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orjolsen avatar image
orjolsen asked

Quattro SOC and assist battery with generator when higher load


Hi,


We want to run generator to assist the batteries when higher load is needed. We have a MG Master LV BMS, Quattro inverters and CCGX. I'm new to this kind of system, and when talking on phone with MG on support earlier during some problems when commisioning, they said that I shouldnt use any assistans in the Quattros (Two-signal BMS and Generator start/stop) since all this are controlled by the CCGX, and no cabling between the BMS and Quattro (Discharg/Charge allowed).

The problem now is that when runninng on batteries and the load required is higher then the limit and asking for generator, the generator starts running, but does not assist the batteries, the generator take all the load and start charging the batteries instead, even when the SOC limit is reached, the generator keep charging the batteries over the SOC limit. I can see on the CCGX under Quattro, the state of charge has no values just (--).

Is that why the generator keeps charging the batteries even when the SOC is reached and the generator takes all the load when I want the generator to ASSIST the batteries?

MultiPlus Quattro Inverter Chargerbattery chargingBMSCCGX Color ControlSOC
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Paul B answered ·

For starters I would not use the generator autostart assistant, I would use the GX devices Autostart feature

You will need to adjust the Generator autostart parameters in the GX device to achieve what you want.

ie set the load limits and the SOC limits that you want

once the Generator starts the Quattro will shift all the load to the Generator UNLESS you adjust the Power assist setting but this setting is always fixed ie 20 amps, or what ever you set it too once this is reached from the generator the quattro would then assists by taking power from the Batteries.

Now depending on the assistants being used and the BMS this may not work, and you would have to then install a DMC Digital Multi Control to set this setting


Another way to set it is with a MK2 unit and VE configure as well and directly program the quattros settings

Also make sure the Battery monitor is set and turned on in the Quattro thats unless you have a BMV-712 unit


Hope this is of some help



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orjolsen avatar image orjolsen commented ·

Hi,

Thanks for the response.

All Generator autostart parameters are adjusted in the CCGX and not as an assistanse on the VEConfig. I have no assistanse in the config, since I was told to not have any by the MG support.

I will need to enable battery monitor in the VEConfig, thats for sure.


But another question of topic. We want that the generator should be able to run at 100% capacity if the load require so. So i set the AC1 input current limit according to the capacity of the generator. But when there are less load, lets say 60%, we want to charge the battery, but we dont want to charge with all the remaining power from generator and run it at 100% but, lets say 80%, Is this possible? Or will we need a PLC?


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