This is the first trip that I will be using my Power Station. DC Charging using the Vehicle 12V Adapter, the input watts indicator goes up to about 24w then drops to 11w then to 0w. This repeats about every 10 seconds but is not obviously charging the power station.
AC Charging via 120v Grid works perfect. Tested the outlet and ran a heavy duty Air Compressor that draws FAR more amps without issue. Voltage at the outlet with the vehicle running is about 14.1v as such indicating no issue with the 12v port or overall charging via AC. Testing was tried with both vehicle running and non running. As well tried on a second vehicle with same results.
I have seen in some posts online to “Turn off PV” as this may remedy this issue yet nowhere, including the owners manual, indicates how to do this, nor any explination as to what “PV” even is.
Any help is greatly appreciated as this is my first trip and at this point very dissatisfied if the only use requires Grid / Generator charging as I leave in the morning with a 12V fridge and no backup power.
PS: I do not have solar panels yet in order to try that option for DC charging …so no insight to that yet.,
Hi @Zeebra, We’d like to help troubleshoot the issue.
Have you registered and logged into the Bluetti app? Please log in and update all firmware to the latest version.
Does the app show any error messages while using car charging? If you have another car charging cable, please try using it to see if the issue persists—we’re concerned that the cable might be the problem.
If the issue remains unresolved, please send us a private message with your order details so we can arrange further assistance for you.
Thank you for the quick response… I just returned home from this weekends Camping adventure and found ( while out ) the issue. Apparently the rear 12V power outlets in Jeep Wranglers ( 2014 and 2016 … the two vehicles I tried it in ) are not able to withstand the amperage draw.
After discovering in the App that I could see voltage, amps and watts during charging, I observed that everytime the Amps got up to 8.4A of draw that the voltage would drop to around 8-9V even with the vehicle running and shut off the charging. My assumption is that the thin wiring is unable to handle a heavy draw and is meant more for things like phone chargers.
I ran 10g positive and negative wires from the battery ( fused at the battery with a 30A ) and this resolved the issue.
Hi @Zeebra, Thank you for your analysis; it seems very reasonable.
The awg of the cable is indeed a point we overlooked. We have shared your solution with the engineers, and it may help many customers facing the same issue in the future.
Just to confirm… when I stated the “thin wire” … I feel that is on the vehicles side no the provided power cables by Bluetti. LOL… its is a Chrysler product after all
Hi @Zeebra, Thank you for emphasizing this. This is a very effective troubleshooting method that helps us identify the root cause of issues for other customers as well.
I had exactly the same problem but I think with a different cause. My AC70 would charge normally with AC but when attempting to charge through my van’s cigarette lighter port it would repeatedly but only momentarily register various wattages then go to zero. I was able to charge the AC70 by wiring it directly to a bench top DC power supply so that ruled out a problem with the AC70. I then tried to use the DC power supply with the XT60 cable and failed - so obviously the DC cable is the problem. I opened up the bulb (cigarette lighter) end of the cable hoping to find a fuse. Unfortunately I found a small chip, which I assume is now a damaged surge protector of some sort. I don’t want to bypass this chip and since I can’t replace it I guess I’m on the hook for a new cable - but happy that the AC70 isn’t damaged. I hope this helps others with similar problem.
How did you wire the 10g cables and successfully charge the unit that way? I am attempting to do the dc solution directly from my camper battery bank but am having some issues. Did you use mc4 connectors and use the bluetti supplied mc4 to dc input?
Do you have a fuse between the 10 gauge cable run to the camper battery? Some inline DC fuses are trash and voltage fluctuates causing problems. The camper battery should be 24V and not 12V as this is the MINIMUM voltage required to charge say an Elite 200 V2, but that puts you at the lowest end of the spectrum and will be unstable. Your camper battery should be minimum 24V, ideally 48V. It all depends on what Bluetti power station you have and what PV range is. There is a minimum.
Let’s assume you have an Elite 200 V2 which around a 51V battery pack. The camper house battery at 48V and the 20A MPPT limit of the solar generator, you have theortical maximum of 48X20 OR 960W. Since the voltage has to step up to match the 51V, it becomes 960W ÷ 51V = 18.8A charging current to Bluetti (for the step up). 18.8X48= 902 watts charging max. A 48V battery would give you back 18.8A or 94% of its potential. Now if you had a 24V battery that only be 24X20 = 480W… 480 ÷ 51V = 9.4A, so 24X9.4A = 225W of charging.
If you have a 12V house battery, very lame…forget about it.
The AC70 requires 12V to 58V DC/ 500 Watts (W). 10 Amps (A). according to spec and I am only trying to slow charge it but direct connected to battery in my camper. Problem for me is the included cig adapter charger, gets hot and has been blowing the fuse in my truck. So I figured just keeping it simple I could just wire it directly to my 12v system. If i can get 100w charging off that I’d be satisfied, eventually I may install a Victron 12/24 20A DC Converter or possibly a small AC inverter for faster charging.
If you have the AC70 and “if” you turned on 10A charging, you likely need to turn down the 10A charging to 8.5A to prevent blowout/cigarette lighter from getting “too” hot. The reason why Bluetti had that 8.5A limit on old power stations (ex: EB70s) was exactly because of your problem. They have a 12v/24v Lead-acid Battery Charging Cable that has alligator clamps to XT60 but its currently out of stock. If you buy the one intended for AC180/AC60 that has the DC7909 barrel connector you can search for an XT60 to DC7909 (female) adapter if it exists, otherwise ensure your charging limit is 8.5A on the AC70 and not 10 in the advanced settings.
