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We have 2x 120 12 v AGM batteries in parellel so 240 amp the fridge draws on average 4 amps per hour , we are fully charged by sunset . Now I would expect to see consumed amp hours by the morning as the fridge has been cycling and tv been on ect . Now in the morning the BMV reads 1 amp hour consumed soc 100% the voltage says 12.8 surely this cannot be correct . We are at a loss now on how to fix it the wiring at the batteries we feel is correct. Any input would be greatly appreciated.
RE The battery Negative connections
There should be one wire ONLY (Neg) going to the shunts Bat Neg connection ALL OTHER Neg wires should be on the LOAD side of the SHUNT
NOTE:
NO OTHER WIRES ON THE NEGATIVE BATTERY TERMINAL only the one going to the shunt.
MOVE AL:L OTHERS to the load side of the shunt
Thank you Paul B for the answer I have all the negative into a bus bar then that to the shunt .
neg battery to shunt then shunt to bus bar and all should be working fine.
no negative from any battery should be going to the bus bar.
all the negatives from all the batteries to the shunt
or
all battery negs to there own bus bar then from that bus bar to the shunt
remove this wire
This wire goes from the load side of the shut to the bus bar
NO OTHER WIRES ARE TO BE ON THE BATTERY SIDE OF THE SHUNT
Right got it so now I have 1 lead from negative from the battery to the shunt battery side then a lead from the load side of shunt to the bus bar . So now this should be correct . Sorry to be a pain but electrics have me beat . I appreciate the help if ou can confirm now I have it correct thank you
sounds correct, now you will have to test and see if all is correct in its operation
Thank You
Ok all wiring seems correct just not sure on the settings now 2x120 amp hour agm in parallel charging with a solar REDARC 1240 BCDC charger float voltage is 13.3v absorption is 14 .5v playing around with settings just can’t seem to get it right for it to sync automatically.
I am right to think the charged voltage should be 14.2 v and the tail current to be 1% and 3 mins Peukert 1.25 and last string 95%
Should these settings sync automatically.
Any thoughts anyone .
