battery storage

[Carl tovey]

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.

 

[DIYrich]

How about a Growatt 3kw Off-Grid inverter?

Growatt 3kW Stackable Off-Grid Inverter | SPF 3000TL LVM-48P

Signature Solar provides solar panels, off-grid solar systems, grid-tie, and hybrid systems. Quality solar inverters, bifacial solar panels, complete solar kits, solar batteries. Featuring brands such as EG4 Electronics with their solar battery, LifePower4 and EG4 LLifePower4 and EG4 LL

signaturesolar.com

 

[garetwo]

How about a Growatt 3kw Off-Grid inverter?

Growatt 3kW Stackable Off-Grid Inverter | SPF 3000TL LVM-48P

Signature Solar provides solar panels, off-grid solar systems, grid-tie, and hybrid systems. Quality solar inverters, bifacial solar panels, complete solar kits, solar batteries. Featuring brands such as EG4 Electronics with their solar battery, LifePower4 and EG4 LLifePower4 and EG4 LL

signaturesolar.com

Would that be able to do what he asked for, "monitors grid usage" or ties to the grid?

 

[DIYrich]

Would that be able to do what he asked for, "monitors grid usage" or ties to the grid?

It has AC Input (grid).
It will take PV and use it for load and battery (monitors usage)
If load is too much, it will switch to grid (monitors usage)
It won't export to grid - OP did not ask for that.