Very pretty, pity he doesn't know much about what he's doing but he sure sounds like he does eh

More switches than you can poke a strike at and most are redundant anyway, the 2 gigavacs cut the loads and charging so that isolates the battery as far as the charging and load so no need for a separate switch for the system and and then for the inverter ... why wouldn't you just switch the inverter off at the inverter or the remote? Simply turning the charge off will kill the Victron MPPT controller, maybe not the first time but do it too often and ...... as for the Victron inverter charger, it would have a major fault because he is cutting the charger output without altering the battery sensing cable voltage ... it will just keep ramping up the output trying to get a voltage change at the battery, which it can't because the output to the battery has been cut so .....
Just because a cell hits 3.5v doesn't mean the end of charging, far from it and will result in serious memory charge issue up the track .... especially because he doesn't understand that you can't build a 400Ah house battery using single 400Ah cell without balance issues driving you and the system mental and create issues that just never happen when the battery is built properly.
Why have a 200amp shunt and a 300 amp fuse? If that cable was subjected to the 300+ amps required to blow the fuse, the smoke would have come out of those cables well before then ....... it is only a 24v system, he doesn't need to use those type of fuses anyway ..... Why a circuit breaker after the Victron MPPT controller? Those NoArk circuit breakers come in 16 amp, 40 amp and 63 amp in that configuration, why use a circuit breaker where a midi fuse in the positive cable would do a better job? All the charger outputs into the one busbar, certain to create issues with the chargers he is using because that all sense through the output cable, so each one senses the output from the other chargers so throttle back to lower their output voltage ..
The list goes on and on, no proper charge controlling, relying on a cell balancer to stop cell damage by stopping charging at 3.5v, yet the balancing doesn't start until 3.45v? Doesn't he realise the cell voltage will drop by a minimum of 0.5v as soon as the charging stops and a further 0.5v as soon as a load is applied? So effectively the balancer never functions .... Very pretty but ...... shitte what a mess to sort further up the track when the whole lot goes pearshaped ......
T1 Terry