LiFePO4 ESS - Crimping again - 35mm2 cables

Let's crimp again !  :-)

This sunday, I cut & crimped 35mm2 cables to replace the small doubled ones that could not hold high current too long ...

Now this is much better 

35mm2 copper cable into 35mm2 / 8mm lug

screwed onto the GTI side Tyco Kilovac contactor

and onto the postivie battery pack terminal

First link from the battery pack to the contactor : Done

Since I could not find any red 35mm2 cable, I just put some red tape on both ends to mark it "RED"

Here, all the cables have been replaced by 35mm2 ones; 2 mores: 

- From battery pack negative terminal to the GTI stack negative terminal

- From GTI side Tyco Kilovac contactor to the GTI stack positive terminal

Now I can put the GTI stcak and the chargers at a 1.5m distance from the battery pack and ESS Control Board / EMS - Energy Management System - ; I am planning on putting all these just outside the window to be able to charge at night - low rate - and sleep normaly - all this is in my bedroom :-) - 

GTI side Tyoc Kilovac contactor

GTI stack

Battery pack terminals

LiFePO4 ESS Battery pack

LiFePO4 ESS - User settings can be modified and saved in the EEPROM

Users can now change Variables in my DIY ESS program and save them in the EEPROM for the next runs; This is a major enhancement and I think it will be usefull

If necessary, the users will be able to plug their Mac or PC to the Arduino board via a regular USB cable and see the log displayed by the program

If some of the frequency, sensitivity, thresholds need to be adjusted, it can be done using a simple code letter and value:

i.e.: 'd100' + Enter will change the delay between two readings from the original 50ms to 100ms, and if this is happens to be a good value for the behaviour of his ESS, the user can save it typing 'save' + Enter

The modified value(s) will then be located in the Arduino's EEPROM (Read Only Memory) and will reside there even if the power is switched Off, for the next runs

At start up, the ESS arduino board program will read values stored in the EEPROM and use them 

Typing 'config' + Enter, the program will display all the variables stored in the EEPROM

DIY ESS - Still testing & Evening Usage Covered

This is the Energy graph from last night using my DIY ESS in automatic mode: I am covering almost all the energy used during the evening and shut off the system when I went to sleep with still half in the LiFePO4 battery bank

Wattson Anywhere Energy Graph

Wattson Anywhere Energy Analysis Pie Chart