Portable Power Station Sizing Guide – How to Choose | JIEYO

June 26, 2026

Table of Content

Intro

Most people start by asking for a price. That’s the wrong question.

The right question is: what do I need to run, and for how long?

This guide helps you figure that out — so you pick the right size without overpaying.

The Basic Formula – Calculate It Yourself

Runtime (hours) = Capacity (Wh) × 0.85 ÷ Device Power (W)

0.85 accounts for inverter efficiency loss. This is a standard industry calculation.

Example: A 1152Wh station running a 150W fridge:
→ 1152 × 0.85 ÷ 150 = 6.5 hours

What Do Your Devices Actually Need?

Here are typical wattages for common appliances. Check your own device label for the exact number.

Appliance	Typical Wattage
LED light bulb	5-15W each
Phone charger	5-20W
Laptop	30-100W
TV (32-42 inch)	50-120W
Stand fan	50-100W
Refrigerator	150-400W
1HP inverter AC	730-850W
1HP non-inverter AC	900W+
1.5HP inverter AC	1,000-1,100W
Rice cooker	600-1,000W

Inverter ACs use significantly less power than non-inverter models. Check your label.

How Long Will It Last? – Two Different Questions

When people ask “how long does it last”, they’re asking two different things:

1. How many hours can it run my devices?
This depends on which model you choose. The table below shows estimated runtime for each model with common devices.

2. How many years will the battery itself last?
Our LiFePO₄ batteries are rated for 8,000 cycles at 80% DoD. For most users, that means 8-10 years of regular use.

Quick Reference – Which Model Fits Your Needs?

Model	Power / Capacity	Best For	Estimated Runtime
JYE500-1005	500W / 1005Wh	Lights, phone, laptop, fan	Fan: ~14hrs / Laptop: ~17hrs
JY1K1152	1200W / 1152Wh	Fridge + fan + TV (overnight)	Fridge: ~6.5hrs / All together: ~5-6hrs
JY2K2304	2200W / 2304Wh	Multiple appliances (full day)	Fridge: ~13hrs / Mixed: 8-12hrs
JY3K2688	3000W / 2688Wh	1HP inverter AC	AC: ~2.5-3hrs
JY3K3200	3000W / 3200Wh	1HP inverter AC (longer)	AC: ~3-3.5hrs
JY5K5376	5000W / 5376Wh	1.5HP inverter AC or shop use	AC: ~4-5hrs / Mixed: 5-8hrs
JY3K8038	3600W / 8038Wh	Heavy loads, extended use	Mixed: 6-10hrs depending on load

These are estimates. Actual runtime varies based on your specific device wattage.

Two Things That Determine Battery Life

1. Cycle life
Our LiFePO₄ cells are rated for 8,000 cycles at 80% DoD. For most users, that means 8-10 years of regular use.

2. How you use it
The same battery can last twice as long depending on how you use it:

Recharge before it’s completely empty → longer life
Drain it to 0% every time before charging → shorter life

Still Not Sure Which One Fits?

Not everyone wants to do the math. That’s fine.

Tell us:

Which country you’re in and your local climate
What devices you need to run (and for how long)
AC or DC only?
Your budget range

We’ll recommend a model and build a custom configuration — no unnecessary features, no upselling, just what you actually need.

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