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Which IP22 charger to buy (10A/20A/30A) for two battery sizes?

Hi,


I plan to buy a Blue Smart IP22 charger for my two cars, but wonder which one is most suitable:

Car 1 has a 95Ah AGM lead acid battery

Varta recommends to charge these with I=0,25C to 0,35C, so between 24A and 33A

Car 2 has a 70Ah flooded (conventional) lead acid battery

Varta recommends to charge these with I=0,1C to 0,15C, so between 7A and 11A


The IP22 12/30 would charge the AGM battery fastest, but is it safe to charge the 70Ah battery in low/night 15A mode? That would equal 0,21C and exceed Varta's recommendation.


I'm a bit puzzled, because the C values in the Victron IP22 manual seem very high:

IP22 12/10A -> minimum battery size = 30Ah (0,33C)

IP22 12/20A -> minimum battery size = 40Ah (0,5C)

IP22 12/30A -> minimum battery size = 60Ah (0,5C)


Cheers,

Robin.

Blue Smart Chargerip22
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