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sonnen SCORE-Pxx 10–20 kWh · 4.8 kW · Lithium Iron Phosphate · 2 configurations
UL 9540 UL 1741 SB CEC listed · Jun 13, 2022
Nameplate energy 10–20 kWh Continuous power 4.8 kW Warranty 10 years Chemistry Lithium Iron Phosphate Compare Datasheet (PDF) ≈ 20 h of backup at a 1 kW average load Facts checked Oct 14, 2026 · sources at the bottom
Models Capacity Solar Installation Warranty Safety Grid Specs Compare Documents Q&A
Overview CEC Energy Storage System List SCORE-Pxx: 10–20 kWh nameplate energy; 4.8 kW continuous; lithium iron phosphate; 10 years warranty.
Models & configurations CEC Energy Storage System List · 2 listings
Capacity & power CEC Energy Storage System List Nameplate energy (CEC) 10–20 kWh Rated power (CEC) 4.8 kW Max continuous discharge (CEC) 4.8 kW Full-power discharge time about 4.2 h at full power Round-trip efficiency (datasheet) 85.4% Chemistry Lithium Iron Phosphate Grid connection 240 V Battery voltage (DC, nominal) 102 V
Charging from solar in Southern California NLR PVWatts v8 · Cali-Graf calculation · CEC Energy Storage System List 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).
Installation location indoor
Safety listings CEC Energy Storage System List UL 9540 (energy storage system) Certified by Intertek Certificate date & edition Nov 4, 2023 · Ed. 2 : 2020 UL 9540A (fire propagation test) Yes Other standards on datasheet UL 1741, IEEE 1547, UL 9540A, UL 9540, UL 1973, UN 38.3, FCC 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 UL 1741 SB (IEEE 1547-2018) Yes UL 1741 SA (Rule 21) Yes CSIP (IEEE 2030.5) Yes (with conditions) JA12 declaration (Title 24) No Last CEC update Mar 1, 2024 Monitor Key Data scheduling Yes Communication ethernet Manufacturer website sonnen-batterie.com
Compare with similar batteries CEC Energy Storage System List Same segment, similar capacity; each row from the same sources.
Documents manufacturer documents
Questions & answers How much energy does the sonnen SCORE-Pxx store? 10–20 kWh nameplate, per the California Energy Commission list.
Can the SCORE-Pxx be installed outdoors? Installation location per the datasheet: indoor.
What warranty does the SCORE-Pxx have? Is the SCORE-Pxx UL 9540 certified? Yes — the CEC list shows UL 9540 certification (certified by intertek).
Sources California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates. sonnen — datasheet Download spec sheet . sonnen — document library on the manufacturer’s website (links above). NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach. Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).
