Lithium Battery Question
I am thinking about converting my 2020 lance to Lithium batteries. I want to do it as inexpensively as possible. (Battle Born ain't gonna happen) Can anyone tell me what specifications I should look f...
Forum Discussion
The first part is to get the approx. SOC where the voltage starts to spike at the high end. You use the 20hr rate to get the proper AH to go with the 200AH rating. So from full (as defined by you best you can) and AH counter at zero run it down at 10 amps until voltage flattens on your graph.
This will be your while camping, battery cycling, high end for when to stop the gen while recharging. (only do full on shore power) Your "marker" . So on your graph pick where it flattens and how many AH that was down from full. Say it was 15AH (I have no clue what it would actually be) That means your high is about 93% SOC for operating range. Assuming here you will operate along the flat voltage part.
Ignore the SOC the monitor invents, just use the AH counter and calculate your SOC yourself using 10% = 20AH.
You can make the math easy by picking an easy number to be the high end.
You need your own graph /table to keep handy to remember the numbers. So if 93% SOC is your high end for the count, when it gets to 35AH down, you are at 83% SOC.
You need a low end marker for when to plan to recharge before it gets there. With Wets you use the voltage at 12.1 =50%, but you don't have a voltage -it's flat--so you pick your low AH for say 30% SOC (140 down) . You use your expected daily AH usage, say 50AH, and to avoid going below 140 recharge tomorrow when it is 90 down today
Your low marker will be at some higher SOC than your BMS low voltage cut off voltage is at for SOC. So somewhere at the low end of the flat voltage just before the voltage drops off. I don't know if that matches the high end spike start for number of AH. You have to watch for that and mark your graph where you are comfortable I guess. You want as wide a range of SOC to operate in as possible and still be safe from any risk of going too low.
This will be your while camping, battery cycling, high end for when to stop the gen while recharging. (only do full on shore power) Your "marker" . So on your graph pick where it flattens and how many AH that was down from full. Say it was 15AH (I have no clue what it would actually be) That means your high is about 93% SOC for operating range. Assuming here you will operate along the flat voltage part.
Ignore the SOC the monitor invents, just use the AH counter and calculate your SOC yourself using 10% = 20AH.
You can make the math easy by picking an easy number to be the high end.
You need your own graph /table to keep handy to remember the numbers. So if 93% SOC is your high end for the count, when it gets to 35AH down, you are at 83% SOC.
You need a low end marker for when to plan to recharge before it gets there. With Wets you use the voltage at 12.1 =50%, but you don't have a voltage -it's flat--so you pick your low AH for say 30% SOC (140 down) . You use your expected daily AH usage, say 50AH, and to avoid going below 140 recharge tomorrow when it is 90 down today
Your low marker will be at some higher SOC than your BMS low voltage cut off voltage is at for SOC. So somewhere at the low end of the flat voltage just before the voltage drops off. I don't know if that matches the high end spike start for number of AH. You have to watch for that and mark your graph where you are comfortable I guess. You want as wide a range of SOC to operate in as possible and still be safe from any risk of going too low.
