Small-scale solar: the honest maths for a rented flat
Balcony panels, plug-in kits and payback periods, worked through for three realistic household sizes.
29 June 2026 · 12 min read
Chetanya Goel · Founder & Editor
Chetanya started Annam Naturals after two years of keeping a household waste diary. Chetanya writes about the boring, repeatable habits that hold up in a real week.
Plug-in balcony solar is sold on the promise of a short payback. Whether that is true depends almost entirely on orientation, on your daytime usage, and on whether your tenancy allows it at all.
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Responsive display unit — placed after the introduction
The three cases we modelled
For a single-person flat with low daytime use, payback ran long enough that the panels would likely outlast the tenancy but not obviously the finances. For a household working from home, with a south-facing balcony, the sums improved considerably because the generated power was actually consumed rather than exported for nothing.
What changes the answer most
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In-article unit — placed mid-content
- Orientation, which can halve output between south and east facing
- Daytime consumption, since exporting is usually worth little or nothing
- Whether your landlord and building rules permit fixings
Our honest summary for renters: check the tenancy first, then your daytime usage, and only then the panel price. The panel price is rarely the deciding factor.
For more of this kind of testing, the green living & energy hub collects everything we've tried in that area.
Frequently asked
Do I need to buy anything to get started?
No. Every method here begins with what is already in your cupboards. We only recommend a purchase when something has genuinely worn out, and we say what it should cost.
How do you test the things you write about?
Minimum four weeks of ordinary household use, with notes. For anything involving energy or money we use a plug-in meter and record the readings before and after.
Are your recommendations paid for?
Never. Brands cannot buy placement. Some outbound links are affiliate links, which we mark, and they do not change what makes the list.
What if a method doesn't work in my home?
Write to us. A surprising amount of our best material comes from readers explaining why something failed in a flat, a shared house or a very cold winter.
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