Building a 48v system help me spend some money.

[Awesom-0]

First post and first time putting together a system.

What is ordered so far is a Victron 48v Multiplus-II 5kva 120v 70amp, 2 EG4 LL-S batteries, and an EG4 3-slot battery rack.

I know this isn't light but for now it will be semi-portable, I can move it in pieces easily enough, and it will eventually be permanently mounted at an off-grid cabin. For ac input it will be a normal 120v cord I can plug into a socket. Inverter weigh's 75lbs by itself so I might mount it to a 2 wheeler like Will did in his video and use the biggest Anderson connector for the battery rack.

I believe a string of 4 panels is what I want with the option to upgrade to another string of 4 in the future. I am not sure which panels or charge controller yet.

Do I need anything special for those batteries to charge correctly with the Victron inverter/charger and solar charger?

Appreciate any ideas for extras I may want and suggestions for the rest of the parts I need.

 

[BatteryBuff]

You might as well stay with Victron and go with a SmartSolar MPPT 150/45. Just check to see if it will meet your current and expansion needs.
The batteries will work with the MPPT and inverter but I don't know if the batteries will communicate SOC to the Victron system.

 

[Awesom-0]

You might as well stay with Victron and go with a SmartSolar MPPT 150/45. Just check to see if it will meet your current and expansion needs.
The batteries will work with the MPPT and inverter but I don't know if the batteries will communicate SOC to the Victron system.

I stayed with Victron and then some...

After weighing the pros and cons and planning to eventually living at my cabin full time I spent a bit more lol. Picked up a third battery to fill up the rack, Victron MPPT RS 450/100, 10 Silflab 430w panels, Lynx distributor, Lynx power in, and 4 pole IMO DC disconnect for the panels. Extended warranties on the inverter/charger and solar charge controller.

Now I need to figure out which breaker box I want for the AC outs and what plug for the AC input that will only be used on a generator or a regular outlet with an adapter. I think I am running 2/3 wire from the inverter to the breaker box, I get lost in the numbers and finally started writing things down haha.

Frustrating relearning things you forgot a decade or two ago. But plenty of time until spring, I still need to cut out a driveway and put down a tinhorn for anything other than a 4x4 with locking differentials to get on the land.

 

[Awesom-0]

Finding the stranded wire Victron wants was a chore and the min length requirements meant I ended up with more than enough to expand.

Regular main panels were too large for what I wanted to do so I went the marine route with a Blue Sea 8074 because analog gauges are cool. And since the max on those main breakers is 50amps I added another small main. Both attached to a 600v 175 amp distribution block to also switch from the type of wire Victron wants to normal stuff. And one more 50 amp mini breaker for the AC input.

Main panel panel will be on a project box. I think it will be deep enough I can put the victron 48v to 12v converter inside with a 12v DC fuse panel with some anderson plugs on the sides and one vehicle "accessory" port.

Think I have it all ordered now except whatever connectors I am missing, even remembered a grounding rod.

Need to decide on a mount for the solar panels. Space on the ground isn't an issue but I keep thinking a better use would be to use them for some shade. Not sure how big of hail these can actually take it can get bad in Oklahoma, I might rig up a retractable golf net.

For the AC input I can wire it like a 50 amp RV plug, using a dog bone to a normal outlet, set the correct amps, and be fine? It will have a 50 amp Blue Sea breaker. Only using the RV plug in case I want/need to use a generator. In actual use I will likely set it to 10 amps once and leave it there. It will have a male plug on the cable of course.

I think everything is correct, might do a test fit in a week or two depending on the weather. Wire gauge isn't going to be an issue anywhere, I have oversized wire for everywhere but the 2/3 wire coming from the inverter to fit it all in a 1" conduit with some 12v line sneaking through to the Cerbo. The other AC output will not be wired for use. Wire will be oversized because of minimum order sizes haha. I'm sure it will get used, family in Texas has some remote land wanting some power.