I’ll draft a system overview up and send it over the weekend 
Thanks again Tony!
If you have a preferred tool/webapp/piece of software I can put the topology on that.
Thanks!
I believe that you have an Easysolar. Is this connected to batteries? ← Yes.
You also have 3 x Huaweii inverters connected to batteries. Are they also connected to Grid? ← Yes.
That’s an interesting setup. I am guessing a main dwelling for the CU(1) where the tails come in and then an out building for CU2, connected to the Huawei Inverters.
Your Huawei units are balancing the PV input and load using the RS485 monitoring the main input on the Tails.
You now have a wind turbine to add to the mix.
Priorities are:
- Generation from wind turbine and PV panels to cover loads.
- Excess energy from PV / wind turbine to storage.
- Batteries to supply balance of load in case of no/low PV/wind
- Battery topped up from mains if storage getting below selected state of charge (SOC)
The challenge is to stop both battery systems fighting each other using your DDSU666T and another device.
I don’t have an instant answer but it is an interesting challenge.
@johnyma22 I haven’t forgotten about your issue I am just not clear on what the way forward is. It might be worth updating the short table above to describe accurately what you would like your system to do and the issues that you are aware of. Others may then be able to chip in with suggestions.
It’s all good buddy,
I’m waiting on the RS485 <> USB and some additional tails for the CT anyway. They should land tomorrow.
I will go through and update your ordered list tho
- Generation from wind turbine and PV panels to cover loads.
- Excess energy from PV / wind turbine to storage. Solar (45kwh storage), Wind (2.5kwh storage)
- Batteries to supply balance of load in case of no/low PV/wind
- PV & Wind Battery topped up from mains when energy is cheap (midnight to 5am).
- Wind Turbine(Victron) to cover ~500W load as often as possible, this should be priority over discharging Solar batteries…
I was able to accomplish the above before by using a sine wave inverter and just having that constantly feed 500W out (when the batteries had enough stored). Any demand above 500W was picked up by the Solar Inverters (Huawei).
Issues:
- I am not aware of an ability to say the Victron unit “always put out 500W irrespective of grid loads”.
- Islanding is managed by a system that keeps the circuit closed if the grid is present and opens the Victron AC circuit when the Grid is not present. I don’t have to keep this if Victron has a more elegant method.
- I can compromise and say that the Victron unit handles some directly connected AC loads on AC Output 1(Think out building heaters, lighting etc) and then only if Grid consumption is outside of the cheap energy hours it helps support the grid should the Solar PV batteries be unable to provide enough energy for the property. What I don’t want to do is have the Victron unit provide energy to the house(from the batteries) during cheap energy hours because it spots grid consumption as the batteries are charging.
@johnyma22 Now that you have a clearer definition of what you are looking for assistance with it would probably be beneficial to submit a fresh post for support.
Probably best to await delivery of your new equipment and run some initial tests first. I suspect that you will see your two systems fighting with each other, it will be interesting to see the outcome.
Good luck.
Done and done
@johnyma22 I hope that you get a good response. I note that in your second item “How should I configure…” you have repeated a couple of paragraphs in the post. You might wish to consider deleting the repeats. Cheers.
Fixed, Ta