Mounting a balcony solar panel
Where and how you mount the panel decides how much it makes and whether it stays put. A railing mount is simplest and needs no drilling. A tilted stand makes about half again as much power, if you have the floor space.
Updated October 2026
Your three options
| Mount | Output (south, vs best) | Drilling | Good for |
|---|---|---|---|
| Railing hooks or clamps | About 63–67% | Usually none | Renters, small balconies |
| Wall bracket | About 63–67% upright, more if angled | Yes | Owners, sunny walls |
| Tilted ground stand | Up to 100% at about 35° | None, uses weight | Patios, yards, flat roofs |
The angle
A panel straight up (90°) is easy but gives up about a third of its possible output. Tilting back toward 30–40° gets the most over a year. A middle angle, around 60°, is a fair compromise on a railing that allows it. Try angles in the calculator.
Wind and weight
- A full-size panel weighs around 45–50 pounds and catches wind like a sail.
- Use a mount made for your panel’s size, fixed at several points.
- Ground stands need enough ballast for strong gusts. Follow the maker’s numbers.
- On high floors, think hard about what’s below.
The cable
Run the cable so nobody trips on it and a door or window can’t pinch it. Plug straight into a wall outlet; certified kits are designed and tested that way.
Common questions
Do I need permission to hang a panel outside my railing?
Usually, yes, from your landlord, HOA or condo board. Most state plug-in laws deal with utilities, not building rules. How to ask.
Can I put the panel in a window instead?
You can, but glass and a poor angle cut output a lot. Apartment options.
Can I mount a panel without drilling?
Usually, yes. Railing hooks and clamps, and free-standing ground stands weighed down with ballast, need no holes. That's the renter-friendly route.
Which way should the panel hang on a railing?
On the outside facing out gets the most sun, but check your building's rules and what's below. Inside the railing is safer but often shaded by the balcony itself.