Free tool • No login required

Design your solar system in minutes.

Add the appliances that run at your home or office. We compute panels, batteries, inverter, monthly savings and payback — with live graphics and AI guidance.

The MDSS Tool

Load Calculator + AI Advisor

Add your appliances, get a designed solar system and a downloadable PDF report — instantly.

Live calculation

Your appliances

4 items
How to fill:
Hours = hours of use in a day (0–24). 0 = doesn't run.
Days = full 24-hour cycles. Use 1 for always-on devices (fridge, security). 0 for normal use.
Example: Fridge = 0 hours + 1 day · Fan = 8 hours + 0 days
LED Bulb (9W)
9W each · 6.0 h/day
Ceiling Fan
75W each · 8.0 h/day
Refrigerator
200W each · 24.0 h/day
Television (LED)
100W each · 4.0 h/day

System preferences

6 h
5 h
Daily energy
7.32 kWh
Across 4 appliances
Peak load
0.58 kW
If everything runs together

Energy mix • by appliance

LEDCeilingRefrigeratorTelevision01500300045006000