Off-Grid Power for Farms, Lodges and Islands
No grid, no generator, or a generator you are tired of feeding. Inverter-plus-battery systems from 12 kW to 240 kW, sized on the worst week of the year rather than the average.
The Configuration
| Component | Specification |
|---|---|
| Inverter | INV-G1618, 12 kW, parallel up to 12 units with one comms cable |
| MPPT | 2 × 8,000 W per inverter, 500 V DC input |
| Storage | ATHENA B/C (15.36–34.3 kWh, 51.2 V) or SCRA-R HV (20–256 kWh, 200–820 V) |
| Scalability | 12 inverters in parallel = 144 kW continuous, 288 kW peak |
| Output | 230/400 V, 50/60 Hz, pure sine wave |
| Generator input | Auto start/stop with dry contact |
Sizing Rule for Off-Grid
For off-grid systems the battery is sized on the worst week, not the average. Send us daily kWh for the lowest-irradiance month and we will size from that. Oversizing the array and undersizing the battery is the most common and most expensive mistake in off-grid projects — the array produces more than the battery can absorb, and the surplus is thrown away.
Two design rules we apply:
- Array-to-battery ratio between 1.2 and 1.5 kWp per 10 kWh of storage for temperate latitudes; lower for the tropics
- Autonomy of 2–3 days on battery alone, with the generator as the third line of defence rather than the second
Typical Projects
| Project | Load | Configuration |
|---|---|---|
| Dairy farm, Kenya | 18 kW peak, 90 kWh/day | 4 × INV-G1618 + 3 × ATHENA C (102.9 kWh) |
| Safari lodge, Tanzania | 25 kW peak, 140 kWh/day | 6 × INV-G1618 + SCRA-R HV 160 kWh |
| Island microgrid, Philippines | 60 kW peak, 320 kWh/day | 12 × INV-G1618 + SCRA-R HV 320 kWh + 40 kW genset |
| Remote clinic, DRC | 8 kW peak, 35 kWh/day | 1 × INV-G1618 + 2 × ATHENA B (30.72 kWh) |
Project examples are illustrative configurations. Reference contacts available on request under NDA.
Send Us Your Off-Grid Load Profile
Daily kWh for the worst month, peak kW, PV irradiance data if available, and whether a generator will be retained as backup.