#152931  by hughstott
 Wed Jul 10, 2019 4:15 pm
I have a votronic Battery monitor with 12v 300ah of lithium batteries. In the setup of the monitor the battery type setting is 4, which on the table on page 1 is not listed should I change the setting to 82 or 89. I remember going through the settings with Pierre and he said that the battery type should be on 4
 #152944  by Nut17
 Thu Jul 11, 2019 3:28 am
Hi Hugh

It may pay to contact AA Solar for clarification on this as the facility for multiple LiFePO4 battery type inputs may well only be for the models with the new shunt. I suspect the new models have come on sale since Pierre sold up and moved on. I note that if you click on the the installation and operating manual on AA Solar's website the instructions still show battery type 4 as the only setting. I suspect that may well be using 14.8 volts as the "full" setting. My new monitor that I have yet to install will be set to 89 as I will be using 13.8 volts as my bulk charge voltage.
 #152946  by hughstott
 Thu Jul 11, 2019 8:06 am
Thanks for that Chris. The problem I,m having is as the batteries are charging the voltage creeps up to 14.9v when the charging is complete and then slowly drops to 13.6v . This is by charger or solar. The charger is a Victron 12/50 3 stage and 1000w solar with 2 controllers operating 500w each. I just haven't seen the voltage go that high before. It would usually go from about 14.8 then slowly drop as it reached full charge. The difference being it now waits until the battery is fully charged before dropping back to 13.6v and the 14.9v when it used to be 14.8v
 #152954  by scubadoo
 Thu Jul 11, 2019 10:05 am

Assuming we are still talking LiFePO4.
Your charging source(s) are set too high! Can they be set to lower voltage levels? If not then I would suggest you have unsuitable chargers/controllers.
LiFePO4 and 14.8(9)V should never be mentioned in the same thread. :?
14.9V is far too high and will do your battery no good long term! A minimum 3.725V (if all balanced - unlikely) cell voltage is well out of spec.
In four years of fulltime travel with an AA Solar supplied 300Ah the highest voltage ever recorded was 14.3V.

All measured at the battery terminals.
My almost unused Victron mains powered 30A battery charger reaches 14.2V and then "floats" at 13.50V.
The Victron solar controller reaches 14.2V then "floats" at 13.45V.
The alternator charging reaches a maximum ever of 14.25V limited by a Victron diode block.
 #152959  by hughstott
 Thu Jul 11, 2019 11:31 am
That's what worries me as they used to be all good for 4 years and these changes have only happened over the last 3 weeks. No changes have been made to the charger or solar controllers. The batteries are 2x 150ah AA Solar Lithium Battery ABAT. Supplied by AA Solar
 #152964  by scubadoo
 Thu Jul 11, 2019 5:12 pm
Are you measuring those voltages at the battery? Readings elsewhere could be misleading.
 #153022  by BUXTON
 Sat Jul 13, 2019 10:01 pm
To Reuben, JonH, and hughstott.
We're the lithium batteries you had power cuts with, were they the ABAT type blue coloured batteries please?
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