Step 1: What do you want to power?
Tap the appliances you want to run on solar
Can't find your device?
Add it and input its watt number.
Add a Device That's Not Listed
Step 2 — How many hours a day does each one run?
Your devices
(none selected yet)
Change the number on the right to set how many hours each device runs per day. For example, a fan running all night = 8 hours.
Tap a device above and it'll appear here
Step 3 — Tell us about your solar generator
Generator details
This info is printed on the box or the label of your generator. If you're still shopping, use the numbers of the model you're looking at.
The total energy the battery holds. Common sizes: 500Wh, 1000Wh,
2000Wh. Check the box.
100% = fully charged. Half full? Put 50. We'll use this to give
you an accurate result.
How well the generator converts stored power to usable power.
Most are 85–92%. Not sure? Leave it at 90.
The size of the solar panel connected to it. e.g. 200W or 400W.
Put 0 if no panel is attached yet.
How many good hours of direct sunlight you get. In most of
Nigeria, this is between 4 and 6 hours a day.
Most batteries shouldn't go below 20% or they get damaged. So
put 80 here — meaning you use 80% of it safely.
Step 4 — Your results
Your Power Report
Without solar, it will last for
—
hours on battery alone
Total power being used at once
—
watts all running together
Energy your devices need each day
—
watt-hours per day
What your solar panel makes daily
—
watt-hours from the sun per day
Days before you need to recharge
—
full days of power (with solar)
Is your solar panel enough?
—
Wh extra or short per day
Waiting for your info…
Fill in your devices and generator details above, then tap the
big button. We'll tell you exactly what you need to know!
Which devices eat the most power?
Nothing to show yet — run the calculation first.
