Big Battery ETHOS 3x Expansion Kit - K0699
REVOLUTIONIZING RESIDENTIAL ESS! BigBattery’s 48V ETHOS systems are here, and this 15.36kWh Expansion Kit is the ideal solution for upgrading your current ETHOS System in your home or office. Please note that this Expansion Kit does not include a Control Box, and these 3 stackable battery modules (up to 16 total per Control Box) can be connected in parallel to your ETHOS Control Box to complete an energy storage system that fits your specific power needs.
This kit comes with the 3 ETHOS battery modules, a rack base, and each power and communication cable needed to easily connect your additional batteries to your existing ETHOS System.
Whether you’re looking to ensure emergency backup power is always available, or you’re looking to outfit your home with a powerful solar system, the ETHOS ensures reliable, efficient power delivery day in and day out, allowing you to save on utilities, or get rewarded for giving back to the grid through net metering programs and other tax incentives. Take control of your home’s power and shop the 48V ETHOS & ETHOS Expansion Kits today!
Included
3 × 48V ETHOS 5.12kWh Stackable Battery Module
1 × ETHOS RACK BASE
1 × Ethos Parallel Comm Cable 4.9 ft (1500mm)
2 × Ethos Parallel Power Cable 4.9 ft (1500mm)
What our Experts Think
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High‑current 24 V lithium charging — Delivers up to 30 A output, meaning faster and more efficient charging for 24 V LiFePO₄ battery banks compared with lower‑amp chargers.
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Weatherproof IP65 design — Dust‑tight and water‑resistant housing makes it rugged enough for outdoor, off‑grid, marine, or vehicle installations without worry.
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Stable, reliable power delivery — Engineered to maintain consistent, clean output, protecting sensitive lithium battery cells and extending battery life.
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Simple installation & use — Plug‑and‑play setup with clear connections makes it easy for DIYers and professionals alike.
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Built‑for versatility — Works well with a variety of 24 V lithium systems, making it a solid choice for solar, RV, boat, or backup power chargers.
Q&A
Q: What is the BigBattery 24 V 110 V AC 30 A IP65 Weatherproof Lithium Charger (29.2 V DC) — PWS014?
A: A heavy-duty, weather-resistant 24 V lithium battery charger that delivers up to 30 A at 29.2 V DC from a standard 110 V AC outlet — ideal for charging compatible 24 V LiFePO₄ battery banks.
Q: What environments is it designed for?
A: IP65 weatherproof rating allows safe use outdoors or in dusty, wet, or rugged conditions.
Q: What are its power and connection specifications?
A: Input: 110 V AC; Output: 29.2 V DC at up to 30 A; high efficiency (~93%); Anderson-style connector for quick battery hookup.
Q: Which batteries is this charger compatible with?
A: Specifically designed for 24 V lithium battery systems requiring a 29.2 V charging profile.
Q: What are the main benefits?
A: Fast and efficient 30 A charging, rugged IP65 all-weather design, compact and portable, and easy plug-and-play connection — suitable for off-grid setups, RVs, trailers, and outdoor battery stations.
Q: Is it suitable for outdoor and mobile applications?
A: Yes — weather-resistant build and Anderson connector make it ideal for garages, workshops, trailers, RVs, and other outdoor battery charging setups.
Q: What safety features are included?
A: Over-current, over-voltage, over-temperature, and short-circuit protection to ensure safe charging and prolong battery life.
Maintenance Tips
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Install the charger in a dry, well-ventilated area to maintain optimal 24V charging performance and prevent overheating.
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Inspect cables and connectors regularly for wear, corrosion, or looseness to ensure safe and stable operation.
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Clean the exterior with a soft, dry cloth; avoid water or solvents despite the IP65 rating.
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Avoid exposure to direct sunlight, extreme temperatures, or prolonged moisture to extend charger lifespan.
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Disconnect the charger when not in use for extended periods to protect internal components.
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Ensure the charger is used with compatible lithium batteries to maintain efficiency and prevent damage.
