Description
Description
Introducing The APEX Inverter Series
Meet the BigBattery APEX Off-Grid Hybrid Inverter Series (6.5K & 10K)—engineered for true energy independence with two power-class options to match your build. Both models deliver split-phase 120/240V at 50/60 Hz with clean, pure sine-wave output, pairing seamlessly with modern LiFePO₄ battery banks for stable, efficient performance. Designed for real-world autonomy, APEX supports solar and generator inputs so you can stay powered day and night, season after season.
Built to handle demanding loads, the APEX Series features an 80A pass-through to keep large appliances and critical circuits running smoothly, while wide operating temperatures and an outdoor-ready enclosure provide dependable performance in harsh conditions. With installer-friendly bottom-entry wiring and intelligent protections baked in, APEX is a rugged, efficient, and practical backbone for cabins, homesteads, remote residences, and off-grid properties—delivering a streamlined path to reliable, all-day power.
| Inverter Inputs | APEX-6.5K | APEX-10K |
|---|---|---|
| Grid | Yes | Yes |
| Load | Yes | Yes |
| Generator | Yes | Yes* |
| BAT – | Yes | Yes |
| BAT + | Yes | Yes |
| PV | Yes | Yes |
| Parallel Connection | Yes | Yes |
| USB | Yes | Yes |
| CT | Yes | No |
| WiFi | Yes | Yes |
| RS485 / CAN | Yes | Yes |
| Dry Contact | Yes | Yes |
Specifications
| Specification | APEX-6.5K | APEX-10K |
|---|---|---|
| Brand | BigBattery | BigBattery |
| Model | APEX-6.5K | APEX-10K |
| GTIN / UPC | 00199874185712 | 00199874999463 |
| Rated Output Power | 6,500 W | 10,000 W |
| Max Output Power | 13,000 VA | 20,000 VA |
| Rated Output Voltage | 120/240 Vac (single-phase / split-phase) | 120/240 Vac (single-phase / split-phase) |
| Motor Load Capacity | 4 HP | 6 HP |
| Rated Frequency | 50/60 Hz | 50/60 Hz |
| Output Wave | Pure Sine Wave | Pure Sine Wave |
| Switching Time | 10 ms (typical) | 10 ms (typical) |
| Battery Compatibility | Lithium-ion / Lead-acid / User-defined | Lithium-ion / Lead-acid / User-defined |
| Rated Battery Voltage | 48 V | 48 V |
| Battery Voltage Range | 40–60 Vdc | 40–60 Vdc |
| Max Solar Charging Current | 140 A | 200 A |
| Max Grid / Generator Charging Current | 80 A | 120 A |
| Max Hybrid Charge Current | 140 A | 200 A |
| Solar Input | ||
| MPPT Trackers | 1 + 1 | 1 + 1 |
| Max Solar Input Power | 5,000 W + 5,000 W | 5,000 W + 5,500 W |
| Max Input Current | 18 A + 18 A | 22 A + 22 A |
| Max Open Circuit Voltage | 550 Vdc + 550 Vdc | 550 Vdc + 550 Vdc |
| MPPT Voltage Range | 125–450 Vdc | 125–450 Vdc |
| AC Input | ||
| Input Voltage Range | 65–140 Vac | 65–140 Vac |
| Input Frequency Range | 50/60 Hz | 50/60 Hz |
| Bypass Overload Current | 40 A | 63 A |
| AC Inputs | 2 (Grid & Generator) | 1 (Grid or Generator) |
| Efficiency & Performance | ||
| Max Efficiency | 99.9% | 99.9% |
| MPPT Tracking Efficiency | 93% | 92% |
| Parallel Capacity | Up to 6 units (3+ units can form 3-phase output) | Up to 6 units (3+ units can form 3-phase output) |
| Physical Specifications | ||
| Dimensions | 25.51 × 16.14 × 5.51 in | 28.46 × 17.64 × 5.91 in |
| Weight | 48 lbs | 62 lbs |
| Protection Rating | IP20 (Indoor) | IP20 (Indoor) |
| Operating Temperature | 14–131°F (derate above 113°F) | 14–131°F (derate above 113°F) |
| Noise | <60 dB | <60 dB |
| Cooling Method | Intelligent Fan | Intelligent Fan |
| Connectivity & Features | ||
| Communication | RS485 / CAN / USB / Dry Contact | RS485 / CAN / USB / Dry Contact |
| Optional Modules | Wi-Fi / GPRS | Wi-Fi / GPRS |
| Integrated Circuit Breakers | Utility / Load / Battery / PV | Utility / Load / Battery / PV |
| Certifications | UL1741, RoHS, EN61000-6-1, EN61000-6-3, FCC Part 15 Class B, IEC62109-1, IEC62109-2 | Same |
| Warranty | 5 Years | 5 Years |
Protection Features
| Protection Type |
|---|
| 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 overload protection |
Overload Protection Behavior
| Load Condition | Response |
|---|---|
| 102%–110% load | Error reported; output shuts off after 5 minutes |
| 110%–125% load | Error reported; output shuts off after 10 seconds |
| >125% load | Error reported; output shuts off after 5 seconds |
| Recovery | Output automatically restores after 3 minutes (up to 5 overload events before manual restart required) |
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