Standalone Photovoltaics – Cost & Guide 2026
Off-Grid Photovoltaics – Cost & Guide 2026
Complete independence from the grid — cost, batteries, comparison & free quote
🔋 What Is an Off-Grid Photovoltaic System?
An off-grid photovoltaic system operates completely independently from the electricity grid. It generates power from the sun, stores it in batteries, and distributes it whenever needed — day or night, with or without sun.
Ideal solution for: holiday homes, agricultural plots, remote areas or where there is no grid connection.
⚡ Off-Grid vs On-Grid – Comparison
| Feature | Off-Grid | On-Grid |
|---|---|---|
| Grid connection | ❌ No | ✅ Yes |
| Battery storage | ✅ Essential | ⚠️ Optional |
| Installation cost | Higher | Lower |
| Payback period | 8–12 years | 5–7 years |
| Energy autonomy | ✅ 100% | ❌ Partial |
| Net Billing | ❌ Not applicable | ✅ Applicable |
💰 Off-Grid System Cost (2026)
| Power | Cost (with battery) | Suitable for |
|---|---|---|
| 2 kW | €5,000 – €8,000 | Holiday home / agricultural plot |
| 3 kW | €7,500 – €12,000 | Small holiday home / apartment |
| 5 kW | €12,000 – €18,000 | Residence / holiday home |
| 8–10 kW | €20,000 – €35,000 | Large residence / business |
💡 The main reason for the higher cost is the storage battery, which is essential in an off-grid system.
🔧 What Does an Off-Grid System Include?
- Photovoltaic panels: Generate power from the sun
- Lithium batteries (LiFePO4): Energy storage for night or cloudy use
- Inverter-Charger: Converts DC to AC and manages charging
- MPPT Charge Controller: Maximizes panel efficiency
✅ When to Choose an Off-Grid System?
- You do not have access to the electricity grid (holiday home, agricultural plot)
- You want complete energy independence
- You want protection from power outages
- You are on an island or in a remote area
📍 Installation Example
Holiday home in Peloponnese, consumption 150 kWh/month:
- System: 3 kW + 10 kWh battery
- Cost: ~€9,000 – €12,000
- Payback period: 9–11 years (without electricity bill)
❓ Frequently Asked Questions
What is the difference between an off-grid and an on-grid system?
An off-grid system operates independently of the grid with batteries, while an on-grid system connects to the grid and can utilize net billing.
Do I need a permit for an off-grid system?
For holiday homes and agricultural plots, the process is simpler. No grid connection is required, so no notification to HEDNO is needed.
How long do lithium batteries last?
LiFePO4 batteries have a lifespan of 3,000–6,000 charge cycles, which means 10–15 years in normal use.
Can I add a battery later?
Yes, you can start with an on-grid system and add a battery later if you choose a hybrid inverter.