Portable power stations have exploded in popularity. Camping, emergency backup, remote work setups, van life — the use cases keep growing. Manufacturers advertise impressive capacity numbers and output figures. But how much power you actually get from one of these units in real-world conditions is a different story.

I tested five popular models over the past month, running common devices and measuring actual delivered capacity against advertised specs. The results were informative.

The Units Tested

• EcoFlow Delta 2 Max (2,048 Wh advertised, ~$2,800 AUD)
• Jackery Explorer 1000 Plus (1,264 Wh advertised, ~$1,900 AUD)
• Bluetti AC200MAX (2,048 Wh advertised, ~$2,700 AUD)
• Anker SOLIX F2000 (2,048 Wh advertised, ~$2,500 AUD)
• Goal Zero Yeti 1500X (1,516 Wh advertised, ~$3,200 AUD)

All prices are approximate Australian retail as of March 2026.

Understanding the Capacity Gap

Every portable power station delivers less usable energy than its advertised capacity. This isn’t dishonest — it’s physics. Several factors create the gap:

Inverter efficiency. Converting stored DC power to AC output wastes energy as heat. Most quality inverters are 85-92% efficient, meaning 8-15% of stored energy is lost in conversion. If you’re charging a laptop via USB-C (DC to DC), losses are lower.

Battery chemistry. Lithium iron phosphate (LiFePO4) batteries, which most modern stations use, have excellent cycle life but slightly lower energy density than lithium-ion NMC. More relevant is that manufacturers often spec capacity based on the total cell capacity, not the usable range. Most LiFePO4 systems won’t discharge below 5-10% to protect battery longevity.

Self-discharge. All batteries slowly lose charge over time. A unit sitting on the shelf for a month might lose 3-5% of its charge. Not a big deal day-to-day, but relevant for emergency backup use.

Temperature effects. Battery capacity drops in cold conditions. At 5 degrees Celsius, expect 10-15% less usable capacity than at 25 degrees. In an Australian summer, this isn’t usually a problem. For winter camping, it matters.

Real-World Results

I ran a standardised test: charge each unit to 100%, then power a known load until the unit shut down. The load was a combination of a laptop (65W continuous draw), a small fan (30W), and LED lighting (10W) — roughly 105W continuous.

Here’s what each unit actually delivered:

Model	Advertised Capacity	Actual Delivered (AC)	Efficiency
EcoFlow Delta 2 Max	2,048 Wh	1,762 Wh	86.0%
Jackery Explorer 1000 Plus	1,264 Wh	1,068 Wh	84.5%
Bluetti AC200MAX	2,048 Wh	1,789 Wh	87.3%
Anker SOLIX F2000	2,048 Wh	1,803 Wh	88.0%
Goal Zero Yeti 1500X	1,516 Wh	1,287 Wh	84.9%

The Anker unit delivered the best efficiency, the Jackery the worst — though all fell within a fairly narrow band. The key takeaway is to expect 84-88% of advertised capacity when running AC loads. For DC loads (USB charging), expect closer to 90-95%.

What Actually Matters in Practice

Raw capacity is one thing. Here’s what I found matters more in daily use:

Charging speed. The EcoFlow charges from 0-80% in about an hour via wall outlet. The Goal Zero takes nearly four hours for the same charge. If you need to top up quickly before a power outage or leaving for a trip, charging speed is crucial. The EcoFlow and Anker were clearly the fastest.

Fan noise. All of these units have internal cooling fans that activate under load. The Bluetti was noticeably quieter than the others — important if you’re using the unit in a tent or bedroom during a power outage. The Jackery was the loudest at medium loads.

Weight. These are “portable” in the sense that they have handles and you can carry them short distances. But at 20-28 kg, they’re not something you want to carry far. The Jackery, being the smallest capacity unit, was the lightest at 14.5 kg. If portability matters more than capacity, smaller units are worth considering.

Pass-through charging. The ability to charge the station while simultaneously powering devices. All five support this, but the EcoFlow and Anker handle it most gracefully — maintaining full output while charging without throttling.

App connectivity. Every manufacturer now has a companion app showing real-time input/output, remaining capacity, and configurable settings. The EcoFlow app was the best — clear interface, reliable Bluetooth connection, useful features. The Goal Zero app was buggy and disconnected frequently.

Solar Charging Reality

All five units accept solar panel input. Manufacturers advertise maximum solar input wattage, but actual solar charging depends on panel efficiency, sun angle, temperature, and shading.

With a 200W solar panel (the most common companion size), I measured actual input on a clear Sydney autumn day:

• Peak input: 150-170W (around noon, clear sky, panel angled toward the sun)
• Average across daylight hours: 90-110W
• Cloudy conditions: 30-60W

At an average of 100W solar input, charging a 2,000 Wh unit from empty takes roughly 20 hours of daylight. That’s 2-3 days of good weather. Solar charging is a supplement, not a primary charging method for large-capacity stations.

Who Should Buy What

For home emergency backup: The Anker SOLIX F2000 or EcoFlow Delta 2 Max. Large capacity, fast charging, and good efficiency mean you can keep essentials running during power outages. Either will power a fridge for 8-12 hours, run lights and charge devices for much longer.

For camping and outdoor use: The Jackery Explorer 1000 Plus if you prioritise portability, or the Bluetti AC200MAX if you want quiet operation. Weight matters when you’re loading a car, and fan noise matters when you’re sleeping nearby.

For remote work setups: The EcoFlow Delta 2 Max. Fast charging, good app, and pass-through capability make it practical for working from locations with unreliable power.

For budget-conscious buyers: The Anker SOLIX F2000 offers the best value — highest efficiency, competitive pricing, and strong build quality.

What I Wouldn’t Recommend

The Goal Zero Yeti 1500X is hard to justify at its price point. It’s the most expensive unit tested, doesn’t offer the most capacity, charges slowly, and the app experience is poor. Goal Zero has strong brand recognition from years in the market, but the competition has caught up and passed them.

Any unit without LiFePO4 battery chemistry. Some older or budget models still use lithium-ion NMC cells, which have fewer charge cycles (500-800 vs 3,000+ for LiFePO4) and degrade faster. Check the battery type before buying.

Final Thoughts

Portable power stations are genuinely useful tools, but go in with realistic expectations. Budget for 85% of advertised capacity, don’t expect solar panels to fully recharge large units in a single day, and prioritise charging speed and weight based on your actual use case rather than chasing the biggest capacity number.

The technology has improved dramatically in the past two years. Prices are dropping, capacities are increasing, and LiFePO4 has become standard. If you’ve been considering one, 2026 is a reasonable time to buy — though waiting six months will likely get you slightly better specs at the same price. That’s always the case with consumer tech.