Finally connected 2 more 100W 20v PV panels (5 in total) together for a 12v battery off-grid system

 So, I wire up the last two 100W PV panels this afternoon once their was a break in the showers.

I was pleasantly surprised that the panel that blew off the 40' Shannon Tidy Towns (STT) container is still producing 20v ! Ah this is the missing 6th panel! So maybe not. I'll look in the 40' container for this :)

The goal is to customised this system to be deployed next week back on the 40' container to provide battery powered LED lighting again.

I will loan a system to STT with a LiFEPO4 12v battery so that the LTE modem has plenty of juice. Though I do have two spare 12v lead acid batteries I may try as well :)

Next is reprogram the NodeMCU based WiFi charging monitor to work with the new STT WiFi SSID and password and a MQTT database and connect up an LTE router to the 12v battery. Finally I will create a STT blogger post to provide real time graphs.

But this time round everything will be more robust and remotely monitored.

Latter in the year we expect to a more capable, professionally installed PV system. Then I will reclaim this loaner system.

Experimenting with two 24v 100Ah LiFePO4 batteries in Kilnageer

For the last few days I've been testing my two 24v 100Ah LiFePO4 batteries.

I received them a few weeks ago but only tested BLE communications to their BMS with an Android App. I didn't try charging or discharging them.

I bought them on Jan 11, 2022 from  CERRNSS Battery Factory Store (https://www.aliexpress.com/store/912104017) on AliExpress and they cost 1,311 euros including all taxes and a mains charger. I specifically asked for them to have Wi-Fi access to their BMS. They arrived on the 1st April, 2022 so took 10 or so weeks to arrive.

But after taking them up to Mayo on Mon 18th April 2022 the testing finally began.

In Mayo I have 5x 230W solar PV panels connected to a eSmart3 charge controller which was connected to 6x lead acid leisure batteries (configured as three 24v pairs in parallel).