Tools
Free calculations for the questions everyone asks, from the first plan to the battery that's running low.
How many panels and batteries?
Your complete system: panels, batteries, inverter and generator, with what it costs.
- your location
- where you install your panels (roof, ground, shade)
- what your devices use
- the real weather for the spot, month by month
Summer cabin · LaurentiansExample
1,600 W
of panels · 2.6 kWh of batteries
The battery
You already have a battery: how long it lasts, how full it is, how long to recharge it.
How long will my battery last?Your devices, your battery: hours or days before its limit.How full is my battery?The multimeter voltage becomes a percentage.How long to recharge it?With your panels or your generator and charger.Wiring my batteries in series or parallelThe wiring, the total and the diagram.
Planning your system
You're planning a system, or adding a part: the right size before you buy.
What angle for my panels?For your location and season, with the noon sun.What size inverter?Your devices' running and start-up watts.How many panels in series on my controller?The voltage in deep cold, before it fries the controller.Which generator, and how much gas?The size, and the litres per day and per month.What size of wire and fuse?The gauge, the loss and the fuse that protects the wire.Compare battery pricesThe cost per kWh you can really use.