OK, I think I've realised what it is you were explaining above on how you have connected the two power meters that are connected to each inverter. Would I be incorrect in saying that one of your power meters is on the power line leading to your load (house) "downstream" so to speak of the first power meter?
Van-traveler86, are you 86 or were you born in '86? &
Yes, there are loads between the 2 meters. I expect you could probably get things to work with both meters at the same point, by having the ramp rates on the 2 inverters significantly different. But it might take a lot of patience. Unfortunately the inverters only give the ability to set the ramp rate (gain), if there was a integral or lag setting or anything like the typical settings for a PID it would be simple- they must be there they just don’t make them accessible to customer- probably wise, not many people would understand it and could cause lots of harm.
And, the reason I did it that way is so I can power whole house when off grid, break it into 2 separate systems and the 5kW off grid output from each inverter is plenty for each segment.
born in 86 XD, but is how you feel not your age!! that is so cool that you are trying to diy your solar system batteries i have an idea for your system issue i dont know if its the best way to solve it or if will work but i think it will, you can have 2 diferent load panels and put one inverter in one panel and the other inverter in the other panel and you can put a meter in each line going to the panel not in the main line and like that you will have the correct reading in each meter like majic said separate the house into 2 systems.Van-traveler86, are you 86 or were you born in '86? &
As requested, here is one-line drawing of system. Its complex but my 17 year old understands it.
You would need to figure out how to communicate between the inverter and battery. I intend to at some point to try to reverse engineer the communication between my min-tl-xh-us inverters and batteries but I have not gotten time to put any serious effort into it. I currently have two 11.4kW inverters and 9.9x6=59.4kW-hr of ARO batteries- if I add more battery it will be a cheaper non-Growatt option just for the challenge. I’ve been running off grid with one grid tied to the other.
Did you get anywhere on this project to get the batteries talking to each other?
Hi, MajicDiver! Your lessons are very interesting.
I don’t see how it could break anything trying, wire it up with a breaker between them and a clamp on amp meter so you can see what happens. Note that I was talking about the MIN-TL-XH-US inverter, the one in your drawing is the European version. I’ll probably try it this fall when it is nice mild temperature and put a 16 amp breaker between them. What ever the result is would be useful learning.
Do you think I can connect two MIN-TL-XH inverters to one battery?
With the -US version I expect it would work, but you would be relying on the battery BMS to prevent discharge rate being too high. The reason I believe it would work is I inadvertently wired an ARO battery to one inverter and plugged the communication cable of another inverter into the battery- the battery woke up and provided discharge, and the inverter it was wired to used it.
I'm also very interested in this idea. I just can't spend thousands of dollars hoping it will work lol.
There are a lot of people on this forum (including the owner) who make income on 48 vdc battery equipment in various ways. It would be nice to see one of them realize they could sell a device that would sit between a set of “generic” 48 volt DC battery and several of the more popular inverters with high voltage batteries.
What transformer?
signaturesolar.com
