@BLUETTI Is it possible to use the D40 charger connected to the AC200L to charge the AC240 battery using the AC240 DC/PV input or other inputs?.
So,
1: Connect D40 to the AC200L 48v DC port
2: from the D40 DC output, connect an anderson connection to the DC/PV input on the AC240
Notes:
a) I understand it will convert 48 to 12v.
b) I only have one solar array, connected to AC200L as it can handle up to 145vdc, unlike the AC240… Hence when Ac200L is at 100%, I want to charge the AC240 with excess energy
c): I understand I can also connect the AC charging cable from AC200L to AC240 (but seems more efficient to do DC to DC) also, I would do the AC charging cable option when in a pinch.
d: I do not know if there is a cable that can connect from the D40 anderson plug to the DC/PV input type plug
thanks, just to follow up.
1: I’d want to connect to the DC/PV input of the AC240 which hold 21amps… so 12v at 20amps would be 240nominal give or take. this since the D40 is 30amps. Am I correct on this? or what am I missing
2: Not sure about the XT60 to MC4 cable. The D40 has an Anderson plug… so should I not get an Anderson to MC4 or an Anderson to Aviaton plug? Can you let me know… So its straight from D40 ANderson connector to the PV/DC input of the AC240
note#2: I understand I can use the Aviation to MC4 cable that comes with the AC4. so Anderson to MC4 could work. but rather have it direct Anderson to Ac240.
No, because it will limit current to about 8.2A below 30V, not above 30V.
To ensure safety and avoid overloading, many devices will limit the current to between 8A-8.5A. Exceeding this current may overload the vehicle’s circuits and may even trigger a blown circuit or blown fuse.BLUETTI actively limits the charging power in order to protect the vehicle. This means that even if you use a 20A D40 charge controller, you will only be able to enter a current of around 8.2A.
Yes. Sorry for the mistake yesterday, it does take an Anderson-MC4 connector.
@BLUETTI Another question related to both AC200L and AC240.
I have tried several times to Charge the AC200L using the AC charging cable, connected to the AC output of the AC240… basically using the AC240 as the “grid” source for the AC200L… it does not work.
The other way around is not a problem, meaning using the AC200L as the “grid” source for the AC240 works perfectly.
What is the difference? both should be seen regular AC output, and the charging does not exceed the parameters of the output… I typically charge in “Silent” or “Standard” as the “charging mode” and the “Working mode” set as “Standard UPS”.
@BLUETTI so I got it to work from AC240 to charge AC200L. But it is the similar story you have seen on this forum, reddit etc… The AC200L does not like it when AC output is on (with or without charge). So it works, as long as I do not have AC turned on, on the AC200L. Sidenote, same applies when connecting to actual grid…
Before you say my grid is unstable or similar, the AC240 AC output is supposed to be very stable (right?), so that is not it. It’s the AC200L being confused when the AC is on.
For illustration purposes I have added a video about this happening. Hope a software patch could solve this issue.
Hi @ElDude, Yes, you can use the D40 charger from the AC200L to charge the AC240. However, we recommend using the AC charging method for better efficiency.
When charging the AC200L using the AC output from the AC240, you might encounter some instability. To address this, try reducing the maximum AC input current on the AC200L or enabling the Grid Self-adaptation mode. This should help improve the situation.
Thanks, I did change the topic from D40 to AC charging. I did adjust the Amps to lower on both Ac200L and AC240 just in case and it did work and always have grid adaption on. However you saw the video, I do not think that was the original idea of how it would work. Also note, that the AC output on the AC240 was also extremely stable and should not have been an issue. Food for thought.
Hi @ElDude, We consider this to be a normal situation.
When an inverter charges another inverter, it can generate significant high-frequency circulating currents. The output end of the inverter being charged may experience an impact and trigger protection mechanisms, hence the need to reduce the maximum AC input current of the AC200L being charged.
As for why switching to the AC200L allows charging the AC240, it may be due to differences in the manufacturing processes of different machines.