Solar Panels on an East, West, or North-Facing Roof: Do They Still Work?

Here's the answer most people search for and don't find: an east- or west-facing roof still works for solar. You'll lose roughly 10–20% of the output you'd get from a true south-facing roof, not the 50% many homeowners assume. A north-facing roof is a different story — usually not viable on its own, but that doesn't automatically rule out solar for your house.

The confusion comes from old solar math that assumed every roof faced due south. Modern panels, smarter system design, and time-of-use electricity rates have changed the calculation. This guide breaks down exactly what orientation costs you, when it still makes financial sense, and what to do if your roof faces the "wrong" way.

Why Roof Orientation Matters (And Why It Matters Less Than It Used To)

Solar panels generate the most electricity when sunlight hits them directly and perpendicular to the panel surface. In the Northern Hemisphere, a roof facing true south gets the most consistent, direct sun exposure across the entire day — which is why it's treated as the benchmark every other orientation gets measured against.

But "less than the maximum" isn't the same as "not worth it." Here's the real production loss by orientation, based on typical modeling for a mid-latitude US location with a standard roof pitch:

| Roof Orientation | Annual Production vs. Due South |

|---|---|

| Due South | 100% (baseline) |

| Southeast / Southwest | 92–97% |

| East | 80–88% |

| West | 80–88% |

| Northeast / Northwest | 65–75% |

| Due North | 50–65% |

Notice the gap: east and west roofs lose less than most homeowners expect, while north-facing roofs lose enough that the math gets genuinely difficult. That middle ground — east and west — is where most of the "will my roof even work" anxiety turns out to be misplaced.

East-Facing Roofs: Morning Power, Real Value

An east-facing array catches the sun as it rises and peaks in production during the morning hours, tapering off by early afternoon. For most homeowners, this isn't a downside — it's often a better match for when the house is actually using electricity.

Where east-facing works particularly well:

Households with morning-heavy usage — coffee makers, showers, laundry before work, home offices that start early
Utilities with time-of-use rates that penalize evening usage — if your peak rate window is 4–9 PM, an east roof won't help you avoid it directly, but it still reduces your total draw from the grid
Homes pairing solar with a battery — an east array charges a battery through the morning that then covers the evening peak, which is functionally similar to what a south-facing system does anyway

The main tradeoff: without a battery, an east-facing system exports less usable power during the afternoon and evening, when many households' consumption actually peaks. That's a design conversation, not a dealbreaker.

West-Facing Roofs: The Utility's Favorite Orientation

West-facing arrays peak in the afternoon and carry into early evening — which happens to align almost exactly with when most residential utility rates are highest and when most homes use the most electricity (people arriving home, air conditioning running, dinner being cooked).

This alignment is significant enough that some utilities and installers in Time-of-Use markets (California, Arizona, parts of the Northeast) now actively recommend a west-facing orientation over south-facing when a homeowner has both options, because the savings math is calculated in dollars avoided during peak-rate hours, not raw kilowatt-hours produced.

Bottom line on west-facing roofs: they produce slightly less total energy than south-facing over a year, but that energy often has a higher dollar value per kilowatt-hour because of when it's generated. Don't assume west is a compromise — in some rate structures, it's the better financial choice.

North-Facing Roofs: When the Math Usually Breaks Down

A due-north roof in the Northern Hemisphere receives mostly indirect and diffuse light. Production drops to 50–65% of a south-facing system, and payback periods stretch out accordingly — often past 15–18 years, which is longer than many equipment warranties and well past the point where the numbers still favor solar over simply staying on the grid.

That doesn't mean solar is off the table for the house. It means the north-facing section of your roof specifically isn't the answer. Three alternatives are worth exploring before writing off solar entirely:

Other roof faces. Most homes aren't uniformly north-facing — a garage, addition, or secondary roof plane may face east, west, or south and can carry most or all of a system on its own.
Ground-mount systems. If you have usable yard space, a ground-mounted array can be oriented and tilted for optimal production regardless of what your roof does.
Community solar. In states where it's available, you subscribe to a share of an off-site solar farm and receive bill credits — production isn't tied to your roof at all.

Tilt Matters Almost as Much as Direction

Orientation gets all the attention, but roof pitch (tilt angle) compounds the effect. A steep roof facing slightly east of true south can actually outperform a very shallow roof facing due south, depending on your latitude. As a rough rule:

Optimal tilt is close to your latitude in degrees (a home at 35° latitude does best around a 30–35° panel tilt)
Flatter roofs (under 15° pitch) lose some winter production but gain slightly in summer, generally netting out close to optimal
Steep roofs (over 45° pitch) favor winter production and lose some summer output

This is exactly why a generic percentage table only gets you so far — your actual roof pitch, latitude, and any shading objects all interact with orientation to determine real output. A proper design tool models all of it together.

Get a Production Estimate for Your Actual Roof, Not a Generic Average

Every number above is a rough industry benchmark. Your real production estimate depends on your specific roof plane, tilt, latitude, local weather patterns, and any shading from trees or neighboring structures. The only way to know your real numbers is a site-specific design — not a sales rep's verbal estimate.

The most efficient way to get that is through EnergySage, a free marketplace that matches homeowners with pre-vetted local installers. Each installer submits a production estimate modeled to your actual roof — orientation, tilt, and shading included — so you can compare real numbers side by side instead of guessing from a table like the one above.

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For homeowners who want a smaller, more flexible starting point, the Jackery Solar Generator 2000 Plus pairs a 2kWh portable power station with panels you can angle and reposition manually to chase the sun through the day — a workaround that a fixed rooftop array can't offer.

Neither replaces a full rooftop system for a home with good south, east, or west exposure. But they're a legitimate option when your roof genuinely isn't a candidate.

The Four Questions to Answer Before You Call an Installer

What does every roof plane on your house face, not just the largest one? Garages, additions, and secondary structures often have better orientation than the main roof.
What's your local utility's rate structure? If you're on Time-of-Use billing, a west-facing roof may out-earn a south-facing one in dollar terms.
What's your roof pitch? Steep and shallow roofs shift the optimal orientation slightly — this only shows up in a real site design, not a rule of thumb.
Is a battery part of the plan? Pairing any orientation with storage smooths out the timing mismatch between when panels produce and when your home actually uses power.

Bottom Line

East- and west-facing roofs are not the compromise most homeowners assume — they lose only 10–20% of south-facing output, and west-facing roofs often produce more valuable electricity under time-of-use rates. North-facing roofs are the real problem case, but usually mean looking at a different roof plane, a ground mount, or community solar — not giving up on solar altogether.

Don't rely on a rough percentage table (including this one) to make a final decision. Get a site-specific production estimate before you sign anything.

Last updated: 2026-07-07

Ready to see what your actual roof produces? Get free, competing quotes from local installers through EnergySage — each one includes a production estimate modeled to your roof's real orientation and tilt.

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