Hi, apologies in advance for the all the scatter gun questions!
Hopefully someone here might be able to help me to size and choose the right equipment for a bill of materials.
I know what they say about assumptions but, let us assume that I need to operate consuming approximately 27.5kWh.
Our energy supply costs for the year are on track to come in at £30K+ per annum, at least whilst we continue to consume nearly all of this power direct from the grid. With that in mind we need to design and build an energy storage system that would help to reduce this particular operating cost significantly.
Based on my research to date I seem to be on the right track, but given the likely sum of our intended investment I would like to make sure that I am not undersizing or oversizing (or going wildly over budget!)
The intention is to scale up to generate and provide up to a 15kW input from renewable energy (wind/solar/biomass). But would this be able to provide enough charge assuming I can consistently supply the 15kW, whilst consuming 27.5kWh?
I read somewhere that there is usually a need to respect a 40/60 ratio in charge vs consumption, but if this is incorrect then someone please correct me! :) Also do Li-ion batteries allow for a much better performance in this respect?
Anyway, I am looking at the Victron Quattro 48/15000-200-100/100 15KW off-grid solar to run alongside a suitably sized battery bank (vendor/size suggestions welcome).
So, is this a wise product choice, and would we be able to run on continuous mains power via the Victron Quattro + battery bank storage for our power needs, until we have all the other RE components in place?