The NEXUS 2 is a 51.2V LiFePO4 off-grid storage battery rated at 314Ah, delivering approximately 16kWh of usable capacity. It's built for whole-home backup and off-grid systems that need sustained, high-current output plus room to grow through parallel expansion.
Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Why This Matters
314Ah at 51.2V works out to roughly 16kWh of stored energy. In practical terms, that's enough to run a refrigerator, well pump, and general household circuits for an extended stretch before the battery needs a recharge — actual runtime depends on your load profile and inverter efficiency. The 140A continuous discharge rating means it can support multiple simultaneous loads without tripping the BMS, and the 270A peak rating covers momentary surge demand from compressor start-up or well pump inrush.
Battery Characteristics
Chemistry: LiFePO4 (Lithium Iron Phosphate). This chemistry is inherently more thermally stable than standard lithium-ion and does not use lead, acid, or gel electrolyte. The NEXUS 2 is a stackable, compact-form-factor unit designed for off-grid and home backup installs, not for cranking or starter applications.
Wiring & Configuration Limits
The NEXUS 2 supports parallel expansion of up to 15 units, providing up to 241kWh of total capacity per inverter. It communicates via RS485, CAN, and RJ45 ports for integration with compatible inverter systems. It is also parallel-compatible with legacy KONG and GRIZ products purchased between 2019 and 2024.
Not for series stacking beyond the manufacturer's stated voltage bus design — this is a 51.2V nominal unit intended for parallel-only capacity expansion within a single-voltage-bus system. Do not mix NEXUS 2 units with lead-acid, AGM, or gel batteries in the same bank. Do not parallel with any lithium product outside the stated KONG/GRIZ (2019-2024) or NEXUS 2 compatibility list. [NEEDS VERIFICATION: maximum series count, if any, for multi-bus inverter setups is not stated in source data.]
Pro-Installer Tip
Paralleling lithium banks without matching state-of-charge across every unit is the fastest way to create cell imbalance and premature BMS lockout — the friction point most installers underestimate. Before connecting a new NEXUS 2 into an existing bank, charge each unit independently to the same voltage and let it rest, then verify pack voltages agree within manufacturer tolerance before joining bus bars. Confirm balance with a shunt-based battery monitor rather than trusting terminal voltage alone. Once integrated, treat this as a lithium bank and plan discharge cycles in the 80-100% DoD range the chemistry is designed for — do not manage it like a 50% DoD lead-acid bank, or you're leaving usable capacity on the table.
Key Benefits
- 314Ah / ~16kWh capacity per unit in a stackable, compact enclosure
- 140A continuous discharge, 270A peak — supports high-demand household loads
- Parallel expansion to 15 units, up to 241kWh per inverter
- Charging protection range from 32°F to 113°F; discharging supported down to -4°F
- RS485, CAN, and RJ45 ports for inverter communication and system monitoring
- Backward parallel compatibility with legacy KONG and GRIZ units (2019-2024)
Technical Table
| Spec | Value |
|---|---|
| Voltage | 51.2V |
| Capacity | 314Ah |
| Energy Capacity | 16kWh |
| Chemistry | LiFePO4 |
| Max Continuous Discharge | 140A |
| Peak Discharge | 270A |
| Charging Temperature Range | 32°F to 113°F |
| Discharging Temperature Range | Down to -4°F |
| Max Parallel Units | 15 |
| Max Capacity Per Inverter (paralleled) | 241kWh |
| Communication Ports | RS485, CAN, RJ45 |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
The NEXUS 2 is compatible and parallel-able with existing KONG and GRIZ products purchased between 2019 and 2024. It is designed to integrate with inverter systems supporting RS485, CAN, or RJ45 communication protocols.
It is NOT a starter or cranking battery. It is NOT intended for use with standard lead-acid chargers — use only chargers and inverters rated for LiFePO4 charge profiles and voltage windows. It does NOT ship pre-paralleled with an inverter; inverter and additional NEXUS 2 or compatible legacy units are not included with a single-unit purchase. Charging below 32°F without the unit's built-in thermal management engaged is not supported by the manufacturer's stated range — confirm operating conditions before installation in unheated spaces.
FAQ
What is the usable capacity of one NEXUS 2 unit?
Each unit is rated at 314Ah at 51.2V, which equals approximately 16kWh of energy capacity.
How many NEXUS 2 units can I parallel together?
Up to 15 units in parallel, for a total of up to 241kWh of capacity per inverter.
Can I mix NEXUS 2 with my existing KONG or GRIZ batteries?
Yes, the NEXUS 2 is parallel-compatible with KONG and GRIZ products purchased between 2019 and 2024.
Does the NEXUS 2 have cold-weather protection?
Yes. It supports charging from 32°F to 113°F and discharging down to -4°F, using smart thermal management.
Can this battery be used to start an engine?
No. This is an off-grid/home backup storage battery, not a starter or cranking battery.
Warranty & Support
Warranty terms and full manufacturer documentation are available in the "Resources (System Manuals and Warranty)" Tab above. If you have questions about parallel configuration or fitment with an existing bank before you order, ask us — we always reply back.
