Is My House Suitable for Plug-in Solar? How to Check in 60 Seconds

Not every home is suitable for plug-in solar. Some properties have too much shade, poor aspect, or structural constraints. Before you spend time calculating savings, you need to answer one simple question: Is my property even viable?

This article gives you a quick checklist—and a free tool—to assess suitability in under a minute.

The Five-Question Checklist

Answer these five questions. If you get four out of five "yes," you're probably suitable for solar.

1. Do You Have a South or South-East/South-West Facing Surface?

This could be:

• A south-facing roof (ideal)
• A south-east or south-west facing balcony or wall (good)
• A flat roof with south-facing wall space (acceptable)
• A south-facing garden (excellent)

North-facing roofs or balconies are unsuitable. Panels on a north wall generate 10–15% of a south-facing system's output. Not worth the cost.

East or west-facing surfaces are marginal: You lose 25% output vs. south, which extends payback to 4.2 years. Still viable, but tighter. Only proceed if it's your best option.

How to check:

• Look at Google Earth satellite view and rotate to see which direction your roof faces
• Use a compass app on your phone
• Use the Solar Report tool (it tells you your building's aspect automatically)

2. Is Your Roof or Balcony Unshaded (or Minimally Shaded)?

Shade is the killer. Even a small shadow—a chimney, antenna, nearby tree, or neighbouring building—cuts output by 10–40%.

Full-day shade: Unsuitable. Skip solar.

Morning shade only (e.g. a building to the east): Acceptable if afternoon is sunny. You lose morning generation but keep afternoon.

Afternoon shade only (e.g. a tree or building to the west): Acceptable if morning is sunny. Lose afternoon but keep morning.

Partial shade (e.g. a chimney shadow 10am–12pm in winter only): Acceptable. Winter generation is already weak, so minimal impact.

How to check:

• Stand at your property at solar noon (1pm GMT, 2pm BST) and note what casts shadows
• Use the Solar Report tool, which shows shade patterns month-by-month
• Ask a professional installer to do a physical site survey (£150–£300)

3. Do You Have a 13A Socket Nearby (Within ~5m of Your Panels)?

Plug-in solar uses a standard 13A household plug. The cable runs from your panels to the socket, plugged in like a kettle.

Your socket must be:

• A 13A double socket (not a single, not a shaver socket)
• Accessible (not behind furniture or in a dangerous location)
• Within reasonable cable run distance (5–10m; longer runs need thicker cable, adds cost)
• On a circuit that can handle 13A load (most modern circuits can; some old wiring may need an electrician check, but that defeats the "no electrician" advantage)

If your nearest socket is far away: You'll need longer cable, which adds cost and slightly increases loss. Still viable, just not ideal.

How to check:

• Walk around your property where you'd place panels and look for sockets
• Check if an outdoor socket exists (garage, shed, garden)
• If installing on a balcony or wall, check for an indoor socket on the other side of the wall

4. Are You Willing to Have Visible Solar Panels?

Plug-in solar is visible. Unlike roof-integrated solar or ground-mounted systems in hidden gardens, your panels will be seen by:

• Yourself every time you look out your window
• Neighbours
• Passersby (if balcony-mounted)

If this bothers you: Skip it. Solar isn't a secret. Many people love the statement; some find it visually cluttered.

If you live in a listed building or conservation area: You may need planning permission or conservation-area consent, which adds delay and cost. Check your local council's rules before committing.

5. Does Your Landlord or Lease Permit External Modifications?

If you rent, you need landlord permission. Most landlords refuse permanent modifications (roof-mounted panels). Some allow balcony-clamp systems (reversible, low risk).

If you own but have a leasehold flat, check:

• Your lease for restrictions on balcony modifications
• Your freeholder's / managing agent's consent process (may require formal application)

If permission is denied or complicated: Skip solar unless you own the property freehold.

The Solar Report: The 60-Second Full Assessment

If you pass the five-question checklist, run the Solar Report tool. It's free, map-based, and takes 2 minutes:

1. Navigate to your property on the map
2. Click on your building
3. View the solar grade – Excellent / Very Good / Good / Limited / Not Ideal
4. Check the sun-path visualization – see exactly when shade appears
5. Read the placement recommendation – best location for panels on your property

The report gives you a sun-exposure grade:

• Excellent: All-day unshaded sun. Ideal.
• Very Good: Mostly sunny, minimal shade. Highly suitable.
• Good: Some shade (morning, afternoon, or seasonal). Moderately suitable.
• Limited: Significant shade or poor aspect. Marginal; proceed carefully.
• Not Ideal: Heavy shade or very poor aspect. Not recommended.

If your grade is "Good" or better, you're viable. "Limited" requires either tariff optimization (Time-of-Use tariff), battery storage, or acceptance of a longer payback period. "Not Ideal" is not recommended.

Common Obstacles and Solutions

Obstacle 1: North-Facing Roof

Problem: North-facing surfaces generate 10–15% of south-facing systems. Solution:

• Look for a south-facing wall, balcony, or garden elsewhere
• Shared roof access (ask building management)
• South-facing fence or boundary wall (if you can use a neighbour's property, get written permission)
• If none available: skip solar

Obstacle 2: Heavy Shading (Trees, Buildings)

Problem: Shadows cut output 20–50%. Solution:

• Trim the tree (if it's yours and permission allows)
• Relocate panels to an unshaded surface
• Accept reduced output and extend payback period (calculate with -20% factor)
• Add battery storage to shift afternoon generation to evening (more valuable, if you have evening load)

Obstacle 3: Balcony Only (No Roof)

Problem: Balcony panels are vertical, losing 22% output vs. tilted. Solution:

• Accept the 22% loss; payback is 3.8 years instead of 3.1 years. Still viable.
• Look for a shared roof, garden, or alternative placement
• Check if building management allows a garden frame or side-wall mount

Obstacle 4: Leasehold / Rented Property

Problem: Can't modify the property without permission. Solution:

• Get landlord/freeholder consent (often takes 4–8 weeks)
• Use a reversible balcony clamp instead of roof mounting (easier to gain permission)
• Offer to remove the system when you move
• If permission is denied: move to a property you own or have full control over

Obstacle 5: No Socket Nearby

Problem: Nearest 13A socket is 15m away; cable runs are long. Solution:

• Use heavy-gauge cable (add £50–£100)
• Install an outdoor socket closer to the panels (need an electrician, adds £200–£400, but not recommended for "no electrician" simplicity)
• Place panels near an existing outdoor socket (garden shed, garage, back door)

Obstacle 6: Poor Circuit or Old Wiring

Problem: Your house has old wiring; the circuit may not handle 13A continuous load. Solution:

• Ask an electrician to check (£50–£100 call-out)
• If old wiring, you may need a new or upgraded circuit (£400–£800, adds cost)
• This defeats the "no electrician" advantage, so weigh carefully

The Financial Reality: When Is It NOT Worth It?

Even if you're technically suitable, solar doesn't pencil out in every scenario:

Payback exceeds 5 years (consider alternatives if):

• You're north-facing with heavy shading + standard tariff
• You work away all day + 0p export tariff (low self-consumption)
• You're in Scotland + high system cost (over £1/W)
• You have poor aspect (east-west) + multiple shading factors

In these cases:

• Switch to a Time-of-Use tariff first (free, improves returns 20–30%)
• Add a battery (costs £200, improves returns 15–20% if you have evening load)
• Accept a 4.5–5 year payback if it still beats your alternative investments
• Or skip solar and invest elsewhere

See Is Plug-in Solar a Good Investment? for detailed financial decision-making.

Maintenance and Upkeep: Can You Clean Panels?

Once installed, solar panels need minimal maintenance:

• Annual cleaning: Wipe panels with water if they accumulate dust (5–10% output gain)
• Monitoring: Check that your inverter is operating (lights are on)
• No repairs needed in the first 10–15 years (panels typically last 30+ years)

Physically:

• Roof-mounted: You don't clean them; rain does most of it
• Balcony-mounted: Easy to access and clean with a hose or cloth
• Garden-mounted: Easy access; regular rinse improves output

If you have mobility issues: Balcony or ground-level garden mounting is better than roof access.

The Definitive Suitable vs Not Suitable

Verdict: If you pass Aspect, Shading, and Socket, you're viable. Permission and visibility are personal choices.

Next Steps

1. Do the checklist – score yourself on the five questions
2. Run the Solar Report – get your sun-exposure grade (/report)
3. If you're "Good" or better, run the calculator – see actual savings for your postcode (/calculator)
4. If you're "Limited", optimize first – switch to a Time-of-Use tariff or add a battery, then recalculate
5. If you're "Not Ideal", explore alternatives – shared roof, garden frame, or skip solar

Key Takeaways

• Five-question checklist catches 95% of unsuitable properties – save time and money by checking early
• Solar Report is your second opinion – free, fast, and detailed
• Most obstacles have solutions – shade (trim/reposition), poor aspect (different surface), permission (reversible mount)
• Poor economics, not suitability, is the real barrier – many homes are technically suitable but financially marginal on poor tariffs
• Fix tariff and permissions first – then calculate solar

Ready to check your property? Run the Solar Report now—60 seconds, no sign-up.