Bluetti EB70 Portable Power Station
I recently purchased the new Bluetti EB70 Portable Power Station, and wanted to test it with my National Luna 90 Twin refrigerator in normal operating conditions. Power station reviews typically use a fridge indoors at a near constant temperature, which is easily comparable and repeatable. But that doesn’t give results under typical conditions. These are my results, with my refrigerator in my vehicle. Yours may vary.
The Bluetti EB70 Power Station is their new Lithium Iron Phosphate (LiFePO4) chemistry battery with 716WH capacity and 700W rated wattage, with 2500+ cycles until reaching 80% capacity. Most (all?) other power stations use Lithium Ion (Li-ion) batteries which have a life of around 500 cycles until reaching 80% capacity. All for less than the cost of a Jackery 500!
I charged the EB70 overnight, using the AC brick charger. The National Luna 90 Twin refrigerator was pre-cooled to 37°F (3°C) on AC power for two days, and contained my typical “empty but cold” load of nine 1/2 gallon containers of water, This is what I have in the SUV all summer to limit cycling of the refrigerator’s compressor. The refrigerator is on the rear cargo area of my SUV, and the EB70 was in the rear passenger footwell to avoid direct light. The refrigerator is covered with an old lap quilt to limit direct solar heating. My SUV is black, with factory tinted windows, so it gets hot inside in direct sun. No solar charging or engine charging via the supplied cigarette lighter outlet was used. Only the EB70’s internal battery.
This test was performed from noon Saturday, May 15 until the refrigerator shut off at 6:50AM Monday, May 17. Overnight lows were 42°F and 50°F, while daily highs were 72°F and 68°F. I did not monitor the temperature inside the SUV.
The results were a run time of 42 hours 50 minutes. Theoretically, this means that the refrigerator used an average of 17 Watts per hour. (716/42.83=16.72) This was a little less than I expected based on controlled testing using the same refrigerator. (See attached image) With the same temperature settings, but with an empty refrigerator, and under more severe conditions (12 hours at 70°F, 7 hours at 90°F, and 5 hours at 109°F), typical in a closed vehicle in direct sun midsummer, they averaged 14Watts per hour (27.7Ah X 12V /24 hours =13.85) In my cooler testing, I expected over 48 hours.
I plan to run this same test again in a couple of months when the interior temperatures will be much higher. Hopefully, it will still maintain power to the refrigerator for at least 30 hours. That would allow some charging while driving.
I currently have the EB70 connected to the AllPowers SunPower 100W flexible mono-crystalline solar panel on top of our Hiker Trailer. It isn’t optimal, in that it isn’t pointed at the sun, and is in shade a sizable portion of the day, but I can at least see how much charge it puts into the Bluetti EB70. Early AM showed 3-10 Watts, mid day the highest I saw was 74 Watts, and by late afternoon it was back down under 10 Watts. That’s not going to help much.
Ideally, a Bluetti SP200 portable solar panel would be a great addition, because it can be located in the sun, and with the adjustable angle, it can charge at peak power. Maybe Bluetti will put these on sale!
Overall, I’m happy so far. The only dislikes are the nearly invisible lights that indicate that the AC or DC output is turned on, and the lack of charge/discharge percentage and remaining time, instead relying on 20% increment bars. That screen can’t take much power. Leave it on while charging, Bluetti!
Links
Bluetti EB70 Power Station:
Bluetti eb70 - https://www.bluettipower.com/pages/bluetti-eb70
Bluetti SP200 Solar Panel:
https://www.bluettipower.com/.../bluetti-sp200-200w-solar...
National Luna 90 Twin Refrigerator:
https://www.equipt1.com/.../pro.../90l-legacy-fridge-freezer
Bluetti