BigBattery Batteries

BigBattery Solar Batteries: 48V and 72V Lithium Storage for Home, RV and Fleet

BigBattery builds solar batteries in sealed, ruggedized enclosures rather than open server-rack cases, which is why the brand shows up in RVs, boats, golf carts and outdoor wall installs as often as in garages. This collection gathers the BigBattery lineup sold here alongside the EG4 wall-mount units that BigBattery distributes, so you can compare a compact 5.12kWh RV battery, a 16kWh home wall unit and a 72V high-voltage pack for carts and equipment on one page.

Six products are listed, from $1,580 for the 5.12kWh HUSKY 2 to $3,750 for the 16kWh EG4 All-Weather. Four are in stock; the PUMA 48V 6kWh NMC and the RHINO 2 14.34kWh are currently sold out. All in-stock units are LiFePO4 and all carry a stated cycle rating or warranty term.

How to choose a BigBattery unit

• Where it lives. A battery bouncing down a highway needs vibration resistance and a sealed case. The HUSKY 2 INV 48V Lithium Battery 5.12kWh 100Ah has an IP65/NEMA 4X enclosure, closed-loop inverter communication and a 12-year warranty, and it is the pick for RV, van and marine builds.
• System voltage. Home inverters run at 48V; golf carts, airport ground support and resort fleets often run 72V. The BigBattery 72V RAPTOR 2 High Voltage Battery 7.68kWh is a direct lead-acid replacement for that class of equipment and should not be confused with a house battery.
• Capacity in one box. For home backup, the EG4 48V WallMount 16kWh Indoor Self-Heating Battery delivers 12.86kWh recommended usable and 200A continuous discharge from a single unit, with UL9540A listing and Auto-ID setup.
• Indoor or exposed. If the wall is outside, choose the EG4 48V WallMount 16kWh 314Ah All-Weather Battery, rated IP67 and 10,000 cycles with an LCD touchscreen on the front.

Popular picks in this collection

Sizing tips

• Start with daily watt-hours. A van with a 12V fridge, lights and laptops uses 1 to 2kWh a day, so one 5.12kWh HUSKY 2 covers two or three days without sun. A house on essentials uses 8 to 12kWh, which is why the 16kWh wall units exist.
• Run the Solar Kit Calculator with your appliances and ZIP code before choosing; it sizes battery, inverter and panels together and prevents buying storage you cannot refill.
• Match the voltage to the inverter or motor controller. A 72V RAPTOR 2 will not work with a 48V hybrid inverter, and vice versa.
• Plan for cold. The indoor EG4 unit heats itself so it can accept charge below freezing; unheated packs must be kept above 32°F while charging.
• If you need more than 16kWh, parallel a second identical unit rather than mixing models; the EG4 Auto-ID feature is built for that.

Frequently asked questions

Are these solar batteries for sale compatible with non-BigBattery inverters? The HUSKY 2 INV and the EG4 wall units use closed-loop communication with common 48V hybrid inverters. Send us your inverter model and we will confirm the protocol before you order.

What is the difference between the PUMA and the other 48V units? The PUMA 48V 6kWh uses NMC chemistry for a smaller footprint, while the HUSKY 2, RHINO 2 and EG4 units are LiFePO4. The PUMA and RHINO 2 are sold out right now; contact us for restock timing.

Can I use the RAPTOR 2 for home backup? No. It is a 72V pack built for golf carts and industrial equipment. For a house, pick one of the 48V wall-mount units.

Every unit ships free to the mainland US from brand partner warehouses, usually within a few business days, with 30-day returns. If you are comparing solar power batteries for sale across formats, call us and we will narrow it to the one that fits your inverter.