Homeowners in search of grid independence have another option today with the launch of Anker’s Solix E10 big-ass battery system. It joins companies like Tesla and EcoFlow in offering whole-home backup solutions in the US market meant to counter blackouts and reduce monthly energy bills, or even eliminate them completely.

The base $4,299 E10 system starts with one Power Module and one battery that can keep a few individual appliances running, and scale up to power an entire home. The 110.2-pound inverter is good for a steady 7.68kW output (or 10kW for 90 minutes). It can produce up to 28.8kW (120 LRA) peak when fitted with a single 6kWh battery, or 37.2kW (155 LRA) when configured with two or more batteries — enough to start a 5-ton air conditioner. Combine two E10 sets and you’ve got a system capable of handling 66kW (275 LRA) of surge power.

Combine three maxed out E10 systems to handle up to 27kW of solar input (9kW per unit) and 90kWh of battery storage. For context, the average US home consumes about 889kWh per month, or about 29.2kWh per day, according to the US Energy Information Administration. That means that a maxed out E10 system could run an entire home for three days on battery alone.

For most people, having that much battery capacity available is overkill and very expensive. Instead you can start with a simpler system to only power the most critical circuits. Anker makes this possible in a few ways, and both require professional installation: A new Power Dock electrical panel that gives homeowner’s intelligent control and automatic cutover of up to 12 circuits (200 amps) in less than 20ms, and the simpler Smart Inlet that requires manual intervention.

The E10 ecosystem is also launching with a weather-resistant, tri-fuel Smart Generator 5500 generator that runs on gasoline, propane, or natural gas. It kicks on automatically to keep everything operational when needed and will remind owners when it requires servicing.

Anker’s promising hassle-free, one stop installation services for its E10 Solix. Preorder deals begin today, ahead of official sales starting on February 4th.

The E10 Base System (with one inverter and one battery) is priced from $4,299. That jumps to $4,599 when adding the Smart Inlet Box, or $5,799 if going the Power Dock route. For $7,399 you get the E10 Base System, the Smart Generator, and Power Dock kit.