Help me review and rebuild my electrical system

Jan 6, 2014
89
Pearson Triton Cambridge
The PO has a kind of mishmash of exposed wiring and I'm trying to figure out what is good and what isn't as I rebuild. It will likely look like a horror story to many of you but this is where I'm at. Some of it is done quite well, I'm pretty sure.

Anyway...questions...some with pictures
1) There's some 2 way trailer park connections between the solar panel and the charge controller. I'm assuming these are totally a no-go. But if my solar panel terminates in MC4 cables, how am I supposed to get from the MC4 cables to the charge controller? I have to terminate those lines in something other than MC4 cables, no?

2) This is the wiring throughout the boat. Adequate?


3) I have two of these batteries (I have no inboard, so these are purely for the electrical system and charged currently by 1 100w Renogy Solar Panel).


I was a bad boy with the boat in a number of ways this winter (Learning process!). This is where they are at at the moment (I know I have the poles reversed!). Have I done them damage?


3) This is the switch and the controller as they stand. I understand that the controller is crap ($20 on ebay). Is the switch reasonable? I'm planning to replace the controller with a Genasun Controller. Ideally I'd like to add a second 50w or 100w panel. So I'm leaning towards this controller which would give me some space to expand. I assume that this controller would work with a 100w panel and my two 12v batteries but allow me to upgrade to 150 or 200w?
https://genasun.com/all-products/solar-charge-controllers/for-lead/gvb-8a-pb-solar-boost-controller/

Sorry for the open ended questions but I'm trying to puzzle out how to upgrade this system. My plan is to move the batteries back out of the cabin to a new spot under the cabin sole. Move the controller and the switch out of the bilge. Get rid of the trailer park connectors and any non-marine grade wire. Upgrade the controller to MPPT. Change lights out to LEDS.

Any suggestions/things I'm missing/ETC?

For the record, this is the panel as it stands. I don't love it or the location but it's been functional so far. I would love to replace it with something that has more switches at some point. But that won't happen this year.


Thanks
Paul
 
Feb 6, 1998
11,709
Canadian Sailcraft 36T Casco Bay, ME
The PO has a kind of mishmash of exposed wiring and I'm trying to figure out what is good and what isn't as I rebuild. It will likely look like a horror story to many of you but this is where I'm at. Some of it is done quite well, I'm pretty sure.

Anyway...questions...some with pictures
1) There's some 2 way trailer park connections between the solar panel and the charge controller. I'm assuming these are totally a no-go. But if my solar panel terminates in MC4 cables, how am I supposed to get from the MC4 cables to the charge controller? I have to terminate those lines in something other than MC4 cables, no?

2) This is the wiring throughout the boat. Adequate?


3) I have two of these batteries (I have no inboard, so these are purely for the electrical system and charged currently by 1 100w Renogy Solar Panel).


I was a bad boy with the boat in a number of ways this winter (Learning process!). This is where they are at at the moment (I know I have the poles reversed!). Have I done them damage?


3) This is the switch and the controller as they stand. I understand that the controller is crap ($20 on ebay). Is the switch reasonable? I'm planning to replace the controller with a Genasun Controller. Ideally I'd like to add a second 50w or 100w panel. So I'm leaning towards this controller which would give me some space to expand. I assume that this controller would work with a 100w panel and my two 12v batteries but allow me to upgrade to 150 or 200w?
https://genasun.com/all-products/solar-charge-controllers/for-lead/gvb-8a-pb-solar-boost-controller/

Sorry for the open ended questions but I'm trying to puzzle out how to upgrade this system. My plan is to move the batteries back out of the cabin to a new spot under the cabin sole. Move the controller and the switch out of the bilge. Get rid of the trailer park connectors and any non-marine grade wire. Upgrade the controller to MPPT. Change lights out to LEDS.

Any suggestions/things I'm missing/ETC?

For the record, this is the panel as it stands. I don't love it or the location but it's been functional so far. I would love to replace it with something that has more switches at some point. But that won't happen this year.


Thanks
Paul
Paul,

That controller is a "boost" controller and won't work with your panels. You would need a GV-10PB. It can handle panels up to 140w...

If you go to my site, link in sig, you will see an article on terminating with MC-4's..

That wire is fine and is tinned marine duplex wire..
 
Jan 6, 2014
89
Pearson Triton Cambridge
Ok got it. So if I wanted to up my panels to 200w...I couldn't do that with that controller? I guess 140w would be adequate.

Thanks!
 
Aug 22, 2011
1,113
MacGregor Venture V224 Cheeseland
And...you do no damage by connecting your multimeter backwards. No worries.
 
Jan 6, 2014
89
Pearson Triton Cambridge
Thanks!

I'm wondering if there is a good place to buy premade MC-4 cables? I think I really only need one set. Not sure if it's worth buying the crimper?
 

MSter

.
Apr 12, 2010
131
Sabre 38' MK II Oriental, NC
A crimper will be very helpfull when or if you move your batt's &/or re-wire your control panel. It's money well spent to get a good one.
Mster
 
Jan 6, 2014
89
Pearson Triton Cambridge
I already have a ratchet crumpet (the one mainsail recommends). I suppose I should buy the other one too though.
 
Jan 6, 2014
89
Pearson Triton Cambridge
Is there a set of battery dies to go with the crimper? If I could do the battery cables and the MC-4 cables I'd go for it.

Or is anyone around in the greater North Shore Massachusetts area who might have a battery crimper? If I could return the favor in kind, I'd be happy to. I'm at Liberty Marine in Danvers, but live in Boston.
 
Sep 28, 2008
922
Canadian Sailcraft CS27 Victoria B.C.
The crimper for MC-4 cables is for small wires - 10 being the largest I think. You need a different crimper for battery cables.
 
Mar 20, 2007
500
Catalina 355 Kilmarnock, VA
+1 for Genuinedealz. Have used them many times. Good products, outstanding service.