Hi, I spent the weekend installing a dual Charger1 setup in my Mercedes Sprinter 2019 van. Right away, I got the G003 error, I have latest firmware (IOT + ARM ) on both Charger1 and Adaptive monde on and off. Light is blinking twice red spaced by a second. The voltage provided by the smart alternator can change a lot (up to 15, 15.1 from what I read) but in my case it is pretty much 14.6-14.9v (both bluetti app and voltmeter give me the same reading).
It seems the Charger1 does not like it and provide no charging.
Are my Charger1s broken ?
Or is there a way that bluetti bypass the G0003 overcurrent error (should be overvoltage, no ?).
Or I am stuck with two useless expensive bricks ?
First Q. What are you trying to charge from the Charger 1?
If your power bank is small one like the AC2A, it has an input voltage limit of 28V, you need to set it from the App menu to that model power station, before connecting it to the power station. Here, idle the car with the Charger 1 connected, set the model or voltage. Then connect it to the power station. This is all explained in the Charger 1 user manual.
Next, if you are charging a different brand power station you need to set the Charger 1 output to no more than its DC input limit in custom settings.
Hi, I am connecting a bank of 2 48v 105Ah lifepo4 battery through à Victron lynx system. I set the output of the charger1 to custom 56v. I even tried directly to one of battery posts.
However, the error I get happens even if the battery disconnect is off, I even tried without any output cable on the charger1.
So from my understanding of the errorG003. it happens on the input side of the charger1, have nothing to do with the output?
So just to help me troubleshoot, I have some questions:
does the output have anything to do with the input overcurrent ? (To check if I have bad connection, blown fuse, bad cable, etc…)
If there is no output connection, does it trigger the G003 error?
is 14.8-14.9v at the input legit? I mean, the overcurrrent is an overcurrent error, not an over voltage ? (Maybe I went to the voltage route on this error because of another post on G003 where somebody talked about higher voltage).
First of all, the Charger 1 is not a LFP battery charger as such. It can be better described as a voltage transformer. It takes 13.8V @ 50A = 690W as an input. It then converts that to an output maximum of 560W at variable voltages between 15VDC and 56VDC at a fixed 10A. i.e. set to 25V @ 10A, you get 250W of output. or, set to 50V @ 10A you get 500W of output. Effectively giving a variable voltage output. This is then, under normal circumstances input to a power station, which has its own inbuilt MPPT solar controller to then charge that power stations battery.
Does your Lynx system have a DC to DC or a MPPT solar controller to charge your LFP bank? These items manage charge properly to a Lithium battery, the Charger 1 on its own won’t.
I assume you are getting the G003 error on your Victron Lynx system. In which case this is on the output side of the Charger 1. The Charger 1 only has LED indication.
As an example; I have 2 x 100Ah LFPs in my caravan, charged by a 25A Redarc DC-DC charger, powered by the 4x4 alternator. Its input voltage range is 9V to 32V max and at 375W output. This calculates to roughly 27 amps input + efficiency losses.
If I were to use the Charger 1 to power the Redarc, I would set the voltage output of the Charger1 to 30V to play safe. at this rate I would expect 300W of output with a input load of around 22A @ a nominal 13.8V alternator output.
In saying this, you need to establish what your Lynx system input voltage and current are.
Would I do the above, NO, Why? if I use the alternator to power the Charger 1 to then provide input to the Redarc, why not connect the Redarc direct to the alternator. (Rhetorical Q. lol) That’s what it’s designed to do and it’s far more efficient.
Sounds super frustrating! That G003 error is usually linked to overvoltage protection, not overcurrent, and your voltage readings (14.6–14.9V) are close to the upper threshold for some DC inputs. It doesn’t necessarily mean your Charger1 units are broken — Bluetti’s firmware is just very sensitive.
Try this:
Disable Adaptive Mode and manually set the input range if possible.
If you haven’t already, contact Bluetti support — they might offer a firmware patch or setting tweak.
You could also try a DC-DC buck converter to bring the alternator voltage down slightly.
You’re likely not stuck with bricks, but it may need a workaround to stay under that voltage ceiling.
Hi @Mandp, We’re pleased to inform you that we’ve released a firmware update (ARM v9077.06) to address this issue.
Here’s how to proceed:
Update your device to the latest firmware version
Navigate to Advanced Settings
Disable Adaptive Mode
This should resolve the problem efficiently.
We’d also like to extend our appreciation to @Mandp and @Alexxa for their valuable contributions to this discussion—community insights like these are incredibly helpful.
If you continue to experience any issues after updating, please don’t hesitate to contact our support team.
@BLUETTI_CARE I was already running ARM v9077.09 and IoT v9046.04.Already tried adaptive mode disabled and enabled.
@Mandp G003 error is the Input Overcurrent error appearing in the Charger1 bluetooth app. The Victron Lynx is only busbars and fuses to connect batteries and distribute power to inverter, from chargers, etc…, no electronic. So it is a direct connection to the batteries.
Alexxa , Tried Adaptive Mode enabled and disabled, both not making a difference. You are talking about manually setting the input range, i don’t see that anywhere, only output voltage. About buck converter, i was hoping to get the charger1 working by itself, might be a solution at some point. Gonna contact support for sure.
So anybody can try to run the Charger1 with the output not connected to see if they are getting a G003 Input OverCurrent ?
Hi @chauffeurdevan, Thank you for the efforts you’ve made to resolve the issue.
If none of these steps work, unfortunately, it cannot be resolved remotely — we’ll need to arrange a warranty service.
If you have any questions about how to reach the appropriate customer service team or concerns about the service process, please send us a private message with your order information so that we can arrange priority service for you.
Ok, was able to disconnect the smart function of the alternator (a shunt communicating to the ECU) on the negative terminal) so now voltage is constant 14.1v. Still get G0003 on the charger1. One last thing to test, is the negative black wire on charger1 input is not connected directly to the battery, but on the chassis ground under the passenger seat. Gonna try a direct connection on the negative battery terminal.
@Kipper now that I get the alternator stable 14.1v, and that I still get error G0003 Input Overcurrent, I’ll the units back to be fixed. The error happens even without any output connected. Spent way too much time trying troubleshooting this. So unless BLUETTI is telling me that in fact input overcurrent is output overcurrent I m not testing more before I send the units and get them back.
Hi guys and gals i too am having this issue, @chauffeurdevan is having I contacted @BLUETTI_CARE and received a new Charger 1 and did all the firmware updates however also get error ‘G003 - Input Overcurrent’ I have my Charger 1 wired across my battery on my 2010 VW transporter and the output side connected to my AC200Max, i have spoken to a good friend and mechanic and suggested a shunt of some sort but this sort of divoids the point. @BLUETTI_CARE please explain clearly what error code ‘G003 - Input Overcurrent’ means in lamens terms, as if speaking to a child, that way we can figure out a solution
@Audiotech1986 What is the voltage of your VW when it is running ? (Not sure if voltage is the problem)
Your first Charger1 was giving you the G003 and you got a fixed/new one, and still get the error ? Aaargh, not liking that - going in vacation with my sprinter in a month and need a working charger. Still waiting on Bluetti to give me info so i can send the units back for repair.
@Audiotech1986@BLUETTI_CARE Just spent an hour looking lots of videos of user with their Charger1. It looks like everybody have around 13.v to 13.8v in their car. In some video I saw that if voltage was over 13.6, the wattage getting out of the Charger1 was reduced. So it really feels the 14.9v i was getting when my merceded alternator is in smart mode is far from working voltage of the Charger1, even my 14.1v seems a bit far.
I look in the Charger1 manual, input voltage is not even a range, it’s just written 13.8v 50A.
Hi @chauffeurdevan, We’ve confirmed that your Charger 1 requires repair.
Have you already contacted customer service? If so, please provide us with your support ticket number so we can follow up on this matter.
yes i chatted with customer service, already have a case, said units will need to be repaired, they asked pictures of the ready to be shipped units, but still waiting an official mail with shipping labels.
They asked to provide all the wires, but told them one of the long 6awg is not getting out of my sprinter. Took hours to install them - need to remove both seats, remove all the relay/fuse system under the driver seat to open the busbar where the wire is tapping to the 12v. Then reinstall everything so i can use my sprinter until i get the units back. Then when i get them back, removed back the seat and relay/fuse system, re-bolt the bluetti 6awg wire into the busbar, fish the wire between the driver seat and passenger seat where the bluetti goes, and reinstall the fuse/relay system, reinstall the seats. So we are talking of 2-3 days of work just to send you a wire that you gonna send back to me anyway !
Did a test of vehicle electric system after 1 hour of engine tick over and vehicle produces 14.25v on tickover
Does anyone have any ideas what the range of the Charger 1 is?
@BLUETTI_CARE is there a way the Charger 1 could cope with this voltage or do we need to spend even more money and by a voltage regulator if so which one?