Solar ROI & Payback (Load + Diesel + Tariff)
Purpose-built for solar-hybrid aquaculture: enter your daily load profile, required battery autonomy, grid tariff and diesel assumptions. The tool sizes PV + battery, computes annual grid + diesel savings and returns simple payback and 10-year ROI.
Scenario modelling
Flexes solar share, irradiance, install cost, avoided grid tariff, diesel price and battery cost.
Calculator inputs
24h average energy demand across pumps, aeration, RAS, hatchery.
Fraction of annual kWh covered by PV (after losses).
Typical 3.0–3.8 kWh per litre for well-loaded generators.
Aeration, biofilter, alarms — the loads batteries must ride through.
Results
How ROI changes when tariff, diesel and autonomy shift
Grid values recompute live. Lower payback = better; higher ROI = better. Anchored on your current inputs.
| Tariff ↓ / Diesel → | $0.66/L | $0.88/L | $1.10/L | $1.32/L | $1.54/L |
|---|---|---|---|---|---|
| $0.11/kWh | 6.6 years | 5.6 years | 4.9 years | 4.3 years | 3.8 years |
| $0.14/kWh | 5.8 years | 5 years | 4.4 years | 3.9 years | 3.5 years |
| $0.18/kWh | 5.1 years | 4.5 years | 4 years | 3.6 years | 3.3 years |
| $0.22/kWh | 4.6 years | 4.1 years | 3.6 years | 3.3 years | 3 years |
| $0.25/kWh | 4.1 years | 3.7 years | 3.4 years | 3.1 years | 2.8 years |
Estimates Only: This calculator is provided for general informational purposes only. Results are approximate and may contain errors, omissions, or outdated information. They do not constitute legal, financial, engineering, tax, technical, or professional advice. Users are solely responsible for independently verifying all calculations, specifications, prices, regulations, and requirements with qualified professionals before making any decisions. By using this calculator, you acknowledge that the website owners, operators, and affiliates accept no responsibility or liability for any loss, damage, or decisions resulting from its use.
Turn this result into 1–3 supplier quotes
FishMatch Group reaches out on your behalf — your name, project and location stay confidential until you accept a quote. No sign-up, no listing fees, buyers never pay.
How supplier matching works
- 1. Private brief. Your spec goes only to manufacturers we have selected for the right category, capacity and export experience.
- 2. Confidential outreach. Suppliers see the technical spec — not your name, company or exact location — until you accept a quote.
- 3. 1–3 comparable quotes. Typically within 5–10 business days, aligned on scope so you can compare like-for-like.
- 4. Financing intro (optional). If needed, we introduce your project to a financing partner. No fee to buyers.
Notes
- Solar share (0.4–0.7) reflects most solar-hybrid aquaculture designs; 100% off-grid requires oversized PV + battery.
- Diesel-heavy baselines pay back fastest (2–4 yrs). Grid-tied farms typically 5–8 yrs.
- Battery is sized for critical load only — non-critical loads run on grid or solar directly.