solar storage uk

[carltovey]

I would like to add either a retrofit inverter and batteries that monitors grid usage and then charges batteries when house load is fulfilled then discharge back to house loads when solar is down, I do not have tariff to charge battery from grid ,I need a grid tie system I have a 3kw at rear of garden on shed and 3 other small systems about 1.5kw each

Or i could change my 3kw growatt grid tie inverter at bottom of garden to one that is grid tied and will charge batteries.
Can anyone recommend a system, as there are that many inverters and batteries out there that a recommendation from someone that has already got a working system, Must be able to set inverter to not charge batteries from grid.