I want to make sure I'm properly doing the initial charge on my Victron Lithium Smart batteries. I have two 25.6v 200Ah batteries that will be wired in series. The battery manual strongly recommends doing the initial charge with a BMS, and the example shows an IP43 charger and the Small BMS. The professional video about batteries also suggests this combination. This would be about $400 for something I will use once. My system includes a Lynx Smart BMS. My dealer suggested an IP67 Smart charger for the initial charge, but it's not clear that I can use a BMS with that charger (and I prefer not to charge without the BMS). What is a cost-effective way to safely complete the initial charge of these batteries?