Solar energy load calculator

This page helps calculate how much solar power you require for your hone or office. Simply enter the number of hours that you require for each appliance and the system will calculate your requirements. We have entered the average power consumption for most appliances, so please note that there might be some differences between our calculations and your appliances.

On-grid, off-grid and hybrid systems:
Most solar installations are either off-grid (stand-alone and completely separated from the regular electricity supply) and on-grid (where the system is tied to the regular supply and excess solar power is actually sold back to the electricity supplier). Most installations in Nigeria will be somewhere in between. That means users are not 100% reliant on solar power. Whenever the regular electricity supply is on, the solar panels (in the daytime) can recharge the batteries, uninterrupted. More importantly, the batteries may also be recharged by the regular power supply, through the inverter. What is the implication of this for Nigerian users? Well... it means that when you calculate the your daily wattage, below, only a certain percentage of that should be from your solar panels. The percentage depends on how much regular electricity you get. As a rough guide we will expect anyone who has about 6 hours of electricity every other day to start with a solar panels plan that provides half their daily usage as calculated, below. If this proves inadequate, they can always add additional panels and/or batteries.

*As a general rule we advise that you should opt for energy-efficient appliances whenever possible.



Appliance
Quantity
Daily usage
(hrs per day)
Power Rating
(Watts)
Daily Watts
Phone Charger
3
0
Coffee maker
1050
0
Clothes washer
425
0
Dishwasher
1800
0
Ceiling fan
120
0
Standing fan
150
0
Clothes iron
1400
0
Microwave oven
1400
0
Laptop computer
50
0
Desktop Computer
115
0
Stereo
100
0
Small refrigerator (18 cubic ft.)
69
0
Game console (XBOX 360)
135
0
20" LED flatscreen tv
25
0
30" LED flatscreen tv
35
0
40" LED flatscreen tv
45
0
40" Plasma flatscreen tv
60
0
50" LED flatscreen tv
60
0
50" Plasma flatscreen tv
109
0
60" LED flatscreen tv
75
0
60" Plasma flatscreen tv
165
0
40 Watt standard bulb
40
0
Energy-saving replacement (40 watt bulb)
7
0
60 Watt standard bulb
60
0
Energy-saving replacement (60 watt bulb)
11
0
75 Watt standard bulb
75
0
Energy-saving replacement (75 watt bulb)
15
0
Total daily wattage
0
Recommended starting plan
0