Running a tiny home on solar is more practical than ever. Panels are cheaper than they've ever been, battery storage is compact enough to fit in a small utility closet, and a tiny home's energy footprint is small enough that a modest 1–2 kW system can cover most daily needs. Here's how to do it right.
How Much Power Does a Tiny Home Actually Use?
The average American home uses 10,500 kWh/year (~29 kWh/day). A well-insulated, efficient tiny home typically uses 3–7 kWh/day — roughly 1/5th the average. That's a completely different system-sizing problem, and it makes solar genuinely practical without a $50,000 investment.
| Appliance | Wattage | Hours/Day | Daily kWh |
|---|---|---|---|
| LED lighting (6 bulbs) | 60W | 4 | 0.24 |
| Mini-split AC (2-ton) | 1,500W | 4 | 6.0 |
| Refrigerator (compact) | 80W | 24 | 1.92 |
| Laptop + phone charging | 80W | 3 | 0.24 |
| Tankless water heater | 1,200W | 0.5 | 0.60 |
| Washer (small) | 500W | 1 | 0.50 |
| Daily Total | ~9.5 kWh |
Running AC is the wild card. In Oklahoma's heat, you might run a mini-split 6–8 hours during peak summer months. Plan for that, and your system can handle everything else easily.
Sizing Your Solar System
A simple formula for tiny homes: Daily kWh ÷ peak sun hours × 1.25 (efficiency buffer) = kW of panels needed.
Oklahoma averages about 5.5 peak sun hours/day. If you need 7 kWh/day:
7 kWh ÷ 5.5 hours × 1.25 = ~1,600W (1.6 kW) of panels
That's 4–5 standard 400W panels, which fit comfortably on even a small 200 sq ft roof.
Grid-tied: Panels send excess power to the grid; you pull from the grid at night or on cloudy days. No batteries needed — simpler and lower upfront cost.
Hybrid: Panels + batteries + grid connection. You use battery power first, grid power as backup, and sell excess back. Most resilient option. Recommended for tiny homes in areas with unreliable grid access.
Best Solar Panels for Tiny Homes on Amazon
Renogy 400W Monocrystalline Solar PanelTop Pick
Renogy is the benchmark brand for DIY solar in the tiny home community. Their 400W monocrystalline panels deliver 21%+ efficiency, come with a 25-year performance warranty, and are designed for easy parallel or series wiring. 4 of these (1,600W) covers most tiny home loads. Available as single panels or in multi-panel kits.
Check on Amazon →Renogy 200W Starter Kit (2 Panels + Controller + Cables)
For tiny home owners who want to start small and expand, this starter kit has everything you need except the battery and inverter. Two 100W panels, a 30A MPPT charge controller, and all the wiring — a good foundation to build a full system on over time.
Check on Amazon →EcoFlow DELTA Pro Portable Power Station (3.6 kWh)
The EcoFlow DELTA Pro is the best all-in-one battery + inverter solution for tiny homes. 3.6 kWh of storage (expandable to 25 kWh), a built-in 3,600W AC inverter, and compatibility with Renogy and other panels. This replaces the battery bank, inverter, and charge controller — simplifying your system significantly. Pricey, but it's plug-and-play solar storage.
Check on Amazon →Jackery Explorer 2000 Pro (2 kWh)
A step down from the EcoFlow DELTA Pro in capacity — 2 kWh vs 3.6 kWh — but significantly cheaper. Good for tiny homes with modest loads or those using propane for cooking and water heating. The Jackery solar generator ecosystem pairs well with their solar panels but also works with any panel brand.
Check on Amazon →Complete DIY System: What You Need
- Solar panels — 1,200–2,000W for most tiny homes (3–5 × 400W panels)
- MPPT charge controller — manages charging from panels to batteries; size to 120–150% of your total panel wattage
- Battery bank — 5–10 kWh for off-grid; 2–3 kWh for hybrid. Lithium (LiFePO4) is strongly preferred over lead-acid
- Inverter — converts DC battery power to 120V AC. Size to at least your largest single load (usually the mini-split at 1,500–2,000W)
- Wiring, fuses, and disconnects — don't cheap out here; this is where fires start
- Mounting hardware — roof mounts or ground mounts depending on your setup
Solar and Oklahoma Weather
Oklahoma's solar resource is excellent — consistently ranking in the top 20 states nationally. The main design challenge is hailstorms. All good solar panels are IEC 61215 certified to withstand hail up to 25mm at 60 mph — adequate for typical Oklahoma hail. For very severe storm events, look for panels rated to 35mm+ or consider tilt mounts that can be angled flat during high-wind warnings.
Related guides: Tiny home utilities guide · Year-round living in a tiny home · Best tankless water heaters for tiny homes