MrSqu

Thanks very much for this. I’m having very unsatisfactory interactions with Deye Italy, so will give the China support a try. I’ll let you know how I get on.

Thanks JayMarden. Sounds to me like your firmware does exactly what I am expecting my inverters to do. Mine isn’t, and doesn’t correspond to the info in the manual. Maybe I could get hold of the firmware that you are using! I’m in Italy, and totally off grid, so there shouldn’t be any problems… what do you think? Is there a site where we can download different firmware versions? It’s specifically the 8kw Single phase 48volt ones that I’m having issues with - the 12k 3ph behaves as the manual suggests… interesting one🤔

Hi, quick update for anyone with similar Deye challenges:- No matter what you do in the software, you cannot have the grid just charge your batteries. The inverters will draw power from the grid that is enough to power your services _and_ charge the batteries. No peak shaving, no generator max power, no battery voltage charge values will enable any other process. The inverters will demand the entire power requirement from the grid. Also, another ‘gem’ is that when you charge the batteries from the grid, the solar charging feed is interrupted, and only the grid does the charging. This _must_ be a software bug, as also the ‘grid charge’ function not working must be… any thoughts?

I’ve already checked this. It is the grid current (and gen current for the gen charge). It’s not the current at the battery. I am charging at 5kw. I’ve already mentioned that I put the grid shaving on at 5kw, and it still draws too much current.

Thanks for your reply. I think the problem is the power setting in the System Work Mode. I do want the batteries on the 8ks to be as full as possible, so I keep the batt column at 56v to enable this. My ideal would be to do this in the daytime, when both solar setups are generating from the panels - that way, I can plough more power into the 8k batteries. I can’t raise the charge current - this is what is triggering the smart breaker between the 2 systems. 22A in Uk equates to 5kw, which is my desired transfer rate, and just below the max 6kw of the 12k inverter. I’ll try the power setting change as suggested by Jay, and let you all know. Thanks everyone for such great support. adam.

Thanks for this. There is no problem with this inverter (12 3ph) as I do not have a grid input to it, and it’s standalone. I only use the panels to charge the batteries, and they are charging fine. The problem is with the time of use charging on the other 3 8k inverters.

I assure you that I am using battery. I use around 36kw of battery per day. What I think is happening (thanks to Jay for this) is that I use the solar and batteries all day. What I want to do is just top my batteries up a bit with the “grid” (other inverter/panel/battery system). jay suggested that I raise the power settings in the system work mode - for example from 2kw to 10kw so that the system might not draw too much power from the “grid). I’m just trying not to let any spare power capacity is lost from the solar system’s.

Here are the 3x 8k settings:-

Those are the 12k 3ph settings

I’m away for 3 days, but will do as soon as I get back. Cheers.

Thanks Jay. I was under the impression that the grid could be used just for charging, with the main power drain being taken by the batteries - kind of 4 or 6kw offset against the load. good call about raising the power values in the time of use columns… no idea what might happen, but the worst case would be that it still trips. I have to be in zero sell to grid mode so I don’t feed power up the output of the 12k inverter… will let you know what happens…

Also, time of use settings do actually work for charging as well - that’s how I’m topping up the batteries overnight…

Hi Greenfields, thanks for the super rapid response. Yes, the 8ks see and accept one of the phases as grid. I’ve set the charge rate as 17A. It charges at 17A if there is a load lower than 17A total across the 8k inverters. But if the air con is on in the main house, the system does demand around 80A, and the intelligent breaker trips immediately. I’ve obviously tried the gen input as well - same happens, even with gen peak shaving on too. there are currently no other loads on the 3ph inverter when I do the tests. anyone else find this anomaly?

Hi, I have 3 Deye 8k inverters linked in mono phase with 16kw of panels and 50kw of lifepo4 batteries. When I am drawing 18kw from the setup, and I try to charge from the grid at 4kw, the inverters seem to demand the full 18kw from the grid initially, and trip the intelligent breaker (set at 6kw). My “grid” is actually another off grid Deye 12kw 3 phase setup with 10kw of panels and 50kw of batteries on the other side of my little complex, and I use 1 phase to top up the main setup. Currently, I can only top up overnight when heating/air con is off, or the system trips. Any ideas why my 8k Deyes are doing this? Is it a “feature” or a plain old fault of the firmware/software? I have grid peak shaving on, and have tried everything I can think of. The Deye also seems to not use the power figures input into the “time of day” charge page under the “System Work Mode” category, but favours the settings input in the “grid charge” page under the “battery Setting” category. Any ideas or knowledge on this would be really welcome. Sorry, really long preamble! Thanks, Adam (MrSqu). Sent from my iPhone