South Africa's commercial and industrial energy market has largely moved past the question of whether to install solar. The question now is how to finance it. Two structures dominate the C&I landscape: Rent-to-Own (RTO) and the Power Purchase Agreement (PPA). Both offer R0 upfront. Both reduce your electricity bill from day one. But they are structured very differently — and choosing the wrong one can cost you significantly over a 5–10 year horizon.
How Rent-to-Own Works
Under an RTO structure, SOCO CAPITAL procures and installs the solar PV and/or BESS system on your behalf. You pay a fixed monthly rental — calculated to be below your current electricity bill — for a contracted term, typically 5–7 years. At the end of the term, ownership of the equipment transfers to you at a nominal value (often R1).
Key mechanic: You are paying for use of the asset over time, not buying electricity units. Your monthly payment is fixed regardless of how much energy the system produces.
The RTO structure sits off-balance-sheet for most businesses under IFRS 16 treatment (subject to your auditor's assessment), and the rental payments are fully tax-deductible as an operating expense.
Who RTO suits best
- Businesses that want to own the asset at end of term
- Operations with stable, predictable energy consumption
- Companies that prioritise fixed, predictable monthly costs over maximising savings
- Sites where the long-term occupancy is confirmed (owned property or long lease)
How a PPA Works
Under a Power Purchase Agreement, SOCO CAPITAL owns the system for the full duration of the contract — typically 15–20 years. You purchase the electricity generated by the system at an agreed tariff, expressed in Rands per kWh, which is set significantly below the grid tariff at the time of signing.
Key mechanic: You are buying energy units, not renting equipment. Your monthly payment varies with actual generation output. You never own the system.
PPA tariffs are typically structured with an annual escalation rate (3–6%) that is materially below Eskom's historical annual tariff increases (averaging 12–15% over the past decade). This escalation differential is where the long-term savings compound most aggressively.
Who PPA suits best
- Businesses that do not want to own or be responsible for solar assets
- Operations where energy consumption may fluctuate significantly
- Companies with long lease terms or owned properties
- Businesses that want the longest possible savings horizon with maximum NPV
- Situations where off-balance-sheet treatment of energy expenditure is preferable
Side-by-Side Comparison
| Factor | Rent-to-Own | PPA |
|---|---|---|
| Upfront cost | R0 | R0 |
| Contract term | 5–7 years | 15–20 years |
| Asset ownership at end | Yes — transfers to client | No — remains with SOCO CAPITAL |
| Monthly payment basis | Fixed rental | Variable (per kWh generated) |
| O&M responsibility | SOCO ENERGY (during term) | SOCO ENERGY (full term) |
| Tax treatment | Rental = operating expense (deductible) | Energy purchase = operating expense (deductible) |
| Balance sheet impact | Possible IFRS 16 lease liability | Off-balance-sheet (energy purchase) |
| Savings horizon | Larger savings post-ownership transfer | Consistent savings over full contract |
The Tax Dimension
Under Section 12B of the Income Tax Act, a business that purchases a solar asset outright (including via structured debt) may claim a 100% capital allowance in year one. This does not apply to RTO or PPA, where you are not purchasing the asset.
However, both RTO rentals and PPA energy payments are fully deductible as operating expenses in the year they are incurred — providing consistent tax relief throughout the contract term without requiring a capital outlay.
If your business has strong cash reserves and wants to maximise the tax benefit in year one, a Section 12B-structured debt purchase may outperform both RTO and PPA on a post-tax NPV basis. Read our Section 12B guide →
Which Should You Choose?
In our experience structuring hundreds of C&I energy deals, the decision usually comes down to two questions:
- Do you want to own the asset? If yes, RTO is the cleaner path. If ownership is irrelevant to you, a PPA's longer savings horizon usually wins on NPV.
- How long is your planning horizon? If you're committed to a site for 15+ years, a PPA's compounding savings advantage over escalating Eskom tariffs is compelling. For shorter horizons or uncertain occupancy, RTO's 5–7 year term is lower risk.
There is no universally correct answer — the right structure depends on your balance sheet position, tax situation, property tenure, and energy consumption profile. SOCO CAPITAL structures proposals across all three models (RTO, PPA, and debt) so you can compare them directly on a like-for-like NPV basis before committing.