Coachmen Freelander Class C — Dual AGM Weekender
rv · 12V system · Yellowstone, WY
29-foot Class C motorhome with the stock dual-AGM house bank (220Ah). Short trips with minimal boondocking — 2 days autonomy is the sweet spot between hookups or a genset run.
Daily load
1,673 Wh
Daily Ah
139 Ah
Battery
600 Ah AGM
Solar
600 W
Load budget
| Load | Watts | Qty | Hrs/Day | Wh/Day |
|---|---|---|---|---|
| RV Fridge (12V) | 50 | 1 | 12 | 600 |
| Furnace Blower | 30 | 1 | 6 | 180 |
| Interior LED Strip | 12 | 1 | 4 | 48 |
| LED Cabin Light | 5 | 4 | 4 | 80 |
| TV / Monitor | 60 | 1 | 3 | 180 |
| Laptop | 60 | 1 | 2 | 120 |
| WiFi Router | 10 | 1 | 24 | 240 |
| Freshwater Pump | 60 | 1 | 0.5 | 30 |
| Roof Vent Fan | 15 | 1 | 6 | 90 |
| Phone Charger | 10 | 2 | 2 | 40 |
| CO DetectorCRITICAL | 1 | 1 | 24 | 24 |
| LP Gas DetectorCRITICAL | 1 | 1 | 24 | 24 |
| Backup Camera | 5 | 1 | 1 | 5 |
| Step Light | 3 | 1 | 4 | 12 |
Battery bank
3 × 200Ah in parallel
Your daily consumption is 139Ah. With 2 days of autonomy, you need 279Ah of usable capacity. AGM (Absorbed Glass Mat) batteries should only be discharged to 50% depth of discharge, so you need 558Ah of total capacity. We recommend a 600Ah bank (3 × 200Ah in parallel), giving you 300Ah of usable capacity — enough for 2 days without any charging.
Solar array
3 × 200W panels · 63A charge controller
Your daily consumption is 1673Wh. With 4.5 peak sun hours, a 75% system efficiency factor, and AGM (Absorbed Glass Mat) round-trip efficiency of 83%, you need 597W of solar panels. We recommend 3 × 200W panels (600W total). This array will produce approximately 169Ah per day at 12V. You'll need a charge controller rated for at least 63A. MPPT recommended — higher efficiency at this array size.
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