Mean Well RSP-500-15 Switching Power Supply
IT just arrived. Initial impressions: Much heavier than the cheapowatt 1/2" wider, 1/2 inch longer and almost 1/2 inch less High than cheapowatt. The casing is about 50 to 75% thicker aluminum t...
Forum Discussion
When new this battery could accept higher amps than it can now at about 375 deep cycles and a couple hundred more shallower cycles, and a few thousand engine starts.
Northstar specs a 2.6m OHM resistance on this group27.
Lifeline lists their 27T at 3.54m OHM
...............their 31T at 3.62
............... their 31XT at 3.01
.................their 30HT at 2.56 mOHM
Source:
http://lifelineb.wpengine.com/wp-content/uploads/2015/12/Internal_Resistance_and_Short_Circut_Current_of_Lifeline_Batteries.pdf
You have a Lifeline 31T right?
Still impressed with its ability to hold voltage during discharge. with 45AH removed from its new rating of 90, it quickly bounces to above 12.2v with most (not all) loads removed.
And Northstar says 12.11v rested is 50%.
I think I'd still choose the Northstar over a Lifeline at this point as I do use it to start my engine and the CCA rating of the Northstar is 200+ higher although I believe the lifeline could easily out cycle it in the long run.
I put the temp sensor on plastic case in the center of center cell, as that is where Rolls Surrette recommended placing it. I fear the sensor on the battery terminal would throw off readings due to possible resistance on the electrical connection. I will at some point be adding a second sensor whose leads can reach my dashboard for display when driving.
Battery now at 91F and accepting 6.8 amps at 14.6v. Lowering voltage now.
A 20 degree rise since applying 40 initial amps. I knew battery temp would rise during hi amp charging, but I did not expect this much. I wonder how much the screwy 31 was heating up in absorption at 14.9 and 15.3 v finish that the hydrometer dictated it needed.
Northstar specs a 2.6m OHM resistance on this group27.
Lifeline lists their 27T at 3.54m OHM
...............their 31T at 3.62
............... their 31XT at 3.01
.................their 30HT at 2.56 mOHM
Source:
http://lifelineb.wpengine.com/wp-content/uploads/2015/12/Internal_Resistance_and_Short_Circut_Current_of_Lifeline_Batteries.pdf
You have a Lifeline 31T right?
Still impressed with its ability to hold voltage during discharge. with 45AH removed from its new rating of 90, it quickly bounces to above 12.2v with most (not all) loads removed.
And Northstar says 12.11v rested is 50%.
I think I'd still choose the Northstar over a Lifeline at this point as I do use it to start my engine and the CCA rating of the Northstar is 200+ higher although I believe the lifeline could easily out cycle it in the long run.
I put the temp sensor on plastic case in the center of center cell, as that is where Rolls Surrette recommended placing it. I fear the sensor on the battery terminal would throw off readings due to possible resistance on the electrical connection. I will at some point be adding a second sensor whose leads can reach my dashboard for display when driving.
Battery now at 91F and accepting 6.8 amps at 14.6v. Lowering voltage now.
A 20 degree rise since applying 40 initial amps. I knew battery temp would rise during hi amp charging, but I did not expect this much. I wonder how much the screwy 31 was heating up in absorption at 14.9 and 15.3 v finish that the hydrometer dictated it needed.
