PowerXT-400R-PM-AC	400 W	51.10	9.82	42.40	9.41	≈20.2%	364 W	Jun 1, 2020
Solaria PowerXT-410R-PM-AC	410 W	51.70	9.87	43.20	9.50	≈20.7%	374 W	Jun 1, 2020
Solaria PowerXT-420R-PM-AC	420 W	52.40	9.94	43.80	9.60	≈21.2%	383 W	Jun 1, 2020

≈ efficiency = Pmax ÷ CEC-listed area 1.98 m².

Built-in microinverter

CEC PV Module List (Oct 7, 2026) · NLR SAM inverter library · Cali-Graf calculation

DC module insideSolaria PowerXT-395R-PM
MicroinverterIQ7A-72-2-US
Microinverter AC output290 W ACNLR SAM inverter library
DC/AC ratio1.38Pmax ÷ microinverter AC rating

The string calculator does not apply: each panel has its own microinverter, wired as AC branch circuits.

Heat & cold behaviour

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

	CEC listing test
Pmax coefficient γ	−0.429 %/°C
Voc coefficient β	−0.327 %/°C
Isc coefficient α	+0.052 %/°C
Operating cell temperature	NOCT 46.7 °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
395 W	280 W	38.12 V × 7.35 A	79.1 W	100%
400 W	282.7 W	38.36 V × 7.37 A	79.9 W	100%
410 W	290.8 W	39.08 V × 7.44 A	82.2 W	100%
420 W	297.9 W	39.63 V × 7.52 A	84.2 W	100%

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

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	670	12,067	6.08
Palmdale	1,835	734	13,212	6.69
Chula Vista	1,696	678	12,211	6.11
Huntington Beach	1,643	657	11,830	5.89
Riverside	1,696	678	12,211	6.21
Santa Clarita	1,724	690	12,413	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 Solaria Solaria PowerXT-400R-PM-AC?

Calculated from the panel area (1.98 m²): about 20.2% for the 400 W class. 400 W over 1.98 m² equals about 202 W per square meter.

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

PVWatts v8 with typical-year weather gives about 670 kWh per year per 400 W panel in Los Angeles and about 734 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.429 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 22.2% below the STC rating.

What microinverter is built into the Solaria Solaria PowerXT-400R-PM-AC?

The CEC listing names IQ7A-72-2-US paired with the Solaria PowerXT-395R-PM DC module; the microinverter is rated 290 W AC.

Sources

California Energy Commission — Solar Equipment Lists, PV Module 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.
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).