Upgrading our system

[M&B]

So we are Fulltime rvers and upgrading our present system. We presently have 4 panels wired in Parallel to roof JB. #4 wire running to BlueSky CC.
Present panels are:
2 -170 watt & 2-175 watt & 4 6v golf cart batteries.
Small 1000 watt inverter. ( pics attached of panels). It has worked great for the last 5 years but time to ad on. We do have some shading this is why we originally ran in parallel.

We have order 2 -200watt panels ( attached) and a Victron 150/85. TR and New batteries are 4- 12v 100 amp Li Time Lithium.

How should we wire these now and did we mess up and order to small of a CC?

Thanks

 

[Rednecktek]

My thought would be to keep the 170w panels connected up as is, throw the 200w panels on a different controller, and just connect both controllers up in parallel. Other than changing the charging profile from lead acid to LFP the controllers should work just fine and you can just pull the leads and bolt in the LFP's.

 

[MisterSandals]

We presently have 4 panels wired in Parallel

This is nearly 40A, your MC4 connectors(if thats what you are using) are only rated to 30A max. This is a fire hazard, even worse if you don't have the 4 panels individually fused.

How should we wire these now and did we mess up and order to small of a CC?

Fortunately your 6 panels are matched fairly well.

340W + 350W + 400W = 1100W
1100W / 14V charging = 78A (looks good as you will get closer to 60A with flat panels)

If you can pick 2 differently shaded sections, you should wire 3S2P for your 150/85.

If you can make 3 differently shaded systems then 2S3P is your best option with a single controller. You would need to fuse the 3 strings (MC4 inline fuses are pretty cheap and easy).

 

[M&B]

This is nearly 40A, your MC4 connectors(if thats what you are using) are only rated to 30A max. This is a fire hazard, even worse if you don't have the 4 panels individually fused.


Fortunately your 6 panels are matched fairly well.

340W + 350W + 400W = 1100W
1100W / 14V charging = 78A (looks good as you will get closer to 60A with flat panels)

If you can pick 2 differently shaded sections, you should wire 3S2P for your 150/85.

If you can make 3 differently shaded systems then 2S3P is your best option with a single controller. You would need to fuse the 3 strings (MC4 inline fuses are pretty cheap and easy).

 

[M&B]

Sorry I thought I put that in my OP. We have terminal ends, do not use MC4. Each panel is individual fused.

 

[Supervstech]

Both plans have merit.
Mr sandals plan would be easier to implement and wire.