July 13, 20179 yr I have 4 x 10.4Ah (41.6Ah) 6S LiPo batteries from a obsolete drone project. Min/Max voltages are 21V/25.2V and the charger should normally be CC/CV. Problem is most solar chargers are meant for Pb batts and thus have different termination voltages. However, it would be great to use these for a small solar system rather than just have them sitting around getting old. I haven't seen any SCC's in SA for lithium batts, but there are a few places across the ponds that offer solar chargers with a lithium option. The DoD for lithium's is 80% so better than most Pb based batts. Anyone using lithium batts here?
July 13, 20179 yr 1 hour ago, Graham said: I have 4 x 10.4Ah (41.6Ah) 6S LiPo batteries from a obsolete drone project. Min/Max voltages are 21V/25.2V and the charger should normally be CC/CV. Problem is most solar chargers are meant for Pb batts and thus have different termination voltages. I know that the Aussie Li ion users set bulk and float to the same voltage thereby terminating charging.
July 13, 20179 yr 2 hours ago, Graham said: I have 4 x 10.4Ah (41.6Ah) 6S LiPo batteries from a obsolete drone project. Min/Max voltages are 21V/25.2V and the charger should normally be CC/CV. Problem is most solar chargers are meant for Pb batts and thus have different termination voltages. However, it would be great to use these for a small solar system rather than just have them sitting around getting old. I haven't seen any SCC's in SA for lithium batts, but there are a few places across the ponds that offer solar chargers with a lithium option. The DoD for lithium's is 80% so better than most Pb based batts. Anyone using lithium batts here? I have a DJI phantom charge that works from a car's cigarette socket. Connect a 10W or 20W solar panel directly to it and it will charge the lithium batteries.
July 13, 20179 yr 3 hours ago, Graham said: Problem is most solar chargers are meant for Pb batts and thus have different termination voltages. Victron 75/15 or 75/10 MPPT's are quite adjustable on just about all settings. And cheap. https://www.victronenergy.com/solar-charge-controllers/mppt7510
October 13, 20178 yr Author I have a Victron 75/15 but not the configuration cable or software, so not sure whether or not it can charge lithium batts natively. I have solved my issue by making up some 7S packs of the lithium cells which then have then very similar min and max voltages as PbAc's - 21.7V to 29.4V. These packs work great especially as one can use almost all the energy in the battery rather than the 50% one can get from PbAc's
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