Free calculator
Jobsite Solar Generator Calculator
Calculate the right solar generator, battery bank, and solar panel size for your construction tools in minutes.
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Tool list
Add the tools you expect to use on site. Mark tools that need to run at the same time.
Advanced settings
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Jobsite Solar Generator FAQ
What size solar generator do contractors need?
Most light-duty contractors should start by sizing for the largest tools that run at the same time, then add enough battery capacity for the total daily watt-hours used on site.
Can a solar generator run construction tools?
Yes, many solar generators can run corded tools, chargers, lights, and vacuums when the inverter output and surge capacity match the tool loads.
How many watts does a circular saw use?
A typical circular saw uses about 1,200 to 1,500 running watts and can require more starting watts when the motor first spins up.
How much battery capacity do I need for a jobsite?
Battery capacity depends on daily energy use. Multiply each tool's running watts by hours used, add the totals, then add a safety margin and autonomy days.
How many solar panels are required?
Divide the required battery capacity by your local peak sun hours, then add a loss factor. This calculator uses a 15% system-loss allowance.