Island living. Your power plan.

What would power
your everyday?

Tell us about your home and the things you run. We’ll turn that into a practical starting point for your solar panels, batteries and inverter.

No sign-upAbout 10–15 minutesPrintable report

Step 1 of 4

First, tell us about your place.

Estimates are welcome. No street address or personal contact details are required.

Town or neighborhood Island / location Elevation above sea level (feet)Used to flag equipment altitude limits. It does not predict sunshine. House size (square feet) People living here When is someone usually home? How well is the home insulated? Power situation Describe your home and anything unusualIncluded in your report as context. The calculation uses the numbered inputs and appliance list.

Step 2 of 4

Where will the panels go?

Choose what you observe at your property. Sunshine can vary a lot over short distances in Hawaiʻi.

Your usual weatherPlanning scenarios: 3.5, 4.5 or 2.5 equivalent full-sun hours/day. Not a measured location forecast. Shade on the panel area Mounting location Roof material Main panel direction Roof pitch Clear mounting area (square feet)Usable area after obstacles. We add a rough spacing allowance; actual layout may need more. Known site solar hours, if availableEquivalent full-sun hours, not hours of daylight. Use a conservative month for off-grid planning. Optional roof photosUp to 3 JPG, PNG or WebP photos, 8 MB each. Kept locally for your report; no automated roof or structural analysis.

Don’t know the roof details? Continue with estimates. Your report will show the approximate space needed.

Step 3 of 4

What do you want to power?

Add every appliance you want on solar or backup. Choose an appliance to start with typical values, then adjust them. For cycling equipment, hours mean equivalent full-power hours.

Add an appliance

A refrigerator may be plugged in for 24 hours but its compressor cycles. The starter value is 150 watts × 8 equivalent hours. The first three appliance rows are editable examples—remove any you do not use. A/C starter values are rough estimates—measured kWh are much better.

Have a utility bill or measured energy use?

Electricity used in billing period (kWh)Days in that billing periodHow should the bill be used?A grid bill is net imports when solar is already installed. Do not use net imports as total home consumption. Keep your appliance list for peak power and nighttime share.

Step 4 of 4

How much reserve feels right?

We’ll suggest a starting system and show what the battery reserve means in everyday use.

Battery goalA full day includes its night; it is not added to the overnight requirement. Backup generator Generator rated running watts Room for future growth Equipment preference Panel preference Existing equipmentListed in your report. Existing capacity is not subtracted automatically. Extra planning notes Known maximum simultaneous load (watts)Otherwise we add the running watts of appliances marked “may run together.” Starting surge is still checked separately. A known total must include the appliances that will be running.