Can Victron Energy be used in the way I Describe below?
I want to take 35 KW's of power from the roof, pass this to a number of parallel Victron MPPT charge controllers. From here the energy will go in to a lithium battery. From the lithium battery there will be a parallel connection on to a grid connected inverter. The grid connected inverter will assess the loads in the property and use the energy storage and the available solar simultaneously to power the loads. It's very important that the inverter can be controlled as a function of measured demand rather than export. I'll say that again - It must work off demand not export.
I see people are having issues with battery charging in the UK with SMA and Victron where grid export is limited by throttling or limited to zero. The reason is twofold. Firstly, these energy storage systems work as a function of exported energy. Secondly, a 1-second compliance limit is enforced by the national grid. Generators must be able to switch off or throttle down power output before export capacity is exceeded. Within 1 second. The problem is, inverters are throttled down or turned off before the energy storage system had a chance to act as a load and open the switch. Thus, batteries are not receiving the full charge.
Inverters are throttled or turned off to stop export. But the export is the message which tells the battery inverter to turn on and charge. Because the inverters are throttled or turned off before the energy storage charger turns on, the system deems there to be no export available. The reality is, lots of surplus power has been turned off.
What would you suggest is the best solution for a grid connected system utilizing export management and energy storage? Can your solution act as above?
If we use a grid connected inverter, is there a way we can tell the inverter to ramp up and down to meet property demand?
