Big Battery | APEX-6.5K Off-Grid Solar Inverter
Big Battery | APEX-6.5K 6.5kW Off-Grid Solar Inverter | 48V Split-Phase Power System
Engineered for dependable off-grid and backup power, the Big Battery APEX-6.5K delivers robust split-phase output for homes, cabins, and workshops. Its integrated solar charging, high surge capability, and 48V battery compatibility streamline system design while supporting demanding loads. Built for scalability and efficiency, it offers stable performance for renewable, remote, and resilience-focused energy systems.
KEY FEATURES
- Delivers 6.5kW of continuous off-grid power
- Supports 120/240V split-phase for residential loads
- Integrated MPPT solar charge controller
- Compatible with 48V lithium and lead-acid batteries
- Parallel capable for system expansion
- Designed for off-grid, backup, and hybrid applications
Specifications
| Section | Specification | Details |
|---|---|---|
| General | Document title | APEX-6.5K Inverter Specifications |
| General | Brand | BigBattery |
| General | Model | APEX-6.5K |
| General | GTIN / UPC | 00199874185712 |
| Inverter output | Rated output power | 6,500W |
| Inverter output | Max. output power | 13,000VA |
| Inverter output | Rated output voltage | 120/240 Vac, single-phase / split-phase |
| Inverter output | Load capacity of motors | 4 HP |
| Inverter output | Rated frequency | 50 / 60Hz |
| Inverter output | Output wave | Pure sine wave |
| Inverter output | Switching time | 10ms (typical value) |
| Battery | Battery type | Lithium-ion battery / lead-acid battery / user-defined battery |
| Battery | Rated battery voltage | 48V |
| Battery | Voltage range | 40–60Vdc |
| Battery | Max. solar charging current | 140A |
| Battery | Max. grid / generator charging current | 80A |
| Battery | Max. hybrid charge current | 140A |
| Solar input | Number of MPPT | 1 + 1 |
| Solar input | Max. input power | 5,000W + 5,000W |
| Solar input | Max. input current | 18A + 18A |
| Solar input | Max. open circuit voltage | 550Vdc + 550Vdc |
| Solar input | MPPT voltage range | 125–450Vdc |
| Grid / generator input | Input voltage range | 65–140Vac |
| Grid / generator input | Input frequency range | 50 / 60Hz |
| Grid / generator input | Bypass overload current | 40A |
| Grid / generator input | AC inputs | 2 inputs (Grid & Generator) |
| Efficiency | Max. efficiency | 99.9% |
| Efficiency | MPPT tracking efficiency | 93% |
| Parallel capability | Parallel capacity | Up to 6 units; more than 3 units in parallel can form three-phase output |
| General data | Dimensions (W × H × D) | 25.51 × 16.14 × 5.51 inches |
| General data | Weight | 48 lbs |
| General data | Protection degree | IP20 (indoor use only) |
| General data | Operating temperature | 14–131°F, derate above 113°F |
| General data | External module (optional) | Wi-Fi / GPRS |
| General data | Noise | < 60dB |
| General data | Cooling method | Intelligent fan |
| General data | Warranty | 5 years |
| General data | Communication | RS485 / CAN / USB / Dry contact |
| General data | Integrated circuit breaker | Utility / Load / Battery / PV |
| Certification | Certificates | UL1741, RoHS, EN61000-6-1, EN61000-6-3, FCC Part15 Class B, IEC62109-1, IEC62109-2 |
| Overload protection | Overload protection behavior | Output restores after 3 minutes; after 5 overload events, output will be off until inverter restart. 102% < load < 110%: error, output off after 5 minutes. 110% < load < 125%: error, output off after 10 seconds. Load > 125%: error, output off after 5 seconds. |
| Protection features | Protection features | PV input current limiting, PV input over-voltage protection, PV night reverse current protection, AC input over-voltage protection, AC input under-voltage protection, battery over-voltage protection, battery under-voltage protection, battery over-current protection, AC output short-circuit protection, heat sink over-temperature protection, inverter over-load protection |
Manual & Downloads
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XYZ Battery | 48V 100AH (REFURBISHED)
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Frequently Asked Questions
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