Your First Solar Panel: A Safe Starter Setup
A 100-watt panel, a charge controller, and a small battery — enough to run lights and charge devices off-grid.
A starter solar setup does not need to power a whole house. A single 100-watt panel, a small charge controller, and a 12-volt battery will run LED lighting and charge phones for a shed or a camper.
Size the panel to your battery. A 100-watt panel pushes roughly 5 amps in full sun, so a 35 amp-hour battery charges from empty in about a day of good sun.
The charge controller is the brain of the system. A cheap PWM controller is fine for a 12-volt starter; a MPPT controller is worth it once you add a second panel.
Use the right wire. 10 AWG is the minimum for a short panel-to-controller run; longer runs need thicker cable to avoid voltage drop.
Mount the panel true south (in the northern hemisphere) at your latitude angle, clear of shade between 9am and 3pm.
For full system sizing, battery bank planning, and whole-home math, the Energy Revolution System walks through the load calculations step by step.
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Practical off-grid electricity planning
Load sizing, battery bank planning, and off-grid energy concepts for homeowners.
