What Size Solar Generator Do You Need for Overlanding?

What Size Solar Generator Do You Need for Overlanding?

A solar generator is one of the most important pieces of overlanding gear — but the wrong size will leave you frustrated. Here's how to pick the right one.

What Is a Solar Generator?

A solar generator combines a battery pack + inverter + charge controller in one unit. Pair it with solar panels and you have clean, silent power anywhere — no fuel required.

Step 1: Calculate Your Power Needs

List everything you plan to power and for how long:

Device Watts Hours/day Wh/day
Portable fridge 40–60W 24 hrs ~960–1,440 Wh
Phone charging 20W 2 hrs 40 Wh
Laptop 60W 3 hrs 180 Wh
LED camp lights 10W 4 hrs 40 Wh
CPAP machine 30–60W 8 hrs 240–480 Wh
Typical total ~1,500–2,200 Wh/day

Step 2: Match to a Generator Size

Capacity Best for Example use
500–700 Wh Day trips, phone/laptop charging Light weekend use, no fridge
1,000–1,500 Wh 1–2 night trips with fridge Most weekend overlanders
2,000–3,000 Wh Multi-day trips, full setup Serious overlanders, all appliances
3,000+ Wh Extended expeditions Full-time overlanding, AC unit

Rule of thumb: Choose a generator with at least 1.5x your daily Wh needs to account for inefficiency and cloudy days.

Step 3: Factor In Solar Panel Input

Your generator is only as good as your ability to recharge it. Match panel wattage to your generator:

  • 500–700 Wh generator: 100–200W of panels
  • 1,000–1,500 Wh generator: 200–400W of panels
  • 2,000+ Wh generator: 400W+ of panels

Most overlanders recharge via solar during the day while driving or stationary at camp.

Top Features to Look For

  • LFP (Lithium Iron Phosphate) battery — longer lifespan, safer chemistry
  • AC output wattage — must exceed your highest-draw appliance
  • MPPT solar charging — more efficient than PWM
  • Expandable battery — allows you to add capacity later
  • Pass-through charging — use power while charging

Our Recommendation

For most overlanders running a fridge, lights, and devices on 1–3 night trips, a 1,000–2,000 Wh generator with 200W solar input is the sweet spot.

Shop Solar Generators →

Not sure which model fits your setup? Reach out — we'll help you match the right generator to your gear list.

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