BigBattery APEX 10K Off-Grid Inverter

Name: BigBattery APEX 10K Off-Grid Inverter
Brand: Big Battery
SKU: INV035
Price: 1680.0 USD
Availability: InStock

BY: Big Battery

SKU: INV035

| Availability: In Stock

$1,850.00

$1,680.00

You Save: $170.00

Found A Better Price?

Share it with us now and we will beat it. Get the best deal online, guaranteed!

Live Chat With an Expert

Estimated Delivery Between

and .

Order within to get it by the earliest date.

Order within

to get it by the earliest date.

Authorized Big Battery Dealer

Free & Fast Shipping From US Warehouses

Easy 30-Day Returns & Price Beat Guarantee

Lifetime Expert Support

BigBattery APEX 10K Off-Grid Inverter

The BigBattery APEX 10K Off-Grid Inverter is a powerful hybrid inverter built for dependable off-grid energy systems. Delivering split-phase 120/240V pure sine wave power, it supports both solar and generator inputs for continuous energy independence. Designed to pair seamlessly with modern LiFePO₄ battery banks, the APEX 10K includes 80A pass-through capability, installer-friendly bottom wiring, and a rugged outdoor-ready enclosure—making it ideal for cabins, homesteads, and remote properties that demand reliable power.

BigBattery APEX 10K Off-Grid Inverter Features

6.5kW Hybrid Off-Grid Power – Reliable energy independence

Delivers 6.5kW continuous output with split-phase 120/240V capability for demanding off-grid applications.

Solar & Generator Compatibility – Flexible energy inputs

Supports both solar arrays and generator charging to ensure uninterrupted power availability.

Pure Sine Wave Output – Clean, appliance-safe electricity

Provides stable, utility-grade power suitable for sensitive electronics and essential appliances.

80A Pass-Through Capability – Power large loads

Allows high-capacity power transfer to run heavy appliances and critical systems smoothly.

Installer-Friendly Design – Easy system integration

Features bottom-entry wiring and durable outdoor-ready enclosure for simplified installation.

BigBattery APEX 10K Off-Grid Inverter Applications

Off-Grid Homes – Power cabins, homesteads, and remote properties.
Solar Energy Systems – Convert solar power into reliable household electricity.
Backup Power Systems – Maintain essential loads during outages.
Remote Worksites – Deliver dependable power where grid access is unavailable.
Energy Independence Projects – Build scalable off-grid or hybrid energy systems.

What's Included

Everything you need is included with your product.

1x APEX 10K Off-Grid Inverter

User Manual

Warranty

5-Year Warranty

BigBattery APEX 10K Off-Grid Inverter Specifications

Inverter output

Specification	Details
Rated Output Power	10,000W
Surge Capacity (Peak Power)	20,000W
Rated Output Voltage	120/240 Vac (single-phase/split-phase)
Load capacity of Motors	6 HP
Rated Frequency	50/60Hz
Output Wave	Pure sine wave
Switching Time	10ms(typical value)

Battery

Specification	Details
Battery Type	Lithium-ion battery/lead-acid battery/user-defined battery
Rated Battery Voltage	48V
Voltage Range	40~60Vdc
Max. Solar Charging Current	200A
Max. Grid/Generator Charging Current	120A
Max. Hybrid Charge Current	200A

Solar Input

Specification	Details
No. Of MPPT	1+1
Max. Input Power	5,500W + 5,500W
Max. Input Current	22A + 22A
Max. Open Circuit Voltage	550Vdc+550Vdc
MPPT Voltage Range	125~450Vdc

Grid/Generator Input

Specification	Details
Input Voltage Range	65~140Vac
Input Frequency Range	50/60Hz
Bypass Overload Current	63A
A/C Inputs	1 Input - Grid or Generator
THD (V)	<5%

Efficiency

Specification	Details
Max. Efficiency	99.9%
MPPT Tracking Efficiency	92%
Parallel Capacity	Up to 6 Units (More than 3 units in parallel can form a three-phase output)

General Data

Specification	Details
Dimension	28.46 x 17.64 x 5.91 Inches
Weight	62 lbs
Protection Degree	IP20 Indoor Only
Temperature	14 - 131°F, >113°F Derate
External Module (Optional)	Wi-Fi/GPRS
Certificate	UL1741/RoHs/EN61000-6-1/EC61000-6-3/FCC Part15 ClassB/IEC62109-1/IEC62109-2
Noise	<60dB
Cooling Method	Intelligent fan
Warranty	5 years
Communication Integrated Circuit Breaker	RS485/CAN/USB/Dry Contact Utility/Load/Battery/PV

Frequently-Asked Questions

Can the APEX 10K run a full off-grid home?

Yes. With 10kW output and split-phase 120/240V, it can power many residential off-grid systems depending on load demand.

Does this inverter support generator charging?

Yes. The inverter accepts generator input as well as solar input for flexible energy management.

What type of power output does it produce?

It delivers pure sine wave electricity, which is safe for sensitive electronics and household appliances.

Is the system compatible with lithium batteries?

Yes. It is designed to work seamlessly with modern LiFePO₄ battery banks.

Manual

Shipping & Easy Returns

Shipping is FAST & FREE across the US. Read our full Shipping Policy here.

We offer market leading Easy 30 Day Returns. Read more about our Returns Policy here.

Why Buy From Us

We get it. You've got a lot of choices when it comes to online retailers. Here's why we think you should shop with us at Off-Grid Source.

Free Shipping: Absolutely no hidden charges, ever.
Guaranteed Best Prices: If you find a lower price elsewhere, we'll match it.
30-Day Easy Returns: Not Happy with your product? Return it, no questions asked.
Great Customer Service: It's rare to get a real person these days, but with us, you always will. Have questions? Call us at +1 (877)-556-3347.

FAST & FREE SHIPPING

From US-Based Warehouse

30-DAYS EASY RETURNS

Yes, Really.

GUARANTEED BEST PRICES

Find a Better Price? We’ll Match It.

GREAT CUSTOMER SERVICE

Call Us: (+1) 877-556-3347

Our Customers Tell It Better Than We Do

Excellent 4.9/5

Trusted By 10,000+ Customers. See All Reviews.

They Stood By Me

I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!

Bruce D.

Awesome Service!

I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.

Jennene A.

Real Person, Honest Service.

I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.

Ray B.

Easy Return

I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!

Roger V.

Totally Off Grid.

I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.

Jeff S.

Great Product! Fast Shipping

We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!

Jason

Excellent Customer Service

Very fast response times. Very professional. I highly recommend!

Ray W.