BigBattery NEXUS 2 Battery + APEX-10K Inverter | 16 kWh | Off-Grid Home ESS System

Product Summary: Meet the APEX-10K off-grid hybrid inverter engineered for true energy independence. Delivering split-phase 120/240 V at 50/60 Hz with clean, pure sine-wave output, APEX pairs flawlessly with modern LiFePO₄ banks and accepts both solar and generator inputs for seamless, all-day autonomy. An 80A pass-through keeps large appliances and critical loads humming, while wide operating temps and an outdoor-ready enclosure mean reliable performance in real-world conditions. Installer-friendly bottom-entry wiring and smart protections round out a system that’s rugged, efficient, paired with our 15kWh NEXUS battery, ready to power your cabin, homestead, or remote residences to deliver the ultimate source of energy independence. 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. Battery: Covered by a 12-Year Limited Warranty Inverter: Covered by a 5-Year Limited Warranty Introducing The APEX Inverter Series 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. Whole-Home Split-Phase Power Delivers clean, pure sine-wave electricity to run larger appliances and essential circuits with confidence. Ideal for cabins, homesteads, and off-grid homes that need true 120/240V performance. Solar Ready Set-Up Designed to accept both solar and generator inputs on APEX-6.5K so you can stay powered day and night. When sunlight dips, your generator can seamlessly keep the system charging and your loads running. Off-Grid Reliability Installer-friendly bottom-entry wiring and built-in protections help keep your setup clean, safe, and dependable for any remote residences. Inputs vary on both inverters, read the specification sheet for more information on inputs between both inverters. Go Big On Power The APEX inverter series & NEXUS battery kit paired together is the ultimate solar set up for all off-grid enthusiasts, whether its a cozy log cabin, modest tiny home or a vast ranch, this ESS was designed to ensure your energy independence, protect yourself from outages & blackouts and stay powered. APEX-6.5K INVERTER INPUTS APEX-10K INVERTER INPUTS INVERTER INPUTS APEX-6.5K APEX-10K Grid yes yes Load yes yes Generator yes yes* BAT – yes yes BAT + yes yes PV yes yes Parallel Connection yes yes USB yes yes CT yes no WiFi yes yes RS485/CAN yes yes Dry Contact yes yes *For the APEX-10K, single AC input supports either grid or generator (not simultaneously).