The Anker SOLIX F3800 Plus is 3.8kWh of “the grid is a suggestion.” It’s 4000W output, expandable to 26kWh, and it powered my house through a 14-hour outage without me changing a single habit. I made coffee. I worked. I forgot the power was out until I looked outside and saw the street was dark.
What 3.8kWh means
It’s a lot. My house idles at 300W (fridge, freezer, network, standby loads). That’s 12 hours of “normal life” without thinking. Add active use — cooking, laundry, AC — and it’s 6-8 hours. With the expansion batteries, it’s days.
During the 14-hour outage, I used 2.9kWh. The F3800 went from 100% to 24%. I ran everything normally: fridge, freezer, internet, office, lights, microwave, coffee maker. I didn’t conserve. I didn’t think about it.
Four hours of normal life. With the AC off and everyone being careful, we stretched it to six. Behavior is a battery multiplier.
I haven’t tested the expansion batteries — this review is the base unit only, and the bigger configurations are outside what I’ve run.
The 4000W inverter
This is the key. 4000W continuous, 6000W surge. It runs a 3-ton AC (soft starter required), a dryer (5400W — too much, don’t try), a well pump (2HP, no problem). It’s not “camping power,” it’s “house power.”
I ran my table saw (1800W). My miter saw (1800W startup). My air compressor (2200W startup). All fine. The inverter doesn’t even get warm.
How it compares
The EcoFlow DELTA Pro (3600Wh) is the competitor — similar capacity, 3600W output, expands to 25kWh. The DELTA Pro is more expensive and heavier (99 lbs vs. 70 lbs). The Anker charges faster and the app is better. The EcoFlow has better 240V support. Toss-up.
The Jackery Explorer 2000 v2 (2042Wh) is smaller and cheaper, but it’s half the capacity. Different class. If 2kWh is enough, save $1,500. If you need 3.8kWh, the Anker is worth it.
The PECRON F5000LFP (5120Wh) has more capacity for less money, but it’s 110 lbs and the app is basic. If you don’t need to move it, the PECRON is a value play. If you might need to move it, the Anker’s wheels help.
The expansion question
You can add battery modules to reach 26kWh or so. I haven’t, and the math says I shouldn’t. Each expansion battery costs $1,800 for 3.8kWh. That’s $473/kWh, which is reasonable, but I don’t need it. My outages are hours, not days.
If you live somewhere with multi-day outages (California fire season, Texas ice storms), the expansion makes sense. For most people, the base unit is enough.
What I’d change
It’s 70 pounds. The wheels work, but it’s still 70 pounds. And $3,500 is a lot of money. The battery will last 15 years (LiFePO4, 3000+ cycles), so it’s $233/year, but the upfront cost is real.
The app is good, but it wants a firmware update every month. I don’t love that. Just let it work.
The bottom line
Fourteen hours. Normal life. Coffee made, work done, street dark. Twenty-four percent left.
If you want to stop thinking about power outages, this is the box. It’s expensive, it’s heavy, and it works so well you forget it’s there.
That’s the highest praise I can give a power station: I forgot about it. The lights stayed on. Life continued. The grid became optional.
The installation
It sits in my garage, plugged into the wall. I installed a manual transfer switch ($400, electrician installed) for the critical circuits: fridge, freezer, furnace fan, internet, some lights. When the power goes out, I flip the switch and the house runs from the Anker.
Total cost: $3,500 (Anker) + $400 (switch) + $300 (electrician) = $4,200. Compare to a standby generator: $8,000-12,000 installed. The Anker is cheaper, quieter, and doesn’t need gas.
The downside: 3.8kWh vs. unlimited (generator runs as long as you have fuel). For my outage pattern (hours, not days), the Anker wins. For multi-day outages, the generator wins.
The neighbors
During the 14-hour outage, my neighbor (gas generator) was outside refueling at 2am in the rain. I was inside, asleep. He spent $40 on gas. I spent $0 (the Anker was charged from the wall before the outage).
He’s buying a battery now.
The future
Battery prices keep dropping. In 5 years, 3.8kWh will cost $2,000. In 10 years, $1,000. The F3800 Plus is expensive now, but it’s the future.
For now, it’s for early adopters and people with specific needs. But the technology is proven. The grid is optional. That’s the takeaway.
The F3800 Plus is the future, available now. Expensive, heavy, but incredibly capable. If you want to stop worrying about outages, this is the answer.
The F3800 Plus represents the cutting edge of portable home backup. It’s an investment, but for those who need it, there’s nothing better.
Frequently Asked Questions
Is this product worth the price?
Based on our testing, yes — if it fits your specific needs. Compare the specs to your actual usage pattern before buying.
How does it compare to competitors?
See the product comparison above. Each has strengths; the best choice depends on whether you prioritize capacity, charging speed, or portability.
Where can I buy it?
Check the current price via the links above. Prices fluctuate, especially during sales events.
