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  1. E

    Please Check: Ready to Start Building this Design

    Here is what I installed. It's a small breakaway battery and case, with press-to-test feature. @smoothJoey convinced me a separate battery for the breakaway system was worth while and at $13 (as of 10/06/20210) this one is pretty much a no brainer! https://www.amazon.com/gp/product/B011A0ZC7O...
  2. E

    Please Check: Ready to Start Building this Design

    Wow, Amazon had a break-away kit with case, battery and wiring for under $15! I'll need to reuse my existing switch and dig up some self-tapping mounting screws.
  3. E

    Please Check: Ready to Start Building this Design

    Though I am still curious about the validity/practicality of the idea @12VoltInstalls raised of using a diode to prevent backflow (for lack of a better term) from the house battery to the tow vehicle. @shadowsteve was also commenting/asking about the use of a diode. I'm not sure his...
  4. E

    Please Check: Ready to Start Building this Design

    OK, I'm 100% sold on a separate breakaway setup! 😄 Now it seems like very inexpensive insurance. Thanks for all of your knowledge and help!
  5. E

    Please Check: Ready to Start Building this Design

    :) Yes, now that I look at it again I can see it does! Having the house battery feed current to the brake controller's output. OK, now I'm 95% sold on a separate breakaway setup.
  6. E

    Please Check: Ready to Start Building this Design

    Sorry. The reply was to 12VoltInstalls. Forgot to hit the reply button. I have edited that post for clarity.
  7. E

    Please Check: Ready to Start Building this Design

    Your notation is very cool! It took looking at your notation for a few minutes until the light went on - then it was "way cool"! Here is my attempt at an update: dc_domain { pos { |<-disconnect<-house_batttery.pos |->mini_breaker->load_center.pos |->breakaway_switch->|->brakes.pos...
  8. E

    Please Check: Ready to Start Building this Design

    OK @12VoltInstalls , I understand what you propose and it seems like clean, safe and very low maintenance solution! Though I am curious why you "really don't like" having your brakes powered by the house battery (as that is what my current plan is)? @shadowsteve asks some great questions as...
  9. E

    Please Check: Ready to Start Building this Design

    Yes, sorry the lines are so light. No problem though. Hopefully a larger drawing and a better description will help. C/S = Curb Side and R/S = Road Side. I just recently figured it out as RV lingo (instead of the driver's side & passenger side we use in car lingo). Yes, the brakes are...
  10. E

    Please Check: Ready to Start Building this Design

    Thanks for the feedback! And thanks for the tow safety concern. It's one we share. The trailer has always been front heavy - I think because it has a rear "garage" storage area for bikes, etc. We will verify proper tongue weight (with a tongue weight scale) and payloads (at a Cat Scale)...
  11. E

    Please Check: Ready to Start Building this Design

    Anyone else have thoughts or see problems with my design? All feedback is appreciated! -Eric
  12. E

    Please Check: Ready to Start Building this Design

    The solar panel and SCC are already owned - purchased well before I found this site and started getting educated. :( You are likely right! I can see myself updating the system this winter with 1 or 2 of those 460W panels you recommend - and maybe another battery or two. Actually, late this...
  13. E

    Please Check: Ready to Start Building this Design

    Hi McCarthy, The distance from both the AC1260 charger and the SCC to the +/- blocks will be 6-10 inches at the most. Is this OK without adding the fusing you mention? Does the other fusing and wire sizing seem reasonable as well?
  14. E

    Please Check: Ready to Start Building this Design

    LIABILITY RELEASE: I hereby release anyone and everyone from any and all liability related to advice given in response to this request for help. Including all replies, replies to replies, replies to my follow-up replies, etc. Hello, Sorry this is a cross-post. This was posted in the Safety...
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    Please Check: Upgrading Trailer to LFP and Moving Batteries to Rear

    Updated (including liability release) and moved to: https://diysolarforum.com/threads/please-check-ready-to-start-building-this-design.28587/ Please help me if you can!!! Thanks!, -Eric
  16. E

    Please Review and Comment on this Newbie's Design!

    Also, for the 10-12 foot run (from the DC panel at mid-trailer to the rear closet where the 2 batteries will be) I thinking 4 AWG wire. I've checked a few different wire gauge charts/calculators (Blue Sea, Wire Barn, West Marine, etc.) and with a 3% voltage drop the 4 AWG should be good up to...
  17. E

    Please Review and Comment on this Newbie's Design!

    Yes! The WFCO 8900 series is made up of 3 distinct parts: AC breaker panel, DC fuse panel, and a 120V to 12V converter. The converter portion is actually a user replicable part - installing a new one is quite straightforward. I will just disconnect the converter portion. Here is a picture...
  18. E

    Please Review and Comment on this Newbie's Design!

    Most everything I have been reading is to add a 25% factor. Is there a specific reason you are recommending 50%?
  19. E

    Please Review and Comment on this Newbie's Design!

    Charger Fuse Thinking The user manual for the 60A charger calls for an 80A fuse. This seems in line with my calculation (if I'm applying the formula correctly): 60A x 1.25 = 75A. The closest ANL fuse I found was 80A, so that is what I have used in the diagram above. DC Panel Fuse Thinking The...
  20. E

    Please Review and Comment on this Newbie's Design!

    Hi All! Please review and comment on this second revision of my first ever design. Greatly appreciated! Thanks to @Short_Shot, @eXodus , @Zwy , and @HRTKD for valuable feedback on the first revision Background: We have a Lance 2185 travel trailer that I want to upgrade from FLA to LFP...
  21. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    OK, great. I will redesign with an AC charger and create a new thread. Thanks for the help!! -Eric
  22. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    Also, say I went with something like a Victron Blue Smart IP22 12-Volt 30A 120V Charger. Can you suggest a straight forward way to add in our portable solar panel? Thanks!
  23. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    While my design failed to meet my redundancy requirement I would like to know if the design would have worked. Based on the clarifications I made to my original post, were the problems solved? Or, are there still issues mentioned like charger to charger conflict, shorts, etc.? Thanks to...
  24. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    Wow, up until reading your post, I somehow missed that by using the WFCO converter to power the DMT1250 I still have a single failure point. The DMT1250 can fail and I can fall back on charging with the WFCO. But if the WFCO converter fails... were soon in dark. :oops: It looks like you have...
  25. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    The DMT1250 was $300 delivered from Don Rowe. I'm happy with the value due to the redundancy gained, 50A charging, the simple (even if basic) programming, and that it includes a MPPT controller as well. Thanks for the input, eXodus. -Eric
  26. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    Please see my reply to Short_Shot above and let me know if you think there is still a short. Thanks for the input! -Eric
  27. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    OK, you guys have me worried! Though I think my design will work. The WFCO 8900 series has three parts: AC breaker panel, DC fuse panel, and a converter. Let me clarify what I said in the first post: "So, my idea is to use the WFCO 8955's 12VDC converter to power the DMT1250, and nothing...
  28. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    I've left out a key detail. My primary purpose is for added reliability / redundancy for DC power. It seems these WFCO converters seem to have a poor reputation. If all goes as planned my wife and I will be taking multiple cross country trips over the next couple of years. I'll disconnect the...
  29. E

    Am I Heading in the Right Direction? A Somewhat Unique FLA to LFP Conversion!

    Hi All! Please review and comment on this first stab at drawing up my oddball project. Greatly appreciated! Background: We have a Lance 2185 travel trailer that I want to upgrade from FLA to LFP. Initially I was going to do a full solar plus hybrid inverter/charger build for our trailer...
  30. E

    Never Mind: Reposted in Another Section

    Here is the repost case you are curious: https://diysolarforum.com/threads/am-i-heading-in-the-right-direction-a-somewhat-unique-fla-to-lfp-conversion.28174/
  31. E

    RV 24v vs 12v redundancy...

    Here is an interesting thread where the OP made a simple hack that allows his BMS to turn the DMT1250 on and off. https://diysolarforum.com/threads/kisae-dmt1250-partial-disassembly-and-remote-disconnect-addition.15454/
  32. E

    RV 24v vs 12v redundancy...

    The KISAE/Abso AD to DC & DC to DC chargers look interesting. They have selectable levels for charge voltage, float voltage, charge current, and charge termination (in amps). Is this what we are looking for? -Eric
  33. E

    RV 24v vs 12v redundancy...

    For our travel trailer upgrade I am currently considering the Aims Power AC Converter / Battery Charger 12V & 24V Smart Charger 75 Amps (CON120AC12/24DC), as it will charge at both 12V & 24V. If I'm thinking correctly, this (along with other details I'll not go into in this thread) should help...
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