BigBattery
BigBattery NEXUS 2 48kWh Off-Grid Kit — 3 Batteries + 1 APEX-10K Inverter
BigBattery NEXUS 2 48kWh Off-Grid Kit — 3 Batteries + 1 APEX-10K Inverter
SKU: K0340
- Regular price
- $10,815.00
- Regular price
- Sale price
- $10,815.00
- Unit price
- per
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- Warranty information is listed in this product's details.
OFF-GRID POWER & ENERGY STORAGE
48kWh of storage. A clearly defined off-grid kit.
This 48kWh off-grid bundle pairs 3 NEXUS 2 batteries with 1 APEX-10K inverter. Use the exact quantities and operating limits below to plan your system.
Capability that matters to your project
Storage capacity you can plan around
3 × 16.08kWh provides 48.24kWh of published stored energy. Actual usable energy and runtime depend on reserve settings, load, temperature and conversion losses.
Indoor floor-standing design
Plan an accessible utility area with a level base, service clearances and a safe handling route. Each battery weighs approximately 315 lb.
Battery communications
RS485 and CAN interfaces support communication with compatible inverters. Confirm cable pinout, battery protocol and firmware before commissioning.
Split-phase output
10kW rated output per inverter supplies 120/240V loads. Balance the 120V circuits and check motor startup demand separately.
Two solar trackers
Two MPPT channels accept up to 11kW of utilized PV per inverter. Design each string to the voltage and current limits in the Specifications tab.
AC charging and backup sources
Use the approved AC-input arrangement to supplement solar charging. APEX-10K has one shared AC input for either grid or generator.
What’s included
- 3 × NEXUS 2 batteries
- 1 × APEX-10K inverter
Confirm the exact accessory packing list with Torven Power. Images illustrate the configuration; loose cables, communications accessories and mounting hardware are included only when itemized for the order.
Plan the installation
Solar panels, array racking, installation labor and permits are selected separately. Your installer must specify conductors, disconnects, grounding, overcurrent protection and any required transfer equipment. Match battery discharge capability and charging limits to the inverter settings.
Power and energy are different: this kit stores 48.24kWh. The 1 inverter has a combined nameplate rating of 10kW; this is not a guaranteed battery-only system output. Actual output is limited by the battery bank, wiring, temperature, available input and the approved parallel design.
These are off-grid inverter configurations. AC grid input for charging or bypass does not establish permission to export power to a utility. A battery-and-inverter bundle also does not establish whole-system UL 9540 certification.
Frequently asked questions
Can I add another inverter later?
Parallel expansion must follow the exact model manual, compatible hardware and firmware, approved communications wiring and commissioned settings. Confirm the design before adding units.
How long will this battery bank run my loads?
Dividing 48.24kWh by a constant 1kW load gives 48.24 hours before reserve and conversion losses. This is a sizing illustration, not a runtime promise. Actual usable energy depends on settings and operating conditions.
Are solar panels included?
No. Select panels, racking and site-specific electrical equipment separately.
What warranty applies?
The NEXUS 2 battery has a 12-year limited manufacturer warranty. The inverter has a 5-year limited manufacturer warranty. Registration, installation and exclusions follow the current written manufacturer terms.
How is availability confirmed?
Contact Torven Power for current supplier stock, dispatch timing and delivery requirements for this exact SKU before planning installation.
Get help choosing the right configuration
Send your load list, existing equipment and delivery ZIP code to Torven Power, or start with the Power Planner.
System specifications
| Listing SKU | K0340 |
|---|---|
| Configuration | 3 × NEXUS 2 batteries; 1 × APEX-10K inverter |
| Battery bank energy | 48.24kWh published / 48kWh marketed |
| Battery bank capacity | 942Ah at 51.2V |
| Battery quantity | 3 |
| Inverter quantity | 1 |
| Rated AC output per inverter | 10kW |
| AC output | 120/240V split phase |
| Nominal battery system | 48V class |
| Inverter protection | IP20 / indoor installation |
| Inverter warranty | 5-year limited manufacturer warranty |
NEXUS 2 battery specifications
| Exact battery SKU | F-NXUS2-48161-G1 |
|---|---|
| Nominal voltage | 51.2V (48V class) |
| Capacity per battery | 314Ah / 16.08kWh |
| Chemistry | Lithium iron phosphate (LiFePO4) |
| Cell configuration | 16S1P |
| Operating voltage range | 48–57.6V |
| Communications | RS485 / RJ45 / CAN |
| Installation | Indoor, floor-standing |
| Protection rating | IP54; indoor installation specified by manufacturer |
| Approximate weight | 315 lb per battery |
| Battery warranty | 12-year limited manufacturer warranty; written terms apply |
APEX-10K inverter specifications
| Battery operating range | 40–60V DC |
|---|---|
| Solar input power | 11,000W (5,500W per MPPT; current specification sheet) |
| MPPT trackers | 2 |
| MPPT operating range | 125–450V DC |
| Maximum PV open-circuit voltage | 550V DC per MPPT |
| PV input current | 22A per MPPT |
| Maximum solar charging current | 200A |
| Maximum AC charging current | 120A |
| AC inputs | One AC input: grid OR generator, not both simultaneously |
| Dimensions | 28.46 × 17.64 × 5.91 inches |
| Weight | 62 lb |
| Communications | RS485 / CAN / USB / dry contact |
Manuals and product documents
- NEXUS 2 product information
- NEXUS 2 specification sheet
- APEX-10K product information
- APEX-10K spec sheet
- APEX-10K user manual
The delivered model label and current installation manual control. Confirm hardware revision before applying settings. Specifications are subject to change.
Why Buy From Us
Shop with confidence at Torven Power.
Free shipping, 30-day returns and a Torven team ready to help.
Ordering Information
Shipping & Returns
Free shipping in the Lower 48: Standard delivery includes residential delivery and liftgate service when needed, with no fuel surcharge or order minimum. We send tracking when available, and the freight carrier contacts you to schedule delivery.
30-day returns: Contact Torven within 30 days of delivery and we will help you get started. See the return policy for item condition and return-shipping details.
Delivery problem? We are here to help. Contact Torven with your order number and photos. We will handle the claim coordination with the supplier and carrier and help arrange a resolution. Return shipping is covered for approved damage, defect or incorrect-item returns.
BigBattery
BigBattery NEXUS 2 48kWh Off-Grid Kit — 3 Batteries + 1 APEX-10K Inverter
Torven Power Planner
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