Remote Ontario Cabin — 24V Solar + 5 Days Autonomy
cabin · 24V system · Parry Sound, ON
Off-grid three-season cabin north of Parry Sound, Ontario. 24V/800Ah LiFePO4 + 2.4kW solar handles everything except December/January (propane generator fills the gap). 5 days autonomy accounts for cloudy November stretches.
Daily load
8,722 Wh
Daily Ah
363 Ah
Battery
2300 Ah LiFePO4
Solar
3200 W
Load budget
| Load | Watts | Qty | Hrs/Day | Wh/Day |
|---|---|---|---|---|
| Residential Fridge (Inverter) | 150 | 1 | 10 | 1,500 |
| Chest Freezer (Off-Grid) | 100 | 1 | 10 | 1,000 |
| LED Cabin Light | 5 | 8 | 5 | 200 |
| Ceiling Fan | 35 | 2 | 6 | 420 |
| Laptop | 60 | 2 | 4 | 480 |
| Starlink | 75 | 1 | 24 | 1,800 |
| WiFi Router | 10 | 1 | 24 | 240 |
| TV / Monitor | 60 | 1 | 3 | 180 |
| Washing Machine | 500 | 1 | 0.5 | 250 |
| UV Water Purifier | 40 | 1 | 1 | 40 |
| Well Pump | 750 | 1 | 1.5 | 1,125 |
| Security Camera | 8 | 2 | 24 | 384 |
| Motion Sensor Light | 15 | 1 | 3 | 45 |
| Coffee Maker | 900 | 1 | 0.25 | 225 |
| Electric Kettle | 1500 | 1 | 0.15 | 225 |
| Microwave | 1000 | 1 | 0.2 | 200 |
| Smoke DetectorCRITICAL | 1 | 1 | 24 | 24 |
| CO DetectorCRITICAL | 1 | 1 | 24 | 24 |
| Inverter Standby | 15 | 1 | 24 | 360 |
Battery bank
46 × 100Ah (2S23P) for 24V/2300Ah
Your daily consumption is 363Ah. With 5 days of autonomy, you need 1817Ah of usable capacity. LiFePO4 (Lithium Iron Phosphate) batteries should only be discharged to 80% depth of discharge, so you need 2271Ah of total capacity. We recommend a 2300Ah bank (46 × 100Ah (2S23P) for 24V/2300Ah), giving you 1840Ah of usable capacity — enough for 5 days without any charging.
Solar array
16 × 200W panels · 167A charge controller
Your daily consumption is 8722Wh. With 3.8 peak sun hours, a 75% system efficiency factor, and LiFePO4 (Lithium Iron Phosphate) round-trip efficiency of 96%, you need 3188W of solar panels. We recommend 16 × 200W panels (3200W total). This array will produce approximately 380Ah per day at 24V. You'll need a charge controller rated for at least 167A. MPPT recommended — higher efficiency at this array size.
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