Forum Discussion
DSchmidt_2000
May 11, 2023Explorer
Sure enough, Trojan does recommend getting the voltage up there. Sorry for the long entry.
Starting on page 17 From this document
Graph
I have these options with my charger. Lester recommended is profile 22251, but 22250 has a lower finishing charger amperage of 4 vs 6A. Or I can use the AGM which has no finishing charge, but uses dI/dT.
Per the Trojan spec of 1-3% of C/20, 4A is better than 6A, and everything else in the charge profile is the same.
Page 1Common Lester Summit II Profiles
Thanks! I'm going to try and make this charger work as I've already bought it. There's so many profiles available, I just need to find the one that doesn't boil the batteries.
Starting on page 17 From this document
Trojan recommends a 3-phase I-V-I profile for charging its flooded batteries
o Phase 1: Constant current bulk charge
A constant current equal to 10-13% of C20 is applied as the voltage slowly increases.
The bulk phase ends when the voltage rises to the absorption voltage.
o Phase 2: Constant voltage absorption charge
A constant voltage equal to 2.35-2.45 V/cell is applied as the current slowly declines.
The absorption phase ends when the current falls to the finish current.
o Phase 3: Constant current finish charge
A constant current equal to 1-3% of C20 is applied as the voltage increases. The finish phase
ends when the battery is fully charged. Flooded batteries will gas (bubble) toward the
end of the finish phase to ensure proper mixing of electrolyte.
o Refer to Table 5 and Figure 6 for system charging parameters and typical voltage and
current profiles
Graph
I have these options with my charger. Lester recommended is profile 22251, but 22250 has a lower finishing charger amperage of 4 vs 6A. Or I can use the AGM which has no finishing charge, but uses dI/dT.
Per the Trojan spec of 1-3% of C/20, 4A is better than 6A, and everything else in the charge profile is the same.
Page 1Common Lester Summit II Profiles
time2roll wrote:
I recommend the Battery Tender brand.
Thanks! I'm going to try and make this charger work as I've already bought it. There's so many profiles available, I just need to find the one that doesn't boil the batteries.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,188 PostsLatest Activity: Jan 18, 2025