What Size Solar Generator Do I Need for My Home?

Looking to power your home with a solar generator, but not sure what size you need?

You’re not alone.
Sizing a solar generator is the #1 question homeowners ask — and getting it right means avoiding power failures or overpaying for unused capacity.

In this guide, we’ll break down:

• ✅ What “size” really means (Wh vs W)

• ✅ How to calculate your home’s energy needs

• ✅ Which models are best for whole-home backup, partial coverage, or essentials-only use

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⚡ What Does "Size" Mean in Solar Generators?

When shopping for a solar generator, size refers to two things:

Feature	What It Means
Battery Capacity (Wh)	How much energy it can store (for runtime)
Inverter Output (W)	How much power it can deliver at one time (for appliances)

Think of it like your car:
The battery capacity is the size of the gas tank.
The inverter output is how much horsepower you have.

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🧮 Step 1: Estimate Your Daily Energy Needs

To size your solar generator correctly, you need to total the watt-hours (Wh) for the devices you want to power.

Appliance	Power Draw	Daily Use	Total Energy (Wh)
Refrigerator	150W	10 hrs	1,500Wh
Wi-Fi Router	20W	24 hrs	480Wh
CPAP Machine	40W	8 hrs	320Wh
LED Lights (4)	40W total	5 hrs	200Wh
Laptop + Phones	80W	4 hrs	320Wh

Total: ~2,820Wh per day

💡 You’ll also want to factor in 15% energy loss from inverters and charging.

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🏠 Common Use Case Scenarios

Here’s a quick reference chart for sizing:

Use Case	Recommended Size (Battery)	Output Needed (Inverter)	Recommended Models
Essentials Only (fridge, lights, CPAP)	1,500–3,000Wh	1,000–2,000W	Jackery 2000 Plus, Bluetti AC200MAX
Partial Home Backup	3,000–5,000Wh	2,000–3,600W	EcoFlow Delta Pro, Anker SOLIX F2000
Whole-Home Backup	5,000–10,000+Wh (expandable)	3,600–7,200W	EcoFlow Delta Pro + Extra Battery

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☀️ Add Solar Panels to Extend Runtime

Solar panels allow you to recharge your generator daily and go completely off-grid.

• 400W panel = ~2,000Wh/day in good sun

• Match your panels to your generator’s input wattage (not just battery size)

Example:
The EcoFlow Delta Pro supports up to 1,600W solar input — that’s 4x 400W panels for fast recharging.

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🔥 High-Margin Models to Recommend

These options provide strong upsell value with high performance + long-term reliability:

✅ EcoFlow Delta Pro – Best for Whole Home

• 3,600Wh base, expandable to 25,000Wh

• 3,600W inverter (surge 7,200W)

• Solar input: 1,600W

• EV-level battery, smart app, and home integration ready

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✅ Bluetti EP500Pro – Best for High Power Appliances

• 5,100Wh battery

• 3,000W pure sine wave inverter

• UPS mode + smart app

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✅ Anker SOLIX F2000 – Best Smart Features for Partial Backup

• 2,048Wh battery

• 2,400W output

• App tracking, fast solar input, quiet operation

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🧠 FAQ: What People Also Ask

🔹 How big of a solar generator do I need to power a house?

For whole-home use, look for 5,000Wh+ battery capacity and 3,000W+ output. Consider expandable models like EcoFlow Delta Pro.

🔹 Can I run a refrigerator and freezer with a 2,000Wh solar generator?

Yes — for about 10–15 hours depending on energy efficiency. Add panels to recharge daily.

🔹 What happens if my generator is too small?

You’ll either trip the inverter (power cut) or run out of battery too quickly during an outage.

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✅ Final Verdict: Know Your Needs Before You Buy

A solar generator is a long-term investment. Sizing it correctly ensures:

• ⚡ You power what you need — without surprise outages

• 🔋 You don’t overpay for unused capacity

• 🔧 You can expand later with extra batteries or panels

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Want help finding the perfect match?

👉 Talk to the VoltAura.solar team — we’ll build a custom quote based on your home, lifestyle, and power needs.