So I understand that in an ideal world one needs to match their grid tie inverter size with multiplus size. Hence the term 1:1 rule. For example a 5000VA multiplus to a Fronius Primo 4.0 etc. But what about connecting say a 5000VA multiplus to a Fronius Primo 3.0. I can't see that the Multiplus whould be at risk of overload when loads are suddenly dropped form the Fronius. Its probably not an ideal setup as per the 1:1 rule but would just like to know if anyone is running anything similar and if there could be any issues.