Request: instructions for placing 4 good batteries (see attached OEM and modified battery diagrams and specific questions below) in one string and disconnecting the bad ones. I understand the downside according to this forum is that the 4good batteries will be stressed and fail sooner since the OEM battery setup offers 450Ah @48V load distrubuted amonst 8 batteries (maximum 30HP/22300 Watts).
Please understand that I have limited knowledge and experience in this area. The some notions and values given here were taken from this Forum expecting they may help others looking for information.
History: Delta Q would not charge the entire pack, so used an external 12V charger at 10 amps on the suspect batteries for about 4 hours until the Schumacher charger timed out, unable to complete the charge. Three batteries have dead cells and will not take a charge much above 10VDC. All 8 are the original US 12VXC flooded batteries. While they are not optimal, they performed OK for my limited use. I believe what happened was while away for the winter is that the Delta-q (Algorithm # 11) re-started multiple times due to power outages thereby boiling some of the cells dry. Upon return the Q would not begin to charge. The batteries took 4.5 gallons of distilled HOH to fill. After individually charging the three batteries, resting they read: 10.10, 10.42, 10.85 VDC. Some cells (one or two per battery) in the suspect batteries were not bubbling while charging. I did not use the remote charger on the good ones, only the Delta Q cycle, which did not complete to maintenance level. They read: 12.49, 12.64, 12.76, 13.25, 13.32. After looking at all posts related to Delta Q and flooded batteries I understand the limitations of running with one bank, but am not ready to replace the 8 batteries or convert to Li just yet.
The fuse holder under the contactor, the MPC, and Delta-q charger connections are all sound with nothing burnt.
Given that the attached Polaris OEM and the Modified 4 Battery diagrams are accurate for battery placement, connections, and numbering, they can serve to better understand your responses some questions about using 1 bank.
![OEM Diagram]( "OEM Diagram")
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![Image]()
Please help with the following while keeping in mind I'm not well versed in this. Hence, the diagrams as a reference if you please.
1) Confirm that the best placement for one bank is on the Left side. R side would be better for me but perhaps some of the cables won't reach as well or some other limitation)s).
2) Confirm the cable (+, =) connections for those 4 good batteries are correct as seen in the Modified diagram and that the +, = cables going to the Controller are correct from #4 battery to the Contactor
3) Can the unused pink SOC wire from the R bank (+ at #8 battery) be connected to a battery on the L bank? If so, which one? ...and leave the existing pink one as is (+ at #3 battery). This is to have some functionality of the SOC gauge, i.e. hours used if possible.
4) Since the Aux gauge connections on the R side are no longer needed, do the existing connections on the L bank for Aux gauge (#3 neg and #4 pos) on the L bank remain as is or better elsewhere? Also, would the Aux gauge still read 48V from the one bank(50.92 V = 100%) as it did for 2 banks (same 48V) but with less capacity and expected faster discharge)?
5) Current Delta Q algorithm is 11 . I got that from a members post some years ago. Likely that should be changed since it has boiled some of the batteries in the past. Delta-q website (https://support.delta-q.com/hc/en-u.../hc/en-us/articles/360015623471-US-Battery-Corp-Batteries-Algorithm-suggestions) does not show it as an option for my batteries. Perhaps it should have been 71 all along (145 Capacity @20 Hour Rate). As stated, algorithm 11 does not show for US 12VXC. It shows 200 & 210 Capacity @20 Hour Rate for the only two other 12V batteries. BTW: is Capacity @20 Hour Rate the same as Ah?
What is a better algorithm and why? I read on this Forum that 71 (generic 140-200 , 155Ah for a 1x4 pack) is best. Please conform or offer alternative.
6) Is there any use in attempting to charge the suspect batteries again with the external charger? I only did it one time but the charger was unable to complete the full charge cycle as happened with the Delta-q. I did not disconnect any cables between the batteries to manually charge them. I did use the Delta-q again. I runs through its sequence until it stops at II, then reverts to fault mode blinking red. After a 4 hr rest the respctive voltages of batteries 1 through 8 were essentially the same at: Bank1, 12.58, 9.58, 12.78, 12.91 and Bank2, 13.13, 12.92, 10.87, 10.84
Question: are using batteries #1 (12.58V), #3 (12.78), #4 (12.91), #5 (13.13) viable for using in 1 pack, while keeping #6 (12.92) as a reserve, and discarding #2 (9.58), #7 (10.87), #8 (10.84)
7. Leave the nonfunctional batteries in place on the EV means a weight penalty (450 lbs) but I'd find it difficult to store them elsewhere. How critical is that reasoning since I use the EV very little in the mountains of NC (paved to reach some trails now and then).
8. Was there any significant consequence in not removing any cabling when the individual batteries were charged with the external charger? I read in the forum to "disconnect one cable in one of the two strings that fully breaks the circuit and will stop any flow between the two sides of the pack."
9. Anything else to consider? Thanks for taking the time to have a look and share your knowledge.
Please understand that I have limited knowledge and experience in this area. The some notions and values given here were taken from this Forum expecting they may help others looking for information.
History: Delta Q would not charge the entire pack, so used an external 12V charger at 10 amps on the suspect batteries for about 4 hours until the Schumacher charger timed out, unable to complete the charge. Three batteries have dead cells and will not take a charge much above 10VDC. All 8 are the original US 12VXC flooded batteries. While they are not optimal, they performed OK for my limited use. I believe what happened was while away for the winter is that the Delta-q (Algorithm # 11) re-started multiple times due to power outages thereby boiling some of the cells dry. Upon return the Q would not begin to charge. The batteries took 4.5 gallons of distilled HOH to fill. After individually charging the three batteries, resting they read: 10.10, 10.42, 10.85 VDC. Some cells (one or two per battery) in the suspect batteries were not bubbling while charging. I did not use the remote charger on the good ones, only the Delta Q cycle, which did not complete to maintenance level. They read: 12.49, 12.64, 12.76, 13.25, 13.32. After looking at all posts related to Delta Q and flooded batteries I understand the limitations of running with one bank, but am not ready to replace the 8 batteries or convert to Li just yet.
The fuse holder under the contactor, the MPC, and Delta-q charger connections are all sound with nothing burnt.
Given that the attached Polaris OEM and the Modified 4 Battery diagrams are accurate for battery placement, connections, and numbering, they can serve to better understand your responses some questions about using 1 bank.
==================================================================================
Please help with the following while keeping in mind I'm not well versed in this. Hence, the diagrams as a reference if you please.
1) Confirm that the best placement for one bank is on the Left side. R side would be better for me but perhaps some of the cables won't reach as well or some other limitation)s).
2) Confirm the cable (+, =) connections for those 4 good batteries are correct as seen in the Modified diagram and that the +, = cables going to the Controller are correct from #4 battery to the Contactor
3) Can the unused pink SOC wire from the R bank (+ at #8 battery) be connected to a battery on the L bank? If so, which one? ...and leave the existing pink one as is (+ at #3 battery). This is to have some functionality of the SOC gauge, i.e. hours used if possible.
4) Since the Aux gauge connections on the R side are no longer needed, do the existing connections on the L bank for Aux gauge (#3 neg and #4 pos) on the L bank remain as is or better elsewhere? Also, would the Aux gauge still read 48V from the one bank(50.92 V = 100%) as it did for 2 banks (same 48V) but with less capacity and expected faster discharge)?
5) Current Delta Q algorithm is 11 . I got that from a members post some years ago. Likely that should be changed since it has boiled some of the batteries in the past. Delta-q website (https://support.delta-q.com/hc/en-u.../hc/en-us/articles/360015623471-US-Battery-Corp-Batteries-Algorithm-suggestions) does not show it as an option for my batteries. Perhaps it should have been 71 all along (145 Capacity @20 Hour Rate). As stated, algorithm 11 does not show for US 12VXC. It shows 200 & 210 Capacity @20 Hour Rate for the only two other 12V batteries. BTW: is Capacity @20 Hour Rate the same as Ah?
What is a better algorithm and why? I read on this Forum that 71 (generic 140-200 , 155Ah for a 1x4 pack) is best. Please conform or offer alternative.
6) Is there any use in attempting to charge the suspect batteries again with the external charger? I only did it one time but the charger was unable to complete the full charge cycle as happened with the Delta-q. I did not disconnect any cables between the batteries to manually charge them. I did use the Delta-q again. I runs through its sequence until it stops at II, then reverts to fault mode blinking red. After a 4 hr rest the respctive voltages of batteries 1 through 8 were essentially the same at: Bank1, 12.58, 9.58, 12.78, 12.91 and Bank2, 13.13, 12.92, 10.87, 10.84
Question: are using batteries #1 (12.58V), #3 (12.78), #4 (12.91), #5 (13.13) viable for using in 1 pack, while keeping #6 (12.92) as a reserve, and discarding #2 (9.58), #7 (10.87), #8 (10.84)
7. Leave the nonfunctional batteries in place on the EV means a weight penalty (450 lbs) but I'd find it difficult to store them elsewhere. How critical is that reasoning since I use the EV very little in the mountains of NC (paved to reach some trails now and then).
8. Was there any significant consequence in not removing any cabling when the individual batteries were charged with the external charger? I read in the forum to "disconnect one cable in one of the two strings that fully breaks the circuit and will stop any flow between the two sides of the pack."
9. Anything else to consider? Thanks for taking the time to have a look and share your knowledge.
