Hi, I'm setting up a hybrid on/off grid system.
I aim to couple a zeversolar zeverlution5000[common in Australia] to the output of 2 parallel multiplus 2's. I'm hoping that via frequency shifting the multi's will be able to limit it's output when the batteries are full. There is a section in the settings where you can set a max frequency on the ZS so i'm confident it will be fine.
What is hybrid on/off grid you ask. We will stay on grid during the six warmer months of the year, where our feed in tariff will pay our fees plus put money in our pockets. But in the 6 colder months, our feed in will not cover the $200 connection cost. So we'll switch the AC input over to a generator and disconnect in the winter. Kind of the opposite of what you would expect, but our huge 6KW system made plenty extra last year in the winter and our 4days of battery should mean barely using the generator if at all.
My questions are these;
1, Can anyone confirm that the zever solar will work with the multi's?
2, Can I change the input from grid to generator in the menu without connecting laptop?
2a, If not, could I just change grid to zero feed in and start the generator manually to charge the batteries?
3, why bother with frequency shifting If the AC inverter will naturally lower it's output once the voltage gets to 253ish. Couldn't the multi just let the voltage float up that high?
4, does it matter if the AC invter on the output is set to leading or lagging?
5, since this config usually doesn't need the multiplus II external current sensor, could it instead be used to monitor the AC PV output? Then you would have more info on your loads. If not, this should be a feature request.
Thanks in advance, The reason i'm asking is because if ordered and payed for the multi's, but they want to configure them before shipping them out. Want to be sure they are 100% right.