impi62

Hi. Hope someone can shed some light on this. I bought a new MKS 2 5kw inverter because it has a "blend" function, or rather a "chop between sources" function. Basically what I want to do is this: If my PV array provides 1kw and load is 3kw, the inverter must take the 1kw of PV and the shortfall of 2kw must be taken from grid. I can get this to work if I disconnect the batteries and run just from PV and Grid. If I connect a clamp meter to the incoming wire of the inverter I see around 8amps. The 3kw load is consuming 13-14amps so the difference must be coming form the PV. But I cannot get this to work when the batteries are connected. If the load is less than what the PV can give, the inverter runs only on PV. As soon as load exceeds what PV can give, the inverter draws from battery. When batteries reach the cutoff voltage of whatever I set it at, the inverter goes to bypass mode and supplies the 3kw from the grid. The PV then recharges the battery. As charging tapers off at near full (Flooded batteries), the charge current drops to a few amps so the full PV power is not being used. When the bat eventually is full, the cycle repeats. Load supplied from PV AND battery. Then back to bypass. So during the time that batteries are charging again most of the potential power from the PV is not being used. I'm sure it's a setting that's not right. I've tried combinations of settings SBU etc but can't get it to work like i want it to. Basically what I want is when the load exceeds what the PV can give, that the shortfall is taken from Utility only and nothing from the batteries (provided they are at 100%). It works like that without batteries connected, why can't I get it to work when batteries connected? I was led to believe the MKS 2 could do this? Anyone had experience with this? Hope someone can assist