Since these particular breakers are usually used as main breakers in DC systems, there might be a problem with the AIC rating, which for this device is only 2500 amps. ABYC requires breakers to meet certain AIC ratings based on the size of the battery bank, or more precisely the CCA rating (cumulative) of the batteries they are connected to. the problem here is that the minimum requirement is for a 1500 amp AIC rating for a master breaker, and that is for a battery or battery bank that only has a cumulative Cold Cranking Amp rating of 650 or less. That folks is a pretty small battery. Typically a standard group 24 size, and no more. As soon as you add a second battery or move up to say a group 27 size, you are going to be past that 650 Amp CCA rating. That means, according to ABYC, that you are going to need to up your AIC rating for that first main circuit breaker to a minimum rating of 3000 amps AIC. So, Rob, not sure what you have for a battery or batteries, but this install may not be compliant for that reason.