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28.8 kWh
Battery moduleKowint Energy

Kowint Energy S4006-SS

28.8 kWh · 15 kW · Lithium Iron Phosphate

UL 1973CEC listed · Oct 2, 2023
  • Nameplate energy28.8 kWh
  • Continuous power15 kW
  • ChemistryLithium Iron Phosphate

Overview

CEC Battery List

S4006-SS: 28.8 kWh nameplate energy; 15 kW continuous; lithium iron phosphate.

Capacity & power

CEC Battery List

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation
CityDecemberJune
Los Angeles9 kW5.3 kW
Palmdale8.3 kW4.8 kW
Chula Vista7.7 kW5.5 kW
Huntington Beach8.4 kW5.8 kW
Riverside8.6 kW5.1 kW
Santa Clarita8.5 kW5 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 Battery List

Compare with similar batteries

CEC Energy Storage System List
BatteryEnergyContinuous powerChemistryWarrantySoCal permits
BYD BATTERY-BOX PREMIUM HVL (US)12–32 kWh7.5–20 kWLithium Iron Phosphate10 years1
GoodWe SECU-S Series11.5–18.4 kWh2.9–23 kWLithium Iron Phosphate——
Growatt APX HV Battery US27 kWh2.5–12 kWLithium Iron Phosphate10 years—
Tigo Energy GO Battery (US)27 kWh2.5–12 kWLithium Iron Phosphate10 years—
EG4 Electronics PP-100A14-18K1-LP20.5 kWh10.4–12 kWLithium Iron Phosphate10 years—
EG4 Electronics PP-100A14-18K1-LL20.5 kWh10.4–12 kWLithium Iron Phosphate10 years—
Same segment, similar capacity; each row from the same sources.

Sources

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