One structure as reference. Everything above it is shared.
A fixed mounting structure sets the baseline, and only the power the tracker makes above that baseline is treated as the new, shared business. Here's the full sequence.
Fixed structure sets the baseline
A standard fixed structure — its cost and its power — becomes the reference point. This is what you invest, and what you'd have earned anyway.
Aran funds the tracker premium
The cost gap between the tracker and the fixed structure is funded by Aran or its SPV. That gap becomes a separate project — not your liability.
Extra units are measured
The tracker makes more power. The difference over the fixed baseline — the gain units — is metered cleanly, every day.
Revenue is shared by investment
Gain units × your agreed unit rate = the shared revenue. It's split between you and Aran in proportion to who funded the premium.
A normal tracker purchase vs the OPEX model.
The tracker premium is the only part that carries genuine extra risk. The OPEX model moves that risk off your books entirely — unless you choose to take a share of the reward with it.
You fund the whole tracker
You fund a fixed structure
See your numbers move.
Enter your plant details, then drag the investment slider to decide how much of the tracker premium you want to fund. Your profit share, yearly earnings and capital at risk update in real time. Every figure is editable — replace the estimates with your own quote.
Your inputs
Illustrative default values — request a site-specific quotation.
Choose your level of involvement.
The model scales smoothly with how much of the premium you decide to fund — from a pure no-risk position to full ownership of the upside.
Fixed structure only
You pay only what a fixed structure costs. Aran funds the entire tracker premium and runs it as its own project. You simply receive a margin on the extra units.
- Zero extra capital
- Zero premium risk
- 10% of all extra-power revenue
- Downside capped at fixed-plant output
Share the project
Fund part of the tracker premium and your share rises in proportion to your stake. You take measured risk for a materially larger slice of the upside.
- Invest any portion of the premium
- Share scales with your stake
- Loss units still adjusted in your favour
- Premium typically pays back fast
Own the upside
Fund the entire premium yourself and the tracker behaves like a normal capital purchase — you keep every extra unit it makes, with the fastest payback of the three.
- You keep 100% of extra-power revenue
- Fastest return on the premium
- Full ownership of the asset's gain
- Aran builds, runs and maintains it
Your share rises with your stake.
From a 10% floor at zero investment to 100% at full funding — a straight, predictable line. There's no point on this curve where you're worse off than a fixed plant.
The marker tracks the investment slider in the calculator above.
If the tracker ever falls short, you don't pay for it.
Loss units, adjusted
Because the fixed structure is kept as a live reference, every unit is measured against it. In any period where the tracker makes less than the fixed baseline — a fault, downtime, an unusual day — those shortfall units are netted against the gains, not charged to you.
- The fixed reference defines your guaranteed floor
- Shortfalls are adjusted within the model's accounting
- You never earn less than the fixed plant would have given
- Aran carries the operational risk of the premium it funded
“Your worst case is the plant you would have built anyway. Everything the tracker adds on top is shared upside — never a liability.”
— THE ARAN OPEX PRINCIPLE
Common questions
What is the Aran Tracker OPEX model?
It lets you adopt a solar tracker by paying only for a fixed mounting structure. Aran funds the extra cost of the tracker (the premium) as a separate project, and you share in the extra power the tracker makes above the fixed baseline.
How much extra do I invest for the tracker?
At the base level, nothing beyond a fixed structure. You can also choose to fund part or all of the tracker premium to keep a bigger share of the extra power. The calculator shows how your share and payback change with how much you fund. Figures are illustrative; ask for a site-specific quotation.
What happens if the tracker underperforms?
The fixed structure is kept as a live reference. If the tracker ever makes less than a fixed plant would have, those shortfall units are adjusted within the model — you never earn less than the fixed plant would have given. Your downside is capped at the fixed-plant outcome.
Are the calculator numbers a guarantee?
No. All figures are illustrative estimates for explanation only and depend on site conditions, actual measured generation and the final commercial agreement. They're not a financial guarantee or investment advice. Final terms are set in the project contract.
Model it on your numbers
Share your site, your fixed-structure quote and your unit rate, and we'll build the exact OPEX structure that fits your project — and stand behind it for the life of the plant. No obligation.
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Message us on WhatsApp nowAll figures shown are illustrative estimates for explanation only and depend on site conditions, actual measured generation, and the final commercial agreement. They do not constitute a financial guarantee or investment advice. Final terms are set in the project contract. Illustrative default values — request a site-specific quotation.
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