Given that the chargery DCC does not do soft start when commanded off and back on, I'm seeking ideas to make sure it stays off if it is shut down for low voltage on the discharge mode. I've got a HUGE battery and if it goes dead, I got bigger problems.... I don't mind if the inverters stay off.... heck they are sunny islands and if they power down, they will not auto start unless the user holds the "start" button down... so there is no need to have the DCC surge and charge those huge caps when the inverters won't autostart anyway.....
So, I've thought of using a SSR for 12v inline with the DCC control cables... using the SSR as a latching relay and the user has to press a button to make the relay latch on.
So start up sequence would look like this...
1 make sure the DCC is OFF
2 power up the BMS and wait for it to assert the DCC interface pins.
3 press my "latch start" button on the latching relay
4 flip the manual power switch on the DCC.
Anyone else got any ideas?
So, I've thought of using a SSR for 12v inline with the DCC control cables... using the SSR as a latching relay and the user has to press a button to make the relay latch on.
So start up sequence would look like this...
1 make sure the DCC is OFF
2 power up the BMS and wait for it to assert the DCC interface pins.
3 press my "latch start" button on the latching relay
4 flip the manual power switch on the DCC.
Anyone else got any ideas?