This kit pairs two BigBattery Husky 2 lithium batteries with a Growatt 3K inverter, wired for 48V off-grid use. It's built as a bundle — batteries plus inverter — rather than a single battery, so you get a working power system out of the box instead of parts you have to spec separately.
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 Kit
BigBattery builds its Husky line as LiFePO4 packs designed for 48V systems. This kit combines two of those batteries with a Growatt 3K inverter, positioned by the manufacturer as a lead-acid replacement for 48V applications. The data provided for this listing does not include individual battery Ah/Wh capacity, cycle life, BMS discharge limits, dimensions, weight, or inverter output specs — those numbers must be confirmed on the manufacturer resources tab before you order, not assumed from the title.
Battery Characteristics
- Chemistry: LiFePO4 (Lithium Iron Phosphate) — as indicated by "Husky" product line naming; not independently confirmed in supplied data [NEEDS VERIFICATION]
- System voltage: 48V (two batteries configured for 48V operation per kit title)
- Group Size / physical dimensions: [NEEDS VERIFICATION]
- Inverter: Growatt 3K (model number, output wattage, and full spec sheet not included in supplied data) [NEEDS VERIFICATION]
Wiring & Configuration Limits
This kit is sold as a matched pair of two Husky 2 batteries wired for 48V, paired with one Growatt 3K inverter. Beyond that pairing, no additional series/parallel expansion limits, maximum battery count, or BMS communication details were included in the supplied data.
Not confirmed in this listing: maximum parallel battery count beyond the two included, compatibility with other inverter brands, and whether additional Husky 2 units can be added to this same inverter. Do not assume expandability without confirming against the manufacturer's resources tab.
Pro-Installer Tip
Mixing a new lithium bank with an old lead-acid charge controller or inverter setting is the most common way a Husky-based kit gets damaged in the first month. Lithium packs need charge profiles set for LiFePO4 — not AGM or flooded defaults — or the BMS will cycle into protection mode repeatedly, shortening pack life through repeated low-voltage cutoffs. Before commissioning, verify the Growatt 3K's battery-type setting is set to lithium/LiFePO4 and confirm charge voltage against the manufacturer spec sheet. Use a shunt-based battery monitor to track state of charge across both packs so you catch any cell imbalance early rather than after a lockout. Lithium chemistry in this class typically supports deep discharge to 80–100% DoD, but confirm the exact DoD rating for the Husky 2 on the resources tab before setting your inverter's low-voltage disconnect.
Key Benefits
- Bundled solution: two batteries plus inverter sized together, reducing compatibility guesswork between separately-sourced components
- LiFePO4 chemistry (indicated by product naming) generally offers longer cycle life and lighter weight than lead-acid — exact cycle life figure not provided in this data set [NEEDS VERIFICATION]
- Positioned by the manufacturer as a lead-acid replacement across RV, marine, food truck, commercial vehicle, off-grid, emergency backup, and mobile power applications
Technical Table
| Spec | Value |
|---|---|
| System Voltage | 48V |
| Chemistry | LiFePO4 (indicated by naming) [NEEDS VERIFICATION] |
| Battery Quantity (this kit) | 2x Husky 2 |
| Inverter | Growatt 3K |
| Capacity (Ah/Wh) | [NEEDS VERIFICATION] |
| Cycle Life | [NEEDS VERIFICATION] |
| Max Continuous Discharge (A) | [NEEDS VERIFICATION] |
| Operating Temp Range | [NEEDS VERIFICATION] |
| Dimensions | [NEEDS VERIFICATION] |
| Weight | [NEEDS VERIFICATION] |
| Terminal Type | [NEEDS VERIFICATION] |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
Per the manufacturer, this kit is designed for 48V applications, positioned as a lead-acid replacement for use in Class A, B, and C RVs, camper vans, food trucks, commercial vehicles, off-grid systems, emergency backup, and mobile power setups.
NOT confirmed: compatibility with 12V, 24V, or 36V systems. This kit is described for 48V use only.
NOT included: mounting hardware, cabling, solar charge controller, or additional batteries beyond the two Husky 2 units listed — confirm exact kit contents against the manufacturer resources tab before install.
Charging requirements: standard lead-acid chargers are NOT recommended for LiFePO4 packs. Use a charge source/inverter configured for lithium/LiFePO4 charge profiles. Cold-weather charging protection (low-temp disconnect or internal heating) is not specified in the supplied data [NEEDS VERIFICATION] — do not charge below freezing until this is confirmed.
FAQ
Q: What voltage system is this kit designed for?
A: This kit is designed for 48V applications, combining two Husky 2 batteries with a Growatt 3K inverter.
Q: What battery chemistry does the Husky 2 use?
A: The product naming and lead-acid replacement positioning suggest LiFePO4 (Lithium Iron Phosphate), but this is not explicitly confirmed in the supplied specification data. Confirm chemistry on the manufacturer resources tab before purchase.
Q: Can I add more batteries to this kit later?
A: Expansion limits beyond the two included Husky 2 units are not specified in this listing. Confirm maximum parallel/series configuration with the manufacturer resources tab before adding capacity.
Q: Is this kit compatible with a standard lead-acid charger?
A: No. Lead-acid chargers are not recommended for lithium battery packs. Use a charging source configured for LiFePO4 charge profiles, and verify the Growatt 3K's battery-type setting before use.
Q: What is included in this kit?
A: Two Husky 2 batteries and one Growatt 3K inverter, per the kit title. Cabling, mounting hardware, and additional accessories are not confirmed as included — verify exact contents before ordering.
Warranty & Support
Warranty terms for this kit are not included in the supplied data. Please refer to the "Resources (System Manuals and Warranty)" Tab above for manufacturer warranty details before you order. If you have questions about this kit's configuration or fit for your setup, ask us before you order — we always reply back.
