BigBattery NEXUS + APEX 10K Battery Storage Bundle [15kWh–45kWh] | Indoor Only | 10,500W PV Input / 10,000W AC Output | 5-Year Inverter + 12-Year Battery Warranty

BigBattery NEXUS + APEX 10K Battery Storage Bundle [15kWh–45kWh] | Indoor Only | 10,500W PV Input / 10,000W AC Output | 5-Year Inverter + 12-Year Battery WarrantyMeet the BigBattery NEXUS + APEX 10K Off Grid ESS Bundlean expandable 48V energy storage system built around a split phase 120 240V hybrid inverter and modular LiFePO4 battery capacity. Choose 1, 2, or 3 NEXUS batteries to scale from 15kWh to 45kWh of storage. Key Features & Benefits Split phase 120 240Vac output (50 60Hz) Powers true split phase loads and essential circuits with clean AC power. 10,000W rated inverter output (pure sine wave) Runs

Meet the BigBattery NEXUS + APEX-10K Off-Grid ESS Bundle—an expandable 48V energy storage system built around a split-phase 120/240V hybrid inverter and modular LiFePO4 battery capacity. Choose 1, 2, or 3 NEXUS batteries to scale from 15kWh to 45kWh of storage.

Key Features & Benefits

• Split-phase 120/240Vac output (50/60Hz) — Powers true split-phase loads and essential circuits with clean AC power.

• 10,000W rated inverter output (pure sine wave) — Runs demanding appliances and tools with stable, utility-like waveform.

• 20,000VA max output power — Adds headroom for higher-demand situations (within system limits).

• Dual MPPT solar charging (1 + 1 MPPT) — Lets you manage two PV input channels for flexible array design.

• Solar + grid/generator charging support — Multiple ways to recharge so you can keep power available beyond sunlight hours.

• Parallel expandable (up to 6 inverter units) — Grow your system over time; 3+ units can form three-phase output (per spec).

• NEXUS LiFePO4 chemistry — Built for safety, long service life, and efficient energy storage.

• NEXUS integrated BMS + safety features — Includes integrated BMS with quadruple safety redundancies, plus self-heating and integrated aerosol fire suppression (battery features).

• Modular battery growth (up to 15 NEXUS in parallel) — Scale storage up to 225kWh per inverter (15 batteries in parallel).

Specs in a Glance: 

APEX-10K Off-Grid Hybrid Inverter (48V)

• Rated output power: 10,000W

• Max output power: 20,000VA

• Output voltage: 120/240 Vac (single-phase / split-phase)

• Frequency: 50/60Hz

• Waveform: Pure sine wave

• Switching time: 10ms (typical)

• Rated battery voltage: 48V (40–60Vdc range)

• Max solar charging current: 200A

• Max grid/generator charging current: 120A

• MPPTs: 1 + 1

• Max PV input power: 5,000W + 5,500W

• Max PV input current: 22A + 22A

• Max PV open-circuit voltage: 550Vdc + 550Vdc

• MPPT voltage range: 125–450Vdc

• AC input voltage range: 65–140Vac

• AC inputs: 1 input (Grid or Generator)

• Protection degree: IP20 (indoor only)

• Operating temperature: 14–131°F (derate above 113°F)

• Dimensions: 28.46 × 17.64 × 5.91 in

• Weight: 62 lbs

• Communications: RS485 / CAN / USB / Dry contact

• Certifications: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2

• Warranty: 5 years

NEXUS 48V 15kWh LiFePO4 Battery (each)

• Usable energy: 15kWh

• Nominal voltage: 51.2V (48V system)

• Capacity: 300Ah (16S1P)

• Chemistry: LiFePO4

• Max continuous discharge current: 140A

• Max continuous power: 7.6kW

• Peak discharge current: 270A (1s)

• Max charge current: 140A

• Charge temp range: 32°F to 113°F

• Discharge temp range: -4°F to 113°F

• Protection rating: IP54

• Installation: Indoor, floor-standing

• Dimensions: 19.7 × 27.5 × 15.7 in (500×700×400 mm)

• Weight: ~315 lbs

• Max connections: 15 in parallel (up to 225kWh)

• Communications: RS485 / RJ45 / CAN

• Warranty: 12 years

What’s Included:

• 1× BigBattery APEX 10K off-grid hybrid inverter

• Choose: 1× / 2× / 3× BigBattery NEXUS 15kWh LiFePO4 battery

Ideal For

• Off-grid cabins, homesteads, and remote residences needing true 120/240V split-phase

• Scalable energy storage builds where you want 15kWh steps up to 45kWh

• Systems that need solar charging + optional grid/generator charging paths

• Indoor mechanical/utility spaces (battery is indoor floor-standing; inverter IP20 indoor-rated)

User Manual / Documents:

• BigBattery 48V 15kWH NEXUS LiFePO4 Battery Spec Sheet
• BigBattery 48V 15kWH NEXUS LiFePO4 Battery User Manual
• BigBattery APEX 10K Off-Grid Hybrid Inverter Spec Sheet
• BigBattery APEX 10K Off-Grid Hybrid Inverter User Manual