CALL US TODAY
Open M-F, 9-5 CST
An off-grid solar system costs what it costs for one reason: it has to make and store every watt your property uses, with no grid to lean on. Size it right and you pay for exactly what you need. Oversize it and you spend thousands too much; undersize it and you run out of power on the third cloudy day. This guide gives you the real numbers, how to size a system, and the off-grid kits we carry at Krato Power.
For a complete off-grid kit (panels, inverter, charge controller, and battery), expect a range tied to size:
At Krato Power, complete kits run from $1,399.99 for a 200W Rich Solar kit up to $16,133 for a SunGoldPower 20kW off-grid system. You are buying the matched hardware and sizing it to your needs, which keeps the cost far below a fully installed, contractor-quoted system.
Work from your daily energy use, in kilowatt-hours. The two rules of thumb:
Solar array (kW) = your daily kWh, divided by the usable sun hours in your area, with headroom for losses.
Battery bank (kWh) = your daily kWh, times the number of days you want to run without sun.
An average US home uses about 30 kWh a day. In a 4 to 5 sun-hour climate, that points to roughly a 7kW to 9kW array and a 30kWh-plus battery bank for true whole-home off-grid with a day of backup. A cabin using 5 kWh a day needs a fraction of that.
The panels decide how fast you refill; the battery decides how long you last. Size both.
Match total battery capacity to your daily use times your days of autonomy. For a 30 kWh-per-day home that wants one full day of backup, that is about 30 kWh of battery, or roughly six 5kWh modules. Want two days through a storm? Double it. LiFePO4 gives you near-full usable capacity, so you do not have to oversize the way old lead-acid banks did.
Prices are current at Krato Power. Browse them all in the Solar Panel Kits collection.
Need more storage than a kit includes? Add 48V Server Rack Batteries, or match a larger inverter from 48V Inverters.
At Krato Power, a complete 20kW SunGoldPower off-grid kit with a 30.72kWh lithium battery and panels runs about $16,133. Price scales mostly with battery capacity and panel count, so a smaller system costs proportionally less.
Start from your daily kWh. Divide by your local sun hours for the array size, and multiply by your days of backup for the battery size. A typical whole-home off-grid build lands around 7kW to 10kW of panels and 20kWh to 30kWh-plus of battery.
For almost any single-family home, yes, including heavy loads, with margin for shorter winter days. The key off-grid constraint is having enough battery to ride through the night and cloudy days.
On essentials (around 500 watts), roughly a day. On a full household load, far less. Runtime is capacity divided by load, so size the bank to the loads you actually plan to run during an outage or overnight.
Tell the Krato Power team your average daily energy use and how many days of backup you want, and we will size an off-grid kit, battery, and inverter to match. Call 888-855-7286 or start in the Solar Panel Kits collection.
This is general information, not electrical or professional advice. Off-grid and whole-home installs should be done by a licensed electrician per local code.