Hi
I am about to install a mp-II 5000/48 and a Smart inverter RS 450/100.
I was wondering if a battery is needed before the system will work?
The system is grid parallel
I Will wire the 48v terminals to each other, until battery and busbar arrive.
asked
Battery needed?
No dont do it... Battery is the main reference for the system. Falls under crazy shed guy experiment and oops I voided my warranty.
There will be damage to components and unexpected behaviours.
https://community.victronenergy.com/questions/25592/multiplus-operation-with-a-battery.html
And are the two going to share the one bank? Also not a recommendation. They should each have their own banks if the are both running ac loads.
I wasent aware that they are powered from the battery source. Since it’s a grid parallel system, i thought the multiplus would be powered from grid.
Ok I will wait until my battery is ready. But they will share the same battery. The rs450/100 is only a mppt controller and not a inverter, so I don’t see why they can’t share the same battery. ?
Sorry you called it an inverter RS so had my wires crossed no pun intended- yes they can be connected to the same bus bar. And yes the battery is used for reference even in an mppt.
The MultiPlus is not a grid inverter, it is a battery inverter. A battery must be present for it to work correctly. The battery provides a stable Voltage reference for it to work. The Voltage from charger is not predictable, depending upon PV power available at any given random time.
Think about removing the battery from your vehicle and just using a charger in its place, you wouldn't expect things to go very well?
Interestingly I have one of these mppts along with. 250/60 and a 150/100
if the circuit breaker to the battery trips the 450/100 seems to continue supplying the loads in the house whereas the other 2 shut down
maybe I have a problem then ?
It was never said that it does not work only that possible damage that can occur. We are talking dc power and huge amps.
Just because nothing bad has happened so far, does not mean it is safe to do or can be recommended.
