[RE-wrenches] Lithium battery recommendation

[Jay]

Hi all

I’m
Looking for recommendations for a lithium battery. 48v.  150-200 kWh. 
System is probably going to be open comm, as the system has outback equipment. That could change but probably not. 
Remote monitoring is required even though it is a site with people 24/7. 

So far fortress and home grid. Have been recommended to look at. 
Blue planet is just too expensive. 

And PS. Fortress says that you cannot add batteries after 1 year. This goes against everything I thought I understood about lithium. 
Any comments about why they say that? 
Do others say rhat?

Thanks in advance 

Jay