Size your load
Watts first, then the box
Write down what you want running at the same time and for how long. That decides the inverter, the batteries and the panels.
Appliances
Typical watts
From appliance labels. Motors pull two to three times more for a second when they start.
| Appliance | Running watts | Start-up | Hours a night |
|---|---|---|---|
| LED bulbs x 10 | 100 | 100 | 10 |
| Ceiling fans x 3 | 225 | 300 | 8 |
| TV and decoder | 150 | 150 | 5 |
| Internet router | 15 | 15 | 12 |
| Fridge | 200 | 600 | 12 |
| Chest freezer | 300 | 900 | 12 |
| Pumping machine 1hp | 750 | 2200 | 0.5 |
| 1hp air conditioner | 1000 | 2500 | 4 |
Example figures for this demo store.
An example
A three-bedroom flat in Yaba
Lights, fans, TV, router, fridge, freezer and a pumping machine.
- Peak load
- About 1,800W
- Night use
- About 6kWh
- Inverter
- 3.5kVA hybrid
- Battery
- 5kWh lithium
- Panels
- Six 550W panels
- Kit
- Home Solar Kit
How to count
Four steps
List
Every appliance you want on during an outage.
Add the watts
Use the label or the table above.
Hours
How long each one runs at night.
Send it
Or let a technician do it at the load audit.
Load audit
Book a load audit
Your area, the building and when you are home. A technician visits and sends a written sizing.
- desk@powerhouse.example
- Oregun Road, Ikeja, Lagos