BigBattery
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Product Summary:
The BigBattery APEX 10K + NEXUS™ Off-Grid System is a complete, high-performance energy solution engineered for true energy independence. Combining the powerful APEX 10K hybrid inverter with the NEXUS 48V 15kWh LiFePO₄ battery, this system delivers reliable, efficient energy for homes, cabins, and remote installations.
The APEX 10K provides split-phase 120/240V pure sine-wave output at 50/60Hz, supporting both everyday appliances and high-demand loads. Designed to pair seamlessly with modern lithium battery systems, it accepts solar and generator inputs for continuous, all-day operation. With an 80A pass-through, large appliances and critical loads run smoothly without interruption.
Built with advanced battery protection, safe lithium technology, and U.S.-supported engineering, this system is ideal for off-grid living, backup power, and energy security in demanding environments.
Ships From: Texas, USA
Warranty: 12 Years (Battery), 5 Years (Inverter)
Support: Lifetime USA-Based Tech Support
Meet the BigBattery APEX Off-Grid Hybrid Inverter Series (6.5K & 10K)—engineered for true energy independence with two power-class options to match your build. Both models deliver split-phase 120/240V at 50/60 Hz with clean, pure sine-wave output, pairing seamlessly with modern LiFePO₄ battery banks for stable, efficient performance. Designed for real-world autonomy, APEX supports solar and generator inputs so you can stay powered day and night, season after season.
Built to handle demanding loads, the APEX Series features an 80A pass-through to keep large appliances and critical circuits running smoothly, while wide operating temperatures and an outdoor-ready enclosure provide dependable performance in harsh conditions. With installer-friendly bottom-entry wiring and intelligent protections baked in, APEX is a rugged, efficient, and practical backbone for cabins, homesteads, remote residences, and off-grid properties—delivering a streamlined path to reliable, all-day power.
Integrated & Optimized System (Closed-Loop Communication):
Expandable Design:
A powerful, rugged off-grid energy system built for reliability, flexibility, and long-term independence – backed by U.S.-based support you can trust.
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At BigBattery, we stand behind the quality and reliability of our products. Our warranty coverage is designed to give you confidence and peace of mind with every purchase.
For full details on coverage, terms, and conditions, please visit our Policy Page
Our stackable, compact design comes with all the hardware you need for a straightforward setup, letting you get your off-grid system up and running efficiently in less time. Engineered for reliability in any off-grid environment, it delivers consistent power when you need it most.
With 300Ah of capacity, 140A max continuous discharge, and peak support up to 270A, NEXUS handles high-demand loads with ease. NEXUS’s smart thermal management enables charging from 32 °F to 113 °F and discharging down to -4 °F, making it a true all-weather energy solution.
NEXUS supports parallel expansion up to 15 units, offering 225kWh total capacity per inverter. With RS485, CAN, and RJ45 communication ports, it’s ready to integrate seamlessly into new or existing inverter systems—ensuring full system transparency, automation, and control.
