Ten kits built on EG4, one inverter across the whole range. For the cabin, the shop, the barn, the piece of land the poles never reached. Every price on this page is the price — there is no configurator that quietly adds a thousand dollars at the end.
Why the same 18kPV inverter on an eight-panel kit as a twenty-four? Because it is the one that carries the UL9540 listing with these batteries, and because it takes 18 kW of panels — so the small kit is not a dead end. Add panels later and the inverter you already own still covers it.
Off-grid is sized by what you run in a day and how many quiet days you want behind it — not by a percentage of a utility bill, because there isn't one. Tell us the loads and we will size it with you rather than sell you the next tier up. Building and electrical permits still apply where you are; there is simply no utility interconnection to wait on.
These attach to a system we install. A Powerwall is warranted only when a certified installer commissions it, so unlike the EG4 kits above it is not something we will sell you to fit yourself.
Included by default in every installed quote — this shelf listing is for adding one to a system you already have. 13.5 kWh usable, 11.5 kW of backup. $11,500, or $10,500 on a system over 10 kW — where the Powerwall's own inverter replaces a second one you would otherwise buy.
A second 13.5 kWh on the same inverter — 27 kWh in total. It runs the same house twice as long, not a bigger one. Needs a Powerwall to expand.
Grid-tied systems are priced per watt off your actual roof, so they start on the design tool rather than the shelf. Build it and it lands in this same basket.
Design my roof →