APEX inverters from BigBattery are 48V off-grid hybrid solar inverters built to run a home or cabin from batteries and panels. This collection lists two models, the APEX-6.5K at 6,500W and the APEX-10K at 10,000W, with prices from $1,490. They suit owners building a custom 48V battery-based system who want one unit to handle solar input, battery charging, and AC output. Your main choice is wattage, so add up the loads you may run at the same time and leave some headroom before picking 6.5K or 10K. Compare both specs below, or email us for help matching an inverter to your battery bank.

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  • Apex 6.5K 6,500W 48V off-grid hybrid solar inverter, front view A gray and white BigBattery APEX 6.5K battery inverter featuring a digital display and control panel, mounted against a plain light background—its sleek design echoes modern interfaces styled with popular font families such as IBM Plex Sans or customized via CSS variables.
    APEX-6.5K 6,500W Off-Grid Hybrid Solar Inverter | 48V
    Save $130
    BigBattery

    APEX-6.5K 6,500W Off-Grid Hybrid Solar Inverter | 48V

    48V Hybrid Inverter · Dual AC Input — Grid + Generator 6,500 Watts of Off-Grid Power, With Solar, Grid, and Generator Running Together The APEX-6.5K converts stored DC power from...
    $1,490.00
    $1,620.00 $1,490.00
    • 6500W output
    • 5-yr warranty

    In stock · ships in 1-4 days

    Sale
  • Apex 10K 10,000W 48V off-grid hybrid solar inverter, front view A gray and white rectangular device labeled “APEX-10K” with a small display screen, a handle on the side, and vented panels, is set against a plain white card background. The crisp labeling uses IBM Plex Sans, complementing the modern design of BigBattery’s Apex10k device.
    APEX-10K 10,000W Off-Grid Hybrid Solar Inverter | 48V
    Save $150
    BigBattery

    APEX-10K 10,000W Off-Grid Hybrid Solar Inverter | 48V

    48V Hybrid Inverter · Solar + Generator Ready 10,000 Watts of Whole-Property Power, Built to Run Without the Grid The APEX-10K converts stored DC power from a 48V lithium battery...
    $1,680.00
    $1,830.00 $1,680.00
    • 10.0kW output
    • 5-yr warranty

    In stock · ships in 1-4 days

    Sale

APEX Solar Inverter Range: 6.5kW or 10kW for an Off-Grid 48V System

A solar inverter is the part of an off-grid system that turns the DC stored in your battery bank into the 120V/240V split-phase power your house, cabin or shop actually uses. The APEX units here are hybrid inverters: they take solar in, charge a 48V lithium bank, run the loads, and keep a grid or generator input wired in as backup. That is the layout most homesteads and remote residences end up with once they outgrow a plug-in power station.

The collection holds two models. The APEX-6.5K delivers 6,500W and lists at $1,490; the APEX-10K delivers 10,000W and lists at $1,680. Both are 48V, both are in stock, and both ship free to the mainland US.

APEX-6.5K 6,500W off-grid hybrid solar inverter, 48V

How to choose between the two APEX inverters

  • Continuous watts. Add up the loads that can run at the same time. A cabin with a fridge, well pump, lights, microwave and a window air conditioner usually stays under 6,500W, so the APEX-6.5K 6,500W Off-Grid Hybrid Solar Inverter fits. A full house with electric water heating, a dryer or a heat pump pushes toward the APEX-10K 10,000W Off-Grid Hybrid Solar Inverter.
  • AC inputs. The 6.5K keeps a dedicated grid connection and a dedicated generator connection side by side, so a property with an unreliable utility line and a backup generator can use both without rewiring. The 10K is solar and generator ready with grid as an option.
  • Battery bank behind it. Both need a 48V lithium bank. Price the batteries at the same time; a 10kW inverter on a single 5kWh battery will be starved on the discharge side.
  • Price difference. Only $190 separates the two. If your load list is anywhere near 6,500W, the 10K is the safer buy because inverters run cooler and last longer well below their rating.

Popular picks in this collection

Product Key numbers Best for Price from
APEX-6.5K Hybrid Inverter 6,500W, 48V, 120/240V, grid + generator inputs Cabins, homesteads, workshops $1,490
APEX-10K Hybrid Inverter 10,000W, 48V, 120/240V, solar + generator ready Whole-property off-grid homes $1,680
APEX-10K 10,000W off-grid hybrid solar inverter, 48V

Setup and usage tips

  • Size the whole inverter solar system, not just the inverter, with the Solar Kit Calculator. Enter your appliances and ZIP code and it returns inverter watts, battery kWh and panel watts together.
  • Pair with 48V LiFePO4 batteries only. Server rack, wall-mount and stackable 51.2V modules from our batteries collection are the usual match; these are 48V units and do not take 12V or 24V banks.
  • Plan the generator input from day one, even if you do not own a generator yet. Cloudy weeks happen, and both APEX models are built to accept one.
  • Mount the inverter in a dry, ventilated space close to the batteries to keep DC cable runs short. Long runs at 48V waste power and cost more in copper than most people expect.
  • Hire a licensed electrician for the AC side. Split-phase 240V wiring into a main panel is not a DIY job in most jurisdictions.

Frequently asked questions

Do I need the grid to use an APEX inverter? No. Both are off-grid inverters. Grid or generator input is there as a backup charging source, not a requirement.

Can the APEX-10K run a whole house? It is designed for whole-property loads at 10,000W, including 240V appliances. The limit in practice is battery capacity and solar array size, which you size to your consumption.

Is the output clean enough for electronics and motors? Yes. Both models produce pure sine wave 120/240V split-phase, the same waveform as a utility line, so well pumps, compressors and computers run normally.

Both inverters ship free to the mainland US in a few business days, with 30-day returns. Call us with your load list and battery plan and we will confirm which model and how many batteries you need.