Big Battery | NEXUS and APEX-10K Off-Grid Solar Power System
Big Battery NEXUS and APEX-10K Off-Grid Solar Power System
The Big Battery NEXUS and APEX-10K Off-Grid Solar Power System delivers dependable, high-output energy for homes, cabins, and remote installations. Engineered for complete energy independence, it combines robust power conversion with scalable battery storage to support heavy loads and continuous use. Ideal for off-grid living or backup applications, this system offers efficiency, flexibility, and long-term reliability in a streamlined solution.
KEY FEATURES
- Integrated off-grid power solution designed for residential and remote use
- High-output 10kW inverter supports demanding appliances and equipment
- Split-phase capability for standard household electrical systems
- Scalable battery architecture for future capacity expansion
- Designed for solar, generator, and battery input compatibility
- Engineered for reliable performance in off-grid environments
Specifications
| Section | Details |
|---|---|
| Document Title | APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS |
| Brand | BigBattery |
| Model | APEX-6.5K / APEX-10K |
| Rated Output Power | APEX-6.5K: 6,500W / APEX-10K: 10,000W |
| Max. Output Power | APEX-6.5K: 13,000VA / APEX-10K: 20,000VA |
| Rated Output Voltage | 120/240 Vac (single-phase / split-phase) |
| Load Capacity of Motors | APEX-6.5K: 4 HP / APEX-10K: 6 HP |
| Rated Frequency | 50/60Hz |
| Output Wave | Pure sine wave |
| Switching Time | 10ms (typical value) |
| Battery Type | Lithium-ion battery / lead-acid battery / user-defined battery |
| Rated Battery Voltage | 48V |
| Battery Voltage Range | 40–60Vdc |
| Max. Solar Charging Current | APEX-6.5K: 140A / APEX-10K: 200A |
| Max. Grid / Generator Charging Current | APEX-6.5K: 80A / APEX-10K: 120A |
| Max. Hybrid Charge Current | APEX-6.5K: 140A / APEX-10K: 200A |
| Number of MPPTs | 1 + 1 |
| Max. Solar Input Power | APEX-6.5K: 5,000W + 5,000W / APEX-10K: 5,000W + 5,500W |
| Max. Solar Input Current | APEX-6.5K: 18A + 18A / APEX-10K: 22A + 22A |
| Max. Open Circuit Voltage | 550Vdc + 550Vdc |
| MPPT Voltage Range | 125–450Vdc |
| Grid / Generator Input Voltage Range | 65–140Vac |
| Grid / Generator Input Frequency Range | 50/60Hz |
| Bypass Overload Current | APEX-6.5K: 40A / APEX-10K: 63A |
| AC Inputs | APEX-6.5K: 2 inputs (Grid & Generator) / APEX-10K: 1 input (Grid or Generator) |
| Max. Efficiency | 99.9% |
| MPPT Tracking Efficiency | APEX-6.5K: 93% / APEX-10K: 92% |
| Parallel Capacity | Up to 6 units (more than 3 units in parallel can form a three-phase output) |
| Dimensions (W × H × D) | APEX-6.5K: 25.51 × 16.14 × 5.51 in / APEX-10K: 28.46 × 17.64 × 5.91 in |
| Weight | APEX-6.5K: 48 lbs / APEX-10K: 62 lbs |
| Protection Degree | IP20 (indoor only) |
| Operating Temperature | 14–131°F, derate above 113°F |
| External Module (Optional) | Wi-Fi / GPRS |
| Certifications | UL1741 / RoHS / EN61000-6-1 / EN61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2 |
| Noise Level | <60dB |
| Cooling Method | Intelligent fan |
| Warranty | 5 years |
| Communication Interfaces | RS485 / CAN / USB / Dry contact |
| Integrated Circuit Breaker | Utility / Load / Battery / PV |
| Overload Protection Behavior | Output restores after 3 minutes. After 5 overloads, output shuts down until restart. (102%–110% load): shutdown after 5 min. (110%–125% load): shutdown after 10 sec. (>125% load): shutdown after 5 sec. |
| Protection Features | PV input current limiting, PV over-voltage, PV night reverse current, AC input over/under-voltage, battery over/under-voltage, battery over-current, AC output short-circuit, heat sink over-temperature, inverter overload protection |
Manual & Downloads
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Yes! We are proud to be one of the few online retailers who are authorized retailers for every single product we carry!
Being an authorized retailer means we carry the same warranty as the manufacturer, protecting your purchase!
When Will My Order Ship?
Most orders ship within 1–3 business days. You’ll get a tracking number as soon as it ships via email!
Do We Accept Returns?
Yes absolutely, we have a no-hassle, 30-day return policy on all items! To refer to the full policy, click HERE
Are Products Brand New?
Yes! By default, all products on Solar Guys Pro are 100% brand-new and in perfect condition.
If an item is used or refurbished, it will clearly indicate so in the title of the product as well as the discription.
For example, a used Battery will say:
XYZ Battery | 48V 100AH (REFURBISHED)
If you'd like to confirm, you can always send us a email at info@solarguyspro.com
Orders over $500 include a FREE (Normally $149.99) 80-Page DIY Solar eBook — added automatically at checkout.
Frequently Asked Questions
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