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:
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 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
- Regular price
- $4,725.00
- Sale price
- $4,725.00
- Regular price
-
$5,906.25
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![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](http://shopsolarkits.com/cdn/shop/files/K0196.png?v=1772732801&width=80){kind=small}
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
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"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
"The whole process was seamless. From ordering to installation, everything was straightforward. Our electricity bill has dropped significantly!"
"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
"We compared prices everywhere and this was by far the best deal. The quality of the panels is top-notch and installation guidance was superb."
"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
"Amazing experience from start to finish. The team was incredibly helpful and the system is performing beyond expectations. Couldn't be happier with our decision."
"The whole process was seamless. From ordering to installation, everything was straightforward. Our electricity bill has dropped significantly!"
"Best investment we've made for our home. The customer support is outstanding — they walked us through every step of the setup process."
"We compared prices everywhere and this was by far the best deal. The quality of the panels is top-notch and installation guidance was superb."
"Great product and even better customer service. They helped us design the perfect system for our needs. Highly recommend to anyone considering solar."
"From the free proposal to the final install, everything exceeded our expectations. We're producing more energy than we consume most months!"
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Frequently Asked Questions
Find the answers to some of the most common questions customers have before placing their order.
Yes. Our team can help you choose the right solar kit based on your goals, power needs, and location. We provide personalized guidance before and after your purchase at no additional cost.
Many of our customers complete the majority of installation themselves using our diagrams and support resources. For final electrical connections, a licensed electrician may be required depending on local codes.
While we do not directly install systems, we can help connect you with qualified local professionals and provide technical documentation to support your installer.
We stand behind our products. If you have specific questions about returns, eligibility, or specific product conditions, you can learn more in our help center linked below.
All components are backed by manufacturer warranties. In addition, our team provides free lifetime technical support to assist you throughout the life of your system.
Yes! We offer a variety of flexible payment plans to fit any budget. Options include monthly financing with competitive interest rates, and some plans require no money down. Apply during checkout and get approved in minutes.
If you're ready to place your order, you can go ahead and checkout online right now. If you have questions, our friendly team of solar experts are happy to assist and can take your order over the phone. If you're interested in financing, you will find the application at checkout online. So whatever is best for you, we are happy to accommodate.
Our team works hard to process all orders within 24-48 hours. Most products ship directly to your door using the quickest, most cost effective ground shipping services depending on size. You’ll receive tracking details and delivery coordination as soon as your order ships. Our average shipping times are anywhere from 3-7 days.
You’ll have direct access to our support team via phone, email, and chat. Whether it’s setup guidance or troubleshooting years down the road, we’re here to help.
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