jim_in_socal
New Member
For background, I have replaced my 4 x Group 24 SLA batteries with a single Epoch Essentials 300Ah LiFePO4 battery in the same exposed slide-out battery tray on the driver's side of my coach. I added a 300A MRBF to the positive terminal of the battery with 4/0 wiring to a disconnect switch which is connected to a 400A bus bar. I connected the negative side via a 4/0 wire to a Victron Smart Shunt which is then connected to its own 400A bus bar. All the existing OEM wiring for the 60A AC-DC Converter (which I've upgraded to a lithium version), a pair of 1000W inverters, the generator starter, the 12v house connections, and the house and chassis grounds were then reconnected to those bus bars and fuses/circuit breakers already in that battery compartment. The converter and inverters are in a compartment on the passenger's side so there are several 8-12' runs of 1/0 and 2AWG cable across the coach. Once I disconnected the BIRD/BIM to protect my alternator from overloading with the new lithium batteries, all is working as expected. I am now at the point now of adding a Renogy 50A DC-DC Charger with MPPT to allow my alternator to charge the house batteries and also connect 2 ground-deployed 400W solar panels. I am prewired for roof solar as well so I plan on adding panels with a Victron 100/50 MPPT in the future.
My question is this. I will need to run another set of 4AWG across the coach to the battery bank for the DC-DC Charger w/ MPPT and also prewire in a second set for the future MPPT. Would it by better and allow more future expandability (e.g., bigger inverters or a multi-plus) to run 7-' of new 4/0 wiring directly from the battery bank to the passenger's side basement compartment with something like a Victron Power-In (with mega fuse hack) which all my components would then connect to?I realize moving the battery bank itself would be ideal from a wiring perspective but unfortunately not realistic from a space perspective.
Any advice or experience with something like this? Any suggestions on additional fusing to protect that long 4/0 wiring run? I thought a 400A T-Class fuse between the battery and disconnect might be sufficient based on the 4/0 ampacity and expected load.
My question is this. I will need to run another set of 4AWG across the coach to the battery bank for the DC-DC Charger w/ MPPT and also prewire in a second set for the future MPPT. Would it by better and allow more future expandability (e.g., bigger inverters or a multi-plus) to run 7-' of new 4/0 wiring directly from the battery bank to the passenger's side basement compartment with something like a Victron Power-In (with mega fuse hack) which all my components would then connect to?I realize moving the battery bank itself would be ideal from a wiring perspective but unfortunately not realistic from a space perspective.
Any advice or experience with something like this? Any suggestions on additional fusing to protect that long 4/0 wiring run? I thought a 400A T-Class fuse between the battery and disconnect might be sufficient based on the 4/0 ampacity and expected load.