I have a marine set up, with solar, and a 3kw MP.
I have tried searching both the community and the interwebs with no success.
My goal, to use solar and inverter as much as possible, with grid only kicking in once batteries are down to a certain discharge. I have alternative energy priority set to on, but that doesn’t give the batteries much room to work before kicking back into charge mode.
How can I truly prioritize solar/battery over shore power?
The best way is conditional AC connect - treat the grid like a generator.
Hi
For my home I was having the same wish. I ended up by using node red to control my MP2 and putting it in « inverter only » mode when I want to remain fully off grid, switching back to ON mode only when needing grid.
There is really nothing that beats ESS. Why do you need something else? The best thing is peak shaving below min SOC. If the inverter goes into pass thru without peak shaving below the min SOC you are relying on the shore for all the power. With peak shaving you can service loads higher and the multi will pick up the slack. Power assist is very problematic and not as smart.
ESS feeds power into a energy supply, which usually comes with strict regulations wherever you are and such power generators should be fixed installations etc. which very much rules it out being marine. Also, you may find especially smaller units don’t have the e.g. dual relays for safety etc. which is required now for type tested certification. I’d advise against it. AC ignore works great when the system is sized correctly and only occasional grid connections are required.
If you put everything on the critical loads, it won’t export anything with export disabled. If you try and do something with AC in sending power to offset loads, then you will have a problem. There are so many settings like inverter power and min SOC with peak shaving. I am pretty sure I could do some things in Node-RED to make it function similar, but when installed, they are just there for you to use.
I can’t do that, because I have an AC on the inverter side that will run inverted, if it will start without overloading the inverter.
Long term, it will get moved to output 2, but I can make that move at the moment.