EG4 Solar Power Kits

EG4 Solar Kit Sizing: Matching Inverter Count to Battery Capacity

An EG4 solar kit here means a pre-matched energy storage system: EG4 hybrid inverters paired with a 48V LiFePO4 battery bank, wired for closed-loop communication and sold as one part number. You add the panels and the electrician. These kits are for houses and larger cabins that want real backup or full off-grid operation, not for a camper. The two families are BigBattery ETHOS stackable modules with EG4 18kPV inverters, and EG4's own PowerPro and WallMount batteries with 12000XP V2 or FlexBOSS21 inverters.

The collection holds 18 kits, from the EG4 WallMount 48V 16kWh Indoor Battery ESS with FlexBOSS21 at from $7,092 to the 92.16kWh ETHOS system with three 18kPV inverters at from $32,000. Every ETHOS kit is UL 9540 certified and carries a 12-year battery warranty.

How to choose an EG4 solar system kit

• Inverter count sets output and PV. One 18kPV gives 12kW continuous and 18kW of solar input. Two give 24kW and 36kW. Three give 36kW three-phase and 54kW of PV. Most single-family homes are fine on one; add a second for a shop, an EV charger and central AC at once.
• Battery kWh sets autonomy. The ETHOS 48V 20.48kWh + 1 x EG4 18kPV (four modules, from $8,684) covers an evening and overnight for a typical home. The ETHOS 48V 40.96kWh + 1 x EG4 18kPV doubles that on the same inverter for from $13,088.
• Grid-tied or off-grid. The WallMount 16kWh + FlexBOSS21 kit is built as a grid-tied system with up to 21kW of solar across three MPPT trackers. The EG4 PowerPro 12kW 28.7kWh 48V Battery Backup at from $8,685 is configured off-grid with two all-weather 280Ah batteries.
• Stackable vs wall-mount. ETHOS modules stack on the floor, so adding capacity later means adding a module. PowerPro and WallMount batteries hang on a wall, indoors or outdoors depending on the model.

Popular picks in this collection

Sizing tips

• Start in the Solar Kit Calculator. It takes your appliances and ZIP code and returns battery, inverter and panel targets you can line up against these kits.
• Buy panels to fill the PV input. An 18kPV accepts 18kW of solar; a 6kW array on it leaves most of that unused and slows recovery after a cloudy day.
• Three-inverter ETHOS kits deliver 120/208V three-phase. Confirm your home is split-phase 120/240V before ordering one; most residences want the one- or two-inverter versions.
• Plan floor space for ETHOS stacks. The 92.16kWh kit is 18 modules in three towers.
• Budget for the electrician, a transfer or backup panel, and permits. Kits arrive as hardware, not as a turnkey install.

Frequently asked questions

Do these kits include eg4 batteries and an eg4 inverter, or do I buy them separately? Both come in the box, already matched. The ETHOS kits pair BigBattery modules with EG4 18kPV inverters; the PowerPro and WallMount kits pair EG4 batteries with EG4 inverters.

Can I expand an eg4 solar power system later? Yes. ETHOS modules stack, and the 18kPV supports multiple inverters in parallel, so a one-inverter kit can grow into a two-inverter system as budget allows.

Is this an eg4 solar kit with panels included? No. Panels are sold separately so you can size the array to your roof and climate. Tell us your PV plan and we will confirm it fits the kit's MPPT limits.

Every EG4 kit ships free to the mainland US from brand partner warehouses, usually within a few business days, with 30-day returns. Call and we will size inverter count and battery capacity for your house.