Cellphone Tower power supply in a container by Sun-In-One

The battery on the right in the picture above is a 48 volt bank of custom made lithium batteries with a capacity of 8000 amp hours.  It is mounted in a shipping container along with a backup diesel generator. This is being used at a Verizon cellphone tower in Oklahoma and the system was designed and built by PKYS customer SUN IN ONE of Wilmington DE.  The battery feeds a 15 kVA Quattro which is used to provide power to the cellphone transmitter tower.  The backup diesel generator is 12 kVA.

The batteries are charged from a 44 kW solar array feeding multiple banks of MPPT RS 450/100 TR solar charge controllers which you can see on the left in the photo below:

The batteries are arranged in multiple banks and each bank has its own Lynx Smart Shunt to keep track of state of charge.  The whole system is linked to a Cerbo GX so it can be monitored remotely on the Victron VRM.  Getting a cell signal for the data connection shouldn't be a problem for this project!   When this system is fully up and running we hope to get a snapshot from the VRM page showing it in action.  In the meantime here is one more photo below.