AmpBox 28.6 kWh LiFePO4 Battery — Product Overview & Full Specifications
The AmpBox 28.6 kWh LiFePO4 battery system is a high-capacity, stackable energy storage solution built for home backup, off-grid installations, RV/marine systems, small commercial use, and EV charging support. It pairs a 48V 16S 200A BMS with a compact enclosure and modern communications (CANBUS / RS485) for monitoring and integration.
Why choose this battery?
- High usable energy for extended backup or off-grid use.
- Robust BMS (48V / 200A) with LCD for status & protection.
- Stackable enclosure design to expand capacity as needs grow.
- Certified for safety and shipping: CE, RoHS, UN38.3, MSDS, ISO (downloads available below).
- CANBUS & RS485 communications for system integration and monitoring.
Quick technical summary
| Nominal Capacity | 28.6 kWh |
|---|---|
| Usable Capacity (example) | ≈ 26.91 kWh (calculated using 97% DoD × 97% inverter efficiency) |
| Nominal Voltage | 48 V |
| BMS | 48V 16S 200A with LCD |
| BMS-rated continuous output | 48 V × 200 A = 9,600 W (9.6 kW theoretical) |
| Cell arrangement | 16S2P (32 LiFePO4 cells) |
| Communications | CANBUS, RS485 |
| Cell dimensions | 208 × 174 × 72 mm |
| Enclosure size | 740 × 440 × 520 mm |
| Package size | 86 × 56 × 72 cm |
| Gross weight | 210 kg (464 lb) |
| Color / Finish | White / Metal |
| Certifications | CE, RoHS, UN38.3, MSDS, ISO |
| Brand | AmpBox |
Usable energy — exact calculation
To estimate real-world usable energy we apply depth-of-discharge (DoD) and inverter efficiency. Using 97% DoD and 97% inverter efficiency, usable energy is:
28.6 kWh × 0.97 × 0.97 = 26.91 kWh usable (≈ 26,910 Wh)
That usable energy is the basis for the runtime examples and sizing guidance below.
Runtime examples — how long will it run?
Below are clear, relatable examples using the usable energy of ≈ 26.91 kWh. Actual times vary with load profile, ambient temperature, inverter efficiency, and system losses.
| Load (example) | Typical wattage | Approx. runtime (hours) |
|---|---|---|
| Central air conditioner (continuous) | 3,500 W | ≈ 7.7 hours |
| Level 1 EV charging (120–140 V, ~10 A) | 1,400 W | ≈ 19.2 hours (adds ~94 miles at 3.5 mi/kWh) |
| Lights & household electronics (average) | 400 W | ≈ 67.3 hours |
| Refrigerator (continuous average) | 150 W | ≈ 179.4 hours (≈ 7.5 days) |
| Power tools (worksite) | 2,000 W | ≈ 13.5 hours |
| Microwave (moderate use) | 1,200 W | ≈ 22.4 hours |
| Sump or well pump | 800–1,000 W | ≈ 26.9–33.6 hours |
| Average home partial load (1.5 kW) | 1,500 W | ≈ 17.9 hours |
EV charging note: Using a conservative estimate of 3.5 miles per kWh, the usable energy (~26.91 kWh) could add roughly 94 miles of electric driving range. Vehicle efficiency varies — high-efficiency EVs may gain more.
BMS, power limits & recommended inverter sizing
The integrated BMS is rated at 200 A on a 48 V system. The theoretical continuous power limit is:
48 V × 200 A = 9,600 W (9.6 kW)
- For sustained AC output, size your inverter and cabling to match the BMS continuous rating and the loads you expect to run simultaneously.
- Allow headroom for inverter startup surges and for the BMS protection behavior. In many installations an inverter with a rated continuous output slightly below or equal to 9.6 kW is common; consult your inverter provider and a qualified installer.
- Always use appropriately rated DC disconnects, fusing/breakers, and wiring sized for continuous 200 A and short-circuit protection per local electrical code.
Communications & integration
The AmpBox supports CANBUS and RS485 for telemetry and system integration:
- Integrate with compatible inverters, charge controllers, or solar charge management systems that accept CAN or RS485 telemetry.
- Monitoring lets you see state-of-charge, voltages, currents, cell balance, and alarm/status messages on the BMS LCD or via a connected controller.
- Consult your inverter/EMS manual for supported protocols and pinouts; if in doubt, reach out to our support team for wiring diagrams and integration advice.
Mechanical, packaging & shipping
| Enclosure size | 740 × 440 × 520 mm |
|---|---|
| Cell dimensions | 208 × 174 × 72 mm |
| Package size | 86 × 56 × 72 cm (34 × 22 × 28 in.) |
| Gross weight | 210 kg (464 lb) |
| Stacking | Stackable design for modular capacity expansion |
Shipping note: Plug-and-play variants typically ship LTL (Lower 48 only). For freight quotes and handling requirements, add item to cart.
Safety, handling & installation best practices
- Do not open or disassemble the battery pack. Repairs or cell-level work must be performed by qualified technicians.
- Do not change BMS passwords or settings unless you are trained; changing critical BMS parameters can lead to misoperation or permanent lockout.
- Install in a protected, ventilated area away from direct sunlight and moisture. Keep the pack off combustible surfaces and provide adequate airflow around the enclosure.
- Use appropriately rated DC wiring, terminals, and circuit protection sized for continuous 200 A and local electrical code requirements; always install a DC fuse/breaker and a proper DC disconnect.
- Follow UN38.3 shipping requirements when transporting cells or packs; see downloadable MSDS and UN38.3 certification documents (link provided below).
Lifecycle & maintenance
LiFePO4 chemistry is known for long cycle life and stable thermal behavior. Typical LiFePO4 cells provide between ~2,000 and 5,000 cycles depending on depth of discharge, charge rates and operating temperature. With moderate use and good thermal control, expect many years of service. Recommended maintenance:
- Periodic visual inspection of enclosure, terminals and cables for corrosion or looseness.
- Keep firmware for compatible inverters/EMS updated and monitor BMS logs for irregularities.
- Store long-term at partial state-of-charge and in a cool, dry place if not in regular use.
Common applications & system examples
This battery works well in a variety of scenarios — below are realistic sample uses and what to expect:
Home backup
Pair with a hybrid inverter for whole-home or partial-home backup. With ~26.9 kWh usable you can run essential circuits for many hours to days depending on load (see the runtime table above). Prioritize critical loads (fridge, lighting, comms) during extended outages to maximize runtime.
Off-grid / cabin power
Combine with a solar array and MPPT charge controller — the stackable design lets you increase days of autonomy by adding additional modules. Use the BMS telemetry to manage charge windows and optimize solar usage.
EV charging support
Use as a buffer for Level 1/Level 2 charging or to provide limited EV charging during outages. At moderate charge rates, the pack can provide many hours of charge or tens of miles of range depending on the vehicle.
Mobile power (RV / marine)
For off-grid mobile setups, this pack supplies long-run power for appliances and electronics. Ensure vibration-resistant mounting and proper marine-grade cabling where appropriate.
Light commercial / worksite
Provide tool and equipment power for off-grid jobsites, or use for peak shaving in small commercial installations.
Downloads & support
- Download Product Datasheet (PDF)
- Download MSDS
- UN38.3 Certificate
- Need integration help? Contact our support team for wiring diagrams, CANBUS pinouts, or freight quotes.
Frequently asked questions
- Can I stack multiple units?
- Yes — the enclosure is designed for stacking to expand capacity. Ensure proper electrical integration and consult our support team for best practices.
- Can these be connected in series for higher voltage?
- Connecting battery systems in series changes voltages and requires careful BMS and inverter compatibility checks — consult a qualified installer before attempting series configurations.
- What warranty is provided?
- Warranty and service terms vary by purchase. See the product page or contact us for full warranty details and registration instructions.
- Do you ship outside the Lower 48?
- Standard shipping options are shown on the product page (Lower 48). For other destinations, contact our sales team for shipping and compliance information.