bonro001 wrote:On the option 1 comment, is there a reason that the 15 amp version would be better on the batteries?
Think of it like this, heat degrades the battery, high state of charge degrades the battery, put the two together and it isn't additive it is exponentially worse.
So the batteries have had a chance to cool until midnight, and charging is completely during the coolest time. In addition, bringing up the batteries at 15 amps has the added effect of leaving the batteries at a lower state of charge for a longer period of time.
As a final benefit, charging at L2 is more efficient than at L1 (110V ) due to the overhead losses inherent in charging.