Amp limit

[ClassicCrazy]

According to the East Penn for bulk of flooded lead acid
30% of C20

215/20  x 30% = 3.23

which seems low so if you multiply it by 4 = 12.90

I don't think that is the right interpretation of Deka's instructions.

Their reference to the the "Max. Current =  30% of C/20"  means that the max charge rate is 30% of the battery amp/hr rating at the 20 hour rate, so 215 x .3 = 64.5 amps.

For clarification check their glossary:  "C/20 -Battery capacity measured in Ah at the 20hr rate"

The other equation they have is
6 x I/20   
I just don't get what current they refer to for  the I would be ?

The  I/20 would be the current rate required to deliver the full capacity of the battery over 20 hours, so 215/20 = 10.75 amps
So, 6 x I/20 would be  6 x 10.75 = 64.5

Either method of calculating should come up with the same result. No?

You may be correct. I let my batteries charge at the full current available from my panels and have not worried about limiting the max amps.

[boomadge]

I stopped limiting the amps and have noticed no ill effects. This makes me believe 64.5 amps is the max input.

[SM-Viper]

I have a these same batteries and that is my understanding of it as well. Full throttle up to 60 amps.

-Sean

[MadScientist267]

You people scare me.