In This Guide
Solar Panels
Most tiny homes need 400–1,200 watts of solar depending on climate, usage, and whether you're running AC. Oklahoma's sun hours are excellent — averaging 5.5–6 peak sun hours per day, one of the best in the region.
100W Monocrystalline Panels (Starter Kit)
For a basic off-grid setup — lights, phone charging, small fridge, and a fan — a 400W system (4×100W panels) is your entry point. Monocrystalline panels are the most efficient per square foot.
Shop 100W Panels →200W Rigid Solar Panels
The workhorse panel for most tiny home roof installations. A 4×200W setup (800W total) powers a full tiny home with efficient appliances — fridge, lights, fans, phone/laptop charging, and occasional power tools.
Shop 200W Panels →Flexible Solar Panels (Metal Roof)
For curved or standing-seam metal roofs where rigid panels won't mount cleanly. Slightly less efficient but adhesive-mount installation is much simpler. Good for THOW (tiny home on wheels) applications.
Shop Flexible Panels →Battery Banks
Lithium iron phosphate (LiFePO4) batteries are the only real choice for tiny home off-grid in 2026. They last 10x longer than lead-acid, weigh half as much, and can discharge to 80–100% without damage.
100Ah LiFePO4 Battery
The standard building block for tiny home battery banks. One 100Ah 12V battery gives you ~1.2kWh of usable storage. Most tiny homes need 2–4 of these in parallel for a full day of autonomy.
Shop 100Ah LiFePO4 →200Ah LiFePO4 Battery
Better value per amp-hour than two 100Ah batteries in most cases. Two 200Ah batteries in parallel gives you ~4.8kWh usable — enough for 1–2 cloudy days of normal tiny home usage.
Shop 200Ah LiFePO4 →Inverters & Charge Controllers
MPPT Charge Controller
MPPT controllers capture 20–30% more energy from your panels than PWM controllers. Non-negotiable for any system over 200W. Size it to handle your full panel array wattage plus 25% headroom.
Shop MPPT Controllers →Pure Sine Wave Inverter (2000W)
Converts your 12V DC battery bank to 120V AC. Pure sine wave only — modified sine wave damages sensitive electronics. A 2000W inverter handles most tiny home loads; size up to 3000W if you're running a microwave or power tools simultaneously.
Shop Pure Sine Inverters →Backup Generators
2000W Inverter Generator
Every off-grid tiny home needs a backup generator for extended cloudy periods. A 2000W inverter generator is quiet enough for residential use, fuel-efficient, and handles battery charging plus critical loads simultaneously.
Shop Inverter Generators →How to Size Your System
Use this simple daily load calculation:
| Appliance | Watts | Hours/Day | Wh/Day |
|---|---|---|---|
| LED lights (6 bulbs) | 36W | 5h | 180Wh |
| Compact fridge | 45W avg | 24h | 1,080Wh |
| Laptop | 60W | 4h | 240Wh |
| Phone charging | 10W | 2h | 20Wh |
| Fan (ceiling) | 30W | 8h | 240Wh |
| Induction cooktop | 1,800W | 0.5h | 900Wh |
| Total | ~2,660Wh |
For ~2,660Wh/day in Oklahoma (5.5 peak sun hours): you need ~500W of panels and ~300Ah of LiFePO4 battery for 1.5 days of autonomy. Add AC and that jumps significantly.
Full System Cost
| Component | Budget | Mid-Range |
|---|---|---|
| Solar panels (800W) | $400–$600 | $700–$1,000 |
| LiFePO4 batteries (400Ah) | $700–$900 | $1,000–$1,400 |
| MPPT charge controller | $80–$120 | $150–$250 |
| Pure sine inverter (2000W) | $150–$200 | $250–$400 |
| Wiring, fuses, mounts | $150–$250 | $300–$500 |
| Backup generator | $400–$600 | $700–$1,000 |
| Total | $1,880–$2,670 | $3,100–$4,550 |