Own vs Rent Your Roof: Which Solar Model Makes Sense for Singapore Homeowners?

If you've started researching solar for your landed home in Singapore, you've probably come across two very different offers. The first: pay upfront, own the system, keep all the savings. The second: let a company install panels on your roof for free in exchange for using your roof space, often keeping the export revenue themselves.

Both models have a place. But they are fundamentally different financial decisions — and most homeowners don't realise just how different until they read the fine print.

This article gives you an honest, objective breakdown of both so you can decide which one suits your situation.

The Two Models Explained

Owning your system means you purchase the solar panels, inverter, mounting structure, and installation outright — typically as a one-time payment. Everything on your roof belongs to you. All electricity generated belongs to you. Any savings on your SP Group bill are yours, and any excess power you export back to the grid earns you credits — also yours.

Roof rental or solar leasing means a solar company installs panels on your roof at no upfront cost to you. In return, you give them the right to use your roof space — often for 20 to 25 years. The company owns the panels and, in most arrangements, retains the export (Enhanced Central Intermediary Scheme or ECIS) revenue. You may receive a small fixed monthly payment for your roof, or a discounted electricity rate, but the bulk of the system's financial value flows to the operator.

Upfront Cost vs Long-Term Value

The appeal of the roof rental model is obvious: zero dollars on day one. For homeowners who are cash-constrained or simply wary of a large capital outlay, it removes the barrier entirely.

But this comes at a cost that compounds over decades.

A well-sized residential system in Singapore — say, a 19.65 kWp installation with 30 Tier-1 panels — costs in the range of $21,000 to $22,000 inclusive of GST. Based on real system simulations, that same system generates estimated savings of around $510 per month in year one, accounting for daytime self-consumption and SP Group export credits at current tariff rates.

At that rate, the payback period on a purchased system sits at approximately 3.6 years. After that, every dollar of savings for the remaining 21+ years of the system's life goes directly into your pocket. Modelled across 25 years — with a conservative 2% annual tariff increase and 1% per year panel degradation — the net value of ownership comes to over $152,000 on a $21,600 investment.

Under a roof rental arrangement, that same $152,000 in cumulative value is shared — or in some models, largely retained — by the operator. You get your roof used, your panels maintained, and perhaps a modest fixed fee. But you do not get the compounding upside.

Who Controls the System?

When you own your system, you decide everything. You choose the panel brand, the inverter, the monitoring platform. You can add battery storage later. You can expand the system if your energy needs grow. And critically, you retain full access to your roof.

Under a lease agreement, the system belongs to the operator. If you want to make roof repairs, install a skylight, or add a rooftop feature, you may need permission. Some contracts include clauses restricting roof modifications for the duration of the lease.

What Happens When You Sell Your Home?

This is the question most homeowners forget to ask — until they're in the middle of a sale.

If you own your system, it adds value to the property. Buyers are increasingly aware of solar as an asset, and a system with 20+ years of remaining panel warranty and a proven generation track record is a genuine selling point. You can transfer the monitoring account, warranties, and SP Group registration to the new owner cleanly.

Under a roof lease, the agreement typically transfers with the property. This means your buyer inherits a 15 or 20-year contract with a third-party operator — something that can complicate conveyancing, deter buyers, or require early termination fees. Early exit clauses vary by provider, so this is worth reading carefully before signing.

Maintenance and Warranties

Under ownership, you are responsible for maintenance — but a quality installation comes with layered protection: typically a 30-year linear power warranty on panels, a 25-year product warranty, a 10-year inverter warranty, a 5-year workmanship warranty, and a 2-year waterproofing warranty. For the first decade at least, most issues are covered.

Under a roof lease, the operator handles maintenance — which is genuinely convenient. But their incentive is to minimise cost, not maximise your system's output. If a panel underperforms and it's not egregious enough to trigger a warranty claim, it may simply stay that way.

Which Model Is Right for You?

The roof rental model suits homeowners who cannot or do not want to commit capital, who plan to move within five years, or who simply want the panels without any involvement in the system.

The ownership model suits homeowners who are optimising for long-term financial return, who want full control over their roof and system, and who plan to stay in the property for at least five years. If you can absorb the upfront cost — or finance it — the ownership model is almost always the better financial outcome over a decade or longer.

At Lion City Solar, we believe that solar is one of the most significant home investments a Singapore homeowner can make. That's why we only offer the ownership model: because we think you deserve to keep what your roof generates.