Inverters

What Is an Inverter?

An inverter converts DC power (from a battery or solar system) into AC power, which is what most household appliances and electronics use.

Plain Talk: 🔋 Battery power → ⚡ Inverter → 🏠 Usable household electricity

Inverter Power Ratings (Watts)

Inverters are rated by watts, which indicates how much power they can supply at one time.

Always add up the wattage of devices you plan to run at the same time.

Common inverter sizes and some standard usage:

Pure Sine Wave vs Modified Sine Wave

Pure Sine Wave (Recommended)

  • Safe for all electronics

  • Required for CPAPs, medical devices, laptops, TVs, fridges

  • Quieter and more efficient

  • Slightly more expensive

Modified Sine Wave

  • Works for simple loads only (lights, fans)

  • Can damage sensitive electronics

  • Causes buzzing, heat, or reduced lifespan

  • Not recommended for most modern devices

Bottom line: If you’re unsure, choose pure sine wave.

Battery & Inverter Matching

Inverters draw high current from batteries.

Example:

A 1000W inverter at 12V can draw 80–100 amps under load.

Important considerations:

  • Battery must support high discharge rates

  • Larger inverters require:

    • Larger batteries

    • Thicker cables

    • Proper fusing

  • Small batteries + large inverters = short run times

How Long Will an Inverter Run?

Runtime depends on:

  • Battery capacity (Ah or Wh)

  • Inverter efficiency

  • Load wattage

Example:

  • 12V 100Ah battery ≈ 1280Wh

  • 500W load → ~2 hours (real-world)

Device Startup Surge

Refrigerator 2–3× running watts

Microwave 1.5–2× running watts

Power tools 2–3× running watts

Always choose an inverter with enough surge capacity.

Safety & Installation Notes

✔ Use properly sized cables
✔ Install a fuse or breaker near the battery
✔ Provide ventilation — inverters produce heat
✔ Turn inverter off when not in use to avoid battery drain

Do You Always Need an Inverter? The simple answer is NO.

You need an inverter if:

  • You want to run standard AC outlets

  • You use household appliances

You may not need one if:

  • You only use USB or 12V DC devices

  • You want maximum efficiency

Battery Reality Check (Important)

Running the device ≠ running it for long

Example:

  • 12V 100Ah battery ≈ 1280Wh

  • 1000W inverter running microwave → ~1 hour total runtime (spread over uses)

Large inverters require large batteries.

⚠️ Disclaimer

Inverter sizing and runtime estimates vary based on load, battery chemistry, and system design.

300W Inverter

✔ Can run:

  • Phone chargers

  • Tablets

  • Laptops

  • LED lights

  • Wi-Fi router

  • Small fan

  • Most fish tank pumps

  • Some air purifiers

  • A small TV (like a 55-inch LED/LCD)

  • Portable coolers

  • Drone equipment

❌ Cannot run:

  • Microwave

  • Coffee maker

  • Refrigerator

  • Power tools

Best for: Basic electronics and light loads

500W Inverter

Everything a 300w inverter (PLUS)

✔ Can run:

  • Game consoles

  • Desktop computer

  • Small TV (under 50")

  • CPAP machine (without humidifier)

  • Aquarium or fish air pump

  • DVD and Blu-ray players

❌ Cannot run:

  • Microwave

  • Toaster

  • Space heater

  • Hair dryer

Best for: Medical devices, office gear, entertainment

1000W Inverter

Everything a 500w inverter (PLUS)

✔ Can run:

  • Nebulizers (pure sine wave recommended)

  • Microwave (700–900W models)

  • Coffee maker (single-serve - check watts)

  • Blenders (check watts)

  • Small blenders (check watts)

  • Portable chargers.

  • Small refrigerator (most energy-efficient models)

  • Sump pump (short bursts)

  • Power Tools

⚠️ May struggle with:

  • Fridges starting at the same time as other loads

  • Power tools with high startup surge

Best for: Camping, RVs, backup power

1500W Inverter

Everything a 1000w inverter (PLUS)

✔ Can run:

  • TVs

  • Phones

  • Cameras

  • Speakers

  • Toasters (check watts)

  • Full-size refrigerator

  • Freezer

  • Vacuum cleaner

  • Power tools (drills, saws)

  • Induction cooktop (single burner)

❌ Cannot run:

  • Space heaters

  • Central AC

  • Electric stove

Best for: Home backup essentials

2000W Inverter

✔ Can run:

  • Microwave ~1000W (check for surge)

  • Refrigerator + small appliance simultaneously

  • Microwave + coffee maker (not together)

  • Washing machine (cold water)

  • Medical equipment

  • Larger power tools

⚠️ Watch battery drain — high current draw

Best for: Off-grid cabins, emergency backup

3000W Inverter

✔ Can run:

  • Refrigerator, freezer, and lights together

  • Window AC unit (small)

  • Well pump (short runtime)

  • Multiple power tools

  • Multiple kitchen appliances (managed use)

❌ Cannot run:

  • Central AC

  • Electric dryer

  • Whole-house loads

Best for: Serious off-grid or mobile power setups

Affordable

Sustainable power for camping, connection, and life’s surprises.

Solar
Power

info@biggirlsolar.com

No phone - just email

© 2025. All rights reserved.