Posted by Peter Kennedy on 10/27/2022 to News
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.