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Itinerant1

Itinerant

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Posted: 09/20/20 07:00am Link  |  Quote  |  Print  |  Notify Moderator

No it didn't work. Take a screen shot and post as a picture. Or use a free pfd uploading host site, it will give options on how you want to post it in a thread.


12v 500ah (5,120Wh usable), 20 cells_ 4s5p (GBS LFMP battery system). 8 CTI 160 watt panels (1,280 watts)2s4p,Panels mounted flat. Magnum PT100 SCC, Magnum 3012 hybrid inverter, ME-ARC 50. Installed 4/2016 been on 24/7/365, daily 35-45% DOD 1,600+ cycles.

pianotuna

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Posted: 09/20/20 08:49am Link  |  Quote  |  Print  |  Notify Moderator

Steveh27,

The LI are fine.

The wiring is also fine.

The alternator needs to have a duty cycle that will accommodate 50 amps continuous. Research the make and model of alternator.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, soon to have SiO2 batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

steveh27

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Posted: 09/20/20 03:02pm Link  |  Quote  |  Print  |  Notify Moderator

need to learn again about posting jpgs. DO I need to have them on some other online site first?

BFL13

Victoria, BC

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Posted: 09/20/20 04:53pm Link  |  Quote  |  Print  |  Notify Moderator

steveh27 wrote:

need to learn again about posting jpgs. DO I need to have them on some other online site first?


http://photoposting.is-great.net/?i=2


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msmith1199

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Posted: 09/20/20 11:43pm Link  |  Quote  |  Print  |  Notify Moderator

steveh27 wrote:

Here's a site I found:

https://shop.pkys.com/Alternator-Lithium-Battery.html


The info in this article is pretty much exactly what the techs at Battleborn batteries told me. And I have purchased the DC to DC converter. Now just a matter of finding someone to install it. Everybody around here is booked and I don’t have the knowledge to install it myself. It looks easy but it needs to be installed and the old wires need to be disconnected. Hopefully the old wires can be used on the DC to DC converter so new wiring doesn’t have to be run throughout the motorhome. But that’s all above my pay grade. I don’t even change my own oil!


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steveh27

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Posted: 09/21/20 04:43am Link  |  Quote  |  Print  |  Notify Moderator

Hope this works for the 4 pages of battery specs:

[image]

[image]

[image]

[image]

Thanks for the help.

msmith1199

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Posted: 09/21/20 09:14pm Link  |  Quote  |  Print  |  Notify Moderator

Okay, for the latest. I contacted an installer recommended by the battery company. He told me since my motorhome was so new I may already have a DC to DC converter in it and he suggested a contact the motorhome builder to see. So I contacted my motorhome builder to see if they had already installed a DC to DC converter and told them what I was trying to do. This is their reply to me:

Mark,

A DC / DC regulator / converter is unnecessary to use lithium ion batteries on the house side, our BIRD (bi-directional relay/ delay ) already serves that purpose. There should not be any modifications necessary to use lithium ion batteries on the house side.


So I called the tech at the Battery Manufacturer and told them about this BIRD thing, and they disagree that it will replace the the DC to DC converter. So now I have no idea what to do! Any ideas? I do have an appointment to meet with the installer on Thursday and I’ll see what he has to say.

BFL13

Victoria, BC

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Posted: 09/21/20 10:42pm Link  |  Quote  |  Print  |  Notify Moderator

Going around in circles here [emoticon] This came up earlier and explains it all for DC-DC and some good diagrams. Just get your guy to do which applies to yours. The MH builder is behind the times it seems.

https://shop.pkys.com/Alternator-Lithium-Battery.html

01tundra

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Posted: 09/22/20 06:14am Link  |  Quote  |  Print  |  Notify Moderator

I'm running a Victron Orion 12/12-18 DC-DC charger with a dedicated 4AWG charging circuit from the truck. I get 25A out of it at peak charging and don't have to worry about the truck's alternator voltage fluctuation or it being harmed.

The charger has settings that allow it to sense alternator current to automatically start/stop to prevent the trailer LiFePO4 batteries from drawing down the truck lead acid batteries when the engine is off.

[image]

[image]

[image]

[image]

[image]


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pianotuna

Regina, SK, Canada

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Posted: 09/22/20 08:55am Link  |  Quote  |  Print  |  Notify Moderator

I think the issue is over voltage to the LI battery bank, not protection of the alternator.

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