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61.4 kWh
Home battery systemShanghai PYTES Energy

Shanghai PYTES Energy Pi SxKST

61.4 kWh · 5–8 kW · Lithium Iron Phosphate · direct PV input · 4 configurations

UL 9540CEC listed · Jul 1, 2024
  • Nameplate energy61.4 kWh
  • Continuous power5–8 kW
  • Round trip (AC)92.6%
  • ChemistryLithium Iron Phosphate

Overview

CEC Energy Storage System List

Pi SxKST: 61.4 kWh nameplate energy; 5–8 kW continuous; lithium iron phosphate; accepts solar panels directly (DC-coupled).

Models & configurations

CEC Energy Storage System List · 4 listings
ModelEnergyPowerGrid voltageRound tripCEC listed
Pi S5KST {208V}61.4 kWh5 kW208 V93%Jul 1, 2024
Pi S5KST {240V}61.4 kWh5 kW240 V93%Jul 1, 2024
Pi S8KST {208V}61.4 kWh8 kW208 V93%Jul 1, 2024
Pi S8KST {240V}61.4 kWh8 kW240 V93%Jul 1, 2024

Capacity & power

CEC Energy Storage System List

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation · CEC Energy Storage System List
CityDecemberJune
Los Angeles19.1 kW11.3 kW
Palmdale17.6 kW10.3 kW
Chula Vista16.3 kW11.7 kW
Huntington Beach18 kW12.5 kW
Riverside18.3 kW10.9 kW
Santa Clarita18.1 kW10.7 kW
Solar array size that refills the battery from empty in one average day, before the home uses any of it (NLR PVWatts v8, 20° south roof).

Safety listings

CEC Energy Storage System List
UL 9540 certifies the whole storage system; UL 9540A is the fire-propagation test that fire codes ask for indoors and near walls.

California grid & code compliance

CEC Energy Storage System List

Compare with similar batteries

CEC Energy Storage System List
BatteryEnergyContinuous powerChemistryWarrantySoCal permits
Sol-Ark L3 HVR36.9–55.3 kWh30–60 kWLithium Iron Phosphate10 years7
Sol-Ark L3 HV-xxKWH-xxK36.9–55.3 kWh30–60 kWLithium Iron Phosphate10 years—
Same segment, similar capacity; each row from the same sources.

Questions & answers

How much energy does the Shanghai PYTES Energy Pi SxKST store?

61.4 kWh nameplate, per the California Energy Commission list.

Is the Pi SxKST UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by sgs).

Sources

  1. California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
  2. NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
  3. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).