Page 3 - Test Results
To evaluate the BLUETTI AC70, I put it through a series of tests. First, I measured its battery life in a drain test. In order to do this, I used an incandescent desk lamp that constantly draws 136W of power, as shown in the photo above. The AC70's screen showed 147W of output due to inverter loss. Still, we got 92.5% of the rated output, which is pretty good. The lamp shut off after 4 hours 58 minutes, which is 730.59Wh. This is 95% of the rated capacity, as the internal LiFePO4 battery is specified at 768Wh. The AC70 delivered as promised in this test.
The AC charging time is given at 2 hours in Standard mode, 45 minutes to 80% and 1.5 hours to 100% in Turbo mode, and 4 hours in Silent mode. These estimates seem accurate according to my tests.
The next test is using a MAXIMUM impact wrench. This is an 8.5A high power impact wrench that I use to loosen lug nuts off my car. The purpose of this test was to see if the BLUETTI AC70 can handle over 1000W of burst output. The AC70's screen showed instantaneous 1300W output when loosening a 95 lb-ft lug nut. The portable power station delivered with no issues, and Power Lifting mode was not required.
Here, I used a Vitamix blender to evaluate the BLUETTI AC70. The purpose of this test was to test high initial power draw that falls to a moderate sustained load. On start, the AC70 showed approximately 900W output, and quickly settled to roughly 450W with the blender operating at maximum speed. Once again, the portable power station delivered with no issues, and Power Lifting mode was not required.
Taking the BLUETTI AC70 upstairs, I dropped by my bathroom and connected my Conair hair dryer. The purpose of this test was to see how the portable power station worked with a high resistive load. The draw spiked to 1500W and the AC70 shut down with an error after about a second. Power Lifting mode was designed for this purpose, so I activated it and turned on my hair dryer once again. It worked, but the output was capped at 1000W, which meant the hair dryer was not able to deliver heat at full speed.
Lastly, I plugged my entire desktop setup along with a wireless access point to the BLUETTI AC70. This included a desktop PC, two monitors, keyboard, Audioengine HD3 speakers, Corsair iCUE LT100 RGB LED lighting, and an ASUS ZenWiFi XD6 Wi-Fi node. The purpose of this test was to test was to test variable power loads with sensitive electronic devices as well as its UPS function. The power output varied between 75W and 500W on the portable power station. All my computers and electronics functioned as if it was connected to the grid with no unintended effects.
I also tested the UPS mode to test if the AC70's response time was fast enough to sustain connected computers in the event of a power failure. This test was conducted by connecting the AC70 to a power strip with a switch. The power to the AC will be shut down at random intervals to see if my PC connected to the portable power station will shut down, restart, or otherwise experience interruptions. The AC70's rated response time of 20ms was fast enough to sustain power with no issues to the connected devices. It was completely seamless, and I can say the BLUETTI AC70 is fast enough to act as a UPS for your PC.
Overall, the BLUETTI AC70 power station delivered solid performance across the board in all my tests. Everything functioned pretty much exactly as designed, and the internal fan is quiet in all tested conditions.
Page Index
1. Introduction, Packaging, Specifications
2. A Closer Look - Hardware and Software
3. Test Results
4. Conclusion
