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    Please Help Size a LiPo Battery for My Portable Air Compressor

    Hi All, I have a small portable RV air compressor that you typically connect to a car battery as a power source. If possible, I would like to attach a small LiPo battery to the compressor an eliminate the need to string the power cord to my truck battery. In other words, to have the compressor...
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    Safety check

    My build was also space constrained, so I had to go with a two-layer configuration. Maybe something in this will be helpful, for the spring, if you decide to reconfigure your system...
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    12Volt, More of good information! Thank you! -Eric
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    The KISAE AC-to-DC and DC-to-DC chargers aren't nearly as programable as Growatt or Victron products. Maybe another way of saying it is this: a Victron or similar has programmability, while the KISAE units have flexible settings. However, they seem to have enough settings to get the basic job...
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    Thanks for the further input! The C-Head (that name cracks me up!) is very intriguing - I've bookmarked that link. Our grey tank would probably be the next limiting factor if we started onboarding more fresh water, and this would help in that regard. -Eric
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    Thanks for the complement, SJ. And thanks again for your help! -Eric
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    Yes, the Pro Power on Board feature is really well executed. Also, the 3.5L twin turbo and hybrid electric motor combine to deliver 430 horsepower and 570 lb.-ft. of torque. The difference between this and our 2008 Dodge Ram Laramie with the 5.7 Hemi is dramatic. Powerboost is Ford's name for...
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    Great question, Whinny. I meant to include this in the write-up. Originally, I was going to power the breakaway switch with the house batteries in the new build. However, both @smoothJoey & @12VoltInstalls ganged up on me helped me see the wisdom of having a dedicated breakaway battery (or...
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    Here with the two boards completely installed. So now the new batteries, charger, etc. are installed, but how is this power fed to the trailer's existing 12V system? Well, this was accomplished by running 4 AWG cables from the batteries in the rear to the existing DC fuse panel at mid-trailer...
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    Unique Travel Trailer LiFePo Conversion – Compact Two-Layer Build

    Earlier this year the wife and I began dry camping (aka boondocking) and we now prefer this over RV parks. About this same time the lead acid batteries that came with the trailer were failing and it seemed like a good time to upgrade the power system. The initial idea was to just put a couple...
  11. E

    == SOLD == NEW! Growatt SPF 3000TL LVM-24P 120V/240V Solar Inverter

    Thank you @FilterGuy! It seems you know more than I. :)
  12. E

    == SOLD == NEW! Growatt SPF 3000TL LVM-24P 120V/240V Solar Inverter

    == SOLD == Here is a brand new Growatt SPF 3000TL LVM-24P 120V/240V Solar Inverter Split Phase 3000VA / 3000W with 80A MPPT. This was purchased from Watts 247 for a solar build-out of our travel trailer. However, we subsequently purchased a Ford F150 Hybrid with the Pro Power on Board feature...
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    Please Check: Ready to Start Building this Design

    ? Yes. And only the ken and barbie battery.
  14. 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 10/06/2021) this one is pretty much a no brainer! https://www.amazon.com/gp/product/B011A0ZC7O...
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    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.
  16. 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...
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    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!
  18. 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.
  19. 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.
  20. 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...
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    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...
  22. 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...
  23. 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)...
  24. E

    Please Check: Ready to Start Building this Design

    Anyone else have thoughts or see problems with my design? All feedback is appreciated! -Eric
  25. 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...
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    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?
  27. 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...
  28. E

    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
  29. 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...
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    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...
  31. 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%?
  32. 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...
  33. 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...
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