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RV DC Electrical System: Expert Guide to 12 Volt Systems
Electrical Medium 30 min read 129 👍

RV DC Electrical System: Expert Guide to 12 Volt Systems

Opened my RV this morning to find the 12V system going haywire — lights dimming randomly, fans slowing down, and the inverter shutting off despite full batteries.

Specifically, I need to understand the fundamentals of RV batteries - different types, proper sizing, charging requirements, and maintenance. I'm also confused about DC wiring best practices, what gauge wire to use for different applications, how to properly route and protect circuits, and where fuses and breakers should go. Voltage monitoring is another area where I'm lost - I see all these battery monitors and don't know what I actually need or how to interpret the readings.

I'm also planning some system upgrades down the road like adding solar or upgrading to lithium batteries, so I'd love to understand how all these components work together and what I need to consider for future modifications. Is there a comprehensive resource that covers all aspects of RV DC electrical systems from batteries and wiring through monitoring and upgrades? …more
How to Remove Firefly RV Control Panel: Complete DIY Guide (2024)
General Hard 45-60 min 129 👍

How to Remove Firefly RV Control Panel: Complete DIY Guide (2024)

Our 2019 Fleetwood Discovery LXE has a malfunctioning Firefly multiplex control panel that needs to be completely removed. I've been putting this off for months because I keep hearing horror stories about people cracking their panels or damaging the surrounding woodwork during removal.

I need to access the back of the unit for some electrical work, but I'm honestly terrified of breaking something expensive. The panel seems to be mounted flush with no obvious screws or clips visible from the front. I've searched everywhere but can't find a complete walkthrough that covers the preparation, actual removal process, and how to get everything back together properly.

Can someone please provide a detailed DIY guide that covers all the steps? I'm willing to take my time and do this right - I just need to know the proper technique so I don't end up with a broken control panel or damaged wall. …more
How to Upgrade Progressive Dynamics Converter for Lithium RV Batteries Safely
Solar Batteries Medium 2-4 hours 126 👍

How to Upgrade Progressive Dynamics Converter for Lithium RV Batteries Safely

Got a 15-year-old Progressive Dynamics converter that's starting to throw fault codes with my new lithium setup — worth upgrading or try making it work? I have a 2006 Lance 915 cabover that I recently upgraded with 2-200 watt Bouge solar panels and 2-100ah SOK lithium batteries.

The problem is I'm still running the original Progressive Dynamics converter charger that came with the RV, and I've learned it's not designed for lithium batteries. I'm worried about damaging my new battery investment.

What are my options for upgrading? I'm not sure if I need to replace the whole converter unit or if there's some kind of upgrade kit available. Any advice would be really appreciated since I don't want to mess this up! …more
Xantrex Freedom X 1200 Inverter Low Battery Warning: Critical 11.2V Fix Guide
Solar Batteries Medium 1-2 hours 120 👍

Xantrex Freedom X 1200 Inverter Low Battery Warning: Critical 11.2V Fix Guide

Walked into my new RV and discovered the previous owner left the Xantrex Freedom X 1200 inverter constantly throwing critical 11.2V low battery warnings. My Xantrex Freedom X 1200 inverter is displaying warning indicators on the panel, and I'm seeing some concerning voltage readings that have me worried about potential damage to my electrical system.

Here's the complete situation: My house battery is reading 11.2 volts, while the chassis battery shows 13.1 volts. The inverter panel is lit up with what I assume are low voltage warnings. I've been noticing the interior lights dimming significantly, especially when trying to run any appliances through the inverter. To make matters worse, it's currently overcast and getting dark, so my solar panels aren't generating any meaningful charge to help recover the battery.

I'm particularly concerned because I know lead-acid batteries can be permanently damaged if they're discharged too deeply. The voltage reading of 11.2V seems critically low to me, but I want to understand exactly how urgent this situation is and what my immediate next steps should be. Should I be looking at shore power connection, generator use, or is there something wrong with my charging system that caused this in the first place? I need to know both the immediate fix and what might have caused this failure. …more
RV MPPT Solar Controller E1 Error Code: Causes & Fixes
Solar Batteries Medium 45 minutes 118 👍

RV MPPT Solar Controller E1 Error Code: Causes & Fixes

Halfway through troubleshooting my MPPT solar charge controller's E1 error — would this be covered under warranty, or am I stuck paying out-of-pocket? The controller was working fine for months, but now it's completely stopped charging my batteries and just displays this E1 fault code on the screen.

From what I've read, this could be related to battery over-voltage conditions or possibly some kind of wiring fault, but I want to make sure I understand all the potential causes before I start troubleshooting. I'm comfortable doing basic electrical work myself, but I also want to know when this might be something that requires professional attention for safety reasons.

Can someone provide a detailed breakdown of what the E1 error specifically indicates, walk me through the proper diagnostic steps to identify the root cause, and explain the repair process? I'd especially appreciate guidance on how to safely approach this troubleshooting and what warning signs would indicate I should call in an expert instead of attempting the fix myself. …more
RV 3-Way to 12V Compressor Fridge Replacement: Cut Power Use 80%
Ac Refrigeration Medium 4-6 hours 105 👍

RV 3-Way to 12V Compressor Fridge Replacement: Cut Power Use 80%

Three weeks into owning this RV and the previous owner left me with a power-hungry Norcold 3-way absorption fridge that's absolutely demolishing my 600AH battery bank daily.

I keep hearing people rave about switching to 12V compressor fridges like the Dometic DMC4101, claiming they'll solve all my power woes. But here's the thing - everyone says "it uses way less power" but nobody gives me actual numbers! I need the cold hard facts: exactly how much power will I save making this switch? Will it really make that big of a difference, or am I just trading one expensive problem for another?

Please tell me someone has real-world experience with the power consumption difference between these fridge types! …more

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MagnaSine MS2012 Inverter Replacement Guide - Best Upgrade Options 202
Solar Batteries Hard 4-6 hours 104 👍

MagnaSine MS2012 Inverter Replacement Guide - Best Upgrade Options 202

About my 2007 Fleetwood Bounder: the MagnaSine MS2012 manual claims it should handle my loads perfectly, but this inverter keeps failing on me anyway. It's been acting up for months now - the microwave keeps causing it to hiccup and shut off, then it comes right back on. I know it's only going to get worse from here.

I've been looking at upgrading to something more reliable, maybe a Victron or another brand, but I'm honestly overwhelmed by all the options out there. What are the best replacement inverters that other RVers have had success with? I just want something that's going to work consistently without all these random shutdowns.

Before I spend a bunch of money though, could this actually be a battery issue instead of the inverter itself? I'd hate to replace a perfectly good unit if the real problem is somewhere else in the system. …more
How to Protect Your RV Alternator When Charging Lithium Batteries: DC-
Electrical Medium 2-4 hours 104 👍

How to Protect Your RV Alternator When Charging Lithium Batteries: DC-

Tried everything my neighbor did to charge his LiFePO4 batteries but mine keeps frying the alternator while his works flawlessly — what's different? I want to install a temperature sensing device that can interrupt charging by opening the solenoid between chassis and house charging systems if the alternator gets too hot. I'm looking to spec out components and understand the installation process, and I'm open to hearing why this might not be a good approach. My goal is preventing alternator overheating when these lithium batteries draw high current compared to my old flooded or AGM batteries. I'm looking for technical feedback and am totally open to critique. …more
RV Solar Panel Z Bracket Installation: Drill vs Adhesive Mounting Guide
Solar Batteries Medium 2-3 hours 99 👍

RV Solar Panel Z Bracket Installation: Drill vs Adhesive Mounting Guide

Ready to mount solar panels on the roof but torn between drilling through the fiberglass with Z-brackets or using VHB tape adhesive mounts. Terrified of roof leaks from drill holes but also worried the adhesive won't hold at highway speeds. Which mounting method actually holds up long term? …more
RV Lithium Battery Not Charging: Complete BMS Reset & Troubleshooting
Solar Batteries Medium 45 minutes 99 👍

RV Lithium Battery Not Charging: Complete BMS Reset & Troubleshooting

According to the manual my RV lithium battery should charge normally after BMS protection kicks in, but mine's been sitting completely dead for hours. My Battle Born battery is showing 20% charge, but it's not taking any power when I plug into shore power or when my solar panels should be charging it.

I've been reading about BMS protection modes but I'm not really sure what that means or how to deal with it. Is there a way to reset the BMS system? I'm a bit out of my depth here and would really appreciate some guidance on troubleshooting this before I have to call for expensive repairs. …more
RV Battery Disconnect Switch Guide: When to Use, What Loses Power & Staying Safe
Electrical Easy 10 min read 98 👍

RV Battery Disconnect Switch Guide: When to Use, What Loses Power & Staying Safe

Wondering if I can skip the $400 shop diagnosis for my electrical issues and just figure out this battery disconnect switch myself, even though I'm getting conflicting advice.

Specifically, I'm concerned about what happens to things like my LP gas detector, carbon monoxide alarm, and refrigerator when I disconnect the battery. Will I lose all my radio presets and clock settings? Are there certain situations where I absolutely shouldn't use the disconnect switch?

I want to use it for storage to prevent battery drain, but I'm also wondering about daily use scenarios. What are the best practices to avoid any problems or safety issues? I really don't want to mess anything up or put my family at risk. …more
Complete RV Solar System Guide 2024: Sizing, Installation & Wiring
Solar Batteries Medium 4-8 hours 97 👍

Complete RV Solar System Guide 2024: Sizing, Installation & Wiring

Turned to YouTube for RV solar advice and now I'm more confused than ever - probably a dumb question, but how do I actually size this thing? Could fellow RV owners share details about their current solar setups?

Please provide insights on:
- Total system watts
- Fixed or portable panels
- Rigid or flexible panel types
- Series or parallel wiring configuration
- Total system amps
- System voltage
- Wire gauge used
- Controller type
- Personal pros and cons of your current setup
- What you might change in a future installation

These details will help establish baseline specifications for a fleet installation project. …more
RV Solar Panels Not Charging Battery: Low Amp Troubleshooting Guide
Solar Batteries Medium 45 minutes 97 👍

RV Solar Panels Not Charging Battery: Low Amp Troubleshooting Guide

Installed 400 watts of solar panels on the roof last month but my battery monitor barely shows 2 amps coming in even at peak sun. Wiring looks solid, connections are tight, and the panels tested fine individually. Something between the panels and the battery bank is killing my charge rate. …more

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Motorhome vs Toy Hauler Electrical Systems: Complete Comparison Guide
Electrical Easy 10 min read 92 👍

Motorhome vs Toy Hauler Electrical Systems: Complete Comparison Guide

Walked into three dealerships with my $40k budget and they're all pushing different electrical setups — can't afford to buy wrong between motorhome vs toy hauler power systems. Currently I have a 2020 F350 diesel SRW with a Reflection 29rs toy hauler, and I'm comparing a Grand Design Lineage 31ZW Super C motorhome versus a Momentum 381MS toy hauler.

The toy hauler I'm considering comes with serious electrical upgrades - 2 heated 400Ah lithium batteries with internal BMS, dual 3,000kVA inverters, four 300W bifacial solar panels, dual 50A solar controllers, and 60A DC-DC truck charging. Currently, to transport my side-by-side (SxS), I need two trucks and two trailers, which is inefficient.

I'm weighing pros and cons like overall length (truck and toy hauler would be about 60', MH and 20' cargo trailer would be about 57'), maintenance costs of keeping two diesel trucks, and transportation flexibility. I also have an F150 that could potentially serve as a toad vehicle.

What experiences can others share about transitioning between these RV types, especially considering power management and transportation logistics? …more
RV Chassis Battery Draining & Dead Outlets - Troubleshooting
Electrical Medium 2-4 hours 91 👍

RV Chassis Battery Draining & Dead Outlets - Troubleshooting

Finally followed the manual's advice to check the converter first when my outlets died, but my RV chassis battery keeps draining even though the converter tests perfectly. here and I'm at my wit's end with my 2018 Winnebago Vista. The chassis battery keeps going completely dead every few days, even when we're plugged into shore power at the campground. I've already replaced the battery twice thinking it was just old, checked all the obvious stuff like dome lights and radio, and even had the alternator tested - everything checks out fine.

What's really driving me crazy is that this just started happening about a month ago out of nowhere. We've been full-timing for three years without any major electrical issues. I'm wondering if there's some parasitic draw I'm missing or if the battery isolator could be acting up? Has anyone else dealt with this nightmare? I'm getting tired of jump-starting this thing every other day and my wife is about ready to sell the rig and get a travel trailer instead! …more
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