Home Portable Energy Storage

8kWh Whole Home Battery Backup System with 4000W Inverter and 4500W Solar MPPT Input

8kWh Whole Home Battery Backup System with 4000W Inverter and 4500W Solar MPPT Input

The Battery is an all-in-one home battery backup system built for households that need power to keep running when the grid does not. It brings a lithium iron phosphate battery bank, a pure sine wave inverter and a solar charge controller together in one steel cabinet, so a home gets backup storage and solar readiness from a single floor-standing unit instead of a wall of separate components. Around eight kilowatt-hours of storage and four thousand watts of continuous output are enough to carry the essentials of a household — refrigeration, lighting, internet, a pump, a workspace — through a full evening or a long outage.

  • Battery Capacity :

    8038.4Wh
  • Battery Type :

    8* 314Ah
  • Rated Voltage :

    230V, 50/60Hz
  • Rated Power :

    4000W, Pure Sine Wave
  • Battery Cell Lifespan :

    111000cycles@(25℃ ,100%DOD ,0.5P, @70%SOH)
  • Certification :

    UN38.3, MSDS
  • Operating Ambient Temperature :

    Charging:0℃~40°℃/ Discharging:-20°C~40℃/ Storage:-20℃ to 60℃
  • Protection Level :

    IP20
  • AC Output Interface :

    Universal Socket
  • Body Dimensions :

    L500*W230*H801 mm
  • Weight :

    77.5kg
  • Charging time :

    3~4 h
Products Description
 
  1. The system is designed to be forgotten until it is needed. When the grid drops, power transfers in a few milliseconds, quickly enough that computers, network equipment and medical devices keep running without a restart. Output is clean and stable, so motors start smoothly and sensitive electronics behave exactly as they do on mains power. Six independent protection layers guard the battery and the output against voltage, current, temperature and short-circuit faults, and the pack is rated for more than ten thousand charge cycles, so the storage is built to serve the home for decades rather than seasons.
  2. Charging is deliberately flexible. A wide-range solar input accepts a full roof string and refills the battery in a single afternoon, while the grid charger works from weak or unstable supply and covers the days when the sun does not. Housed in a compact, wheeled cabinet for indoor installation in a utility room, garage or basement, the POWER 8 sits between a portable power station and a wall-mounted system that needs permits and permanent wiring — practical backup power, without the installation project.
 Xiamen 9Sun Solar Technology Co., Ltd is located in Xiamen, China's beautiful seaside city, We specialize in design,research and development, producing and sales of solar PV related products. We have an experienced and professional team in research and design of photovoltaic products, persist in the principle of "Quality-oriented'、and "Integrity first", and provide customers with efficient, energy-saving, high-quality products and professional service in a timely manner. A full range of solar mounting systems, including solar ground mounting system, solar roof mounting system, solar farm mounting system, solar carport mounting system, solar floating mounting system, solar ground screw and so on, are provided by 9Sunsolar.

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Product Advantages

  • True 8kWh of LiFePO4 storage. Eight 314Ah LFP cells at 25.6V deliver 8,038Wh — enough to carry a household's essentials through a full night or a multi-hour outage, not just a few hours of lights.
  • 4,000W pure sine wave output. Clean, inverter-grade power for fridges, pumps, power tools, and sensitive electronics — no modified sine wave noise, no motor whine, no risk to medical or network gear.
  • 10ms UPS switchover. In bypass mode the POWER 8 hands over in as little as 10 milliseconds (20ms on home-load mode), so desktops, NAS drives, routers, and CPAP machines never reboot when the grid drops.
  • One cabinet, zero wiring wall. Battery, 4kW inverter and MPPT charger are integrated in a single sheet-metal cabinet — 500 × 230 × 801mm on casters, so it rolls into a utility room, garage corner, or under-stairs nook as one unit.
  • 4,500W of solar input, 3–4 hour recharge. A wide 65–450V MPPT window accepts series strings straight from the roof, and a 2,500W grid charger covers cloudy weeks — from empty to full in 3–4 hours either way.
  • 11,000 cycles to 70% SOH. Rated at 100% depth of discharge, 0.5P, 25°C — roughly 30 years of daily cycling by spec, so the pack is designed to outlast the inverter it ships with.

 Packaging & Delivery
 
 

 FAQ
 
 Q1:Can the POWER 8 run as a home battery backup without solar?
 A1:Yes. The AC input accepts 90–280V at 50/60Hz and charges at up to 2,500W, so the unit works as a grid-charged battery backup system with no panels at all. Solar can be added later to the same MPPT input.
 
 Q2:How long will an 8kWh battery last during a power outage?
 A2:At an average 1,000W of household essentials it runs roughly 7 hours; at 400W (fridge, lights, internet) closer to 18 hours; at the full 4,000W rating about 1.8 hours. Real runtime depends on surge loads such as compressors and pumps.
 
 Q3:Does it switch over automatically when the grid fails?
  A3:Yes. Transfer time is 10ms in UPS bypass mode and 20ms in home-load mode, fast enough that connected electronics will not reboot.
 
 Q4:How much does the POWER 8 weigh, and can one person move it?
 A4:77.5kg net, on four casters. It rolls on a flat floor but should be lifted by two people over thresholds and stairs.
 
 Q5:Where can it be installed?
 A5: Indoors, on a level floor: utility room, garage, basement, under-stairs. IP20 rating means it is protected against solid objects but not water — keep it out of damp or outdoor locations. Charging range 0–40°C, discharge −20–40°C.
 
 
 
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