Step 1:

How many kilowatt-hours (kWh) does your home/location use per month?

(This value is usually printed on your electric bill. Entering your annual average gives even more useful results. If you don't have a bill, or don't know your consumption, please use our Load Calculator to go through the steps to determine this value.)

What portion of your electricity usage (your "load") do you want to produce with a solar electric system?

You can adjust this portion by entering a percentage number below (don't bother typing the % sign).

Step 2:

You need to determine the average number of sun hrs per day.

Step 3:

The total wattage of Solar Panels that you need is:

This value takes into account losses due to system inefficiencies.

Step 4:

How many solar panels do you need? That depends on the panel you choose.

Select the wattage of the panel you're interested in, and see the results below:

5 10 20 40 50 60 65 70 75 80 85 90 100 110 120 130 135 140 145 150 155 165 170 175 180 185 190 195 200 205 210 215 224 225 235 239 240 245 250 255 260 265 270 275 280 285 290 295 300 310 315 320 325 330 335 340 345 350 355 360 365 370 375 380 385 390 395 400 watts per panel

Find the solar panel that fits your needs here.

You will need for a total of watts.

You will need a On-Grid inverter that can handle watts.

Browse our full line of On-Grid Inverters.

Is your electricity consumption so high that a solar electric system seems far out of reach? Don't despair, our Experts can help you find other solutions that may help.

Now that you have sized up the system that fits your needs, call our Experts at and let them help you find the exact products for your system.

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