PD 9260 how long to charge?
I've heard that people with the PD9260 (or similar) use the pendant to force the charger to stay in boost mode (14.4V) while running their genny. To get Max charge with min gen time. Ok, but how do...
Forum Discussion
The above method will tell you the usual time to get your own bank to 14.4 with your own converter. But what SOC do you think you are at when you first reach 14.4?
As you see in the ugly graph above, the SOC you are at then, depends on your charging rate. (charging amps/AH capacity of bank)
If you use a higher charging rate you get to 14.4 sooner at a lower SOC so you must keep charging while amps are tapering to reach your desired SOC. (this is still faster than using a lower charging rate and getting to 14.4 at a higher SOC as you can see in the ugly graph above)
BTW, the PD bumph states it gets to 90% SOC in Bulk. As you can see, this would only be true if you used a very low charging rate such as 10%. You want a high charging rate when on generator time, such as 25 -30% (higher than that gets you into the vertical part at the left and diminishing returns for time, so 30% charging rate is about it really.)
So if you have two batts, you can get good value from a 70 amper and if you have four batts then you could use a 140amper. Of course more amps means you need a big enough wattage (VA really) generator to run the charger(s)
You can see that with two batts and a 60 amper you will not save much time going to a 70 amper for doing a 50-90. However if you had four batts, your 70 amper is going to be very slow. Generator time is all about charging rates.
As you see in the ugly graph above, the SOC you are at then, depends on your charging rate. (charging amps/AH capacity of bank)
If you use a higher charging rate you get to 14.4 sooner at a lower SOC so you must keep charging while amps are tapering to reach your desired SOC. (this is still faster than using a lower charging rate and getting to 14.4 at a higher SOC as you can see in the ugly graph above)
BTW, the PD bumph states it gets to 90% SOC in Bulk. As you can see, this would only be true if you used a very low charging rate such as 10%. You want a high charging rate when on generator time, such as 25 -30% (higher than that gets you into the vertical part at the left and diminishing returns for time, so 30% charging rate is about it really.)
So if you have two batts, you can get good value from a 70 amper and if you have four batts then you could use a 140amper. Of course more amps means you need a big enough wattage (VA really) generator to run the charger(s)
You can see that with two batts and a 60 amper you will not save much time going to a 70 amper for doing a 50-90. However if you had four batts, your 70 amper is going to be very slow. Generator time is all about charging rates.
