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  • Victron and EG4 12v Houseboat System

    Here's my Houseboat Solar Configuration. It's powered by 1000w of solar (and a supplementary 5500 Onan generator to supplement, if needed). No shore power, the houseboat is on a mooring ball full time. The batteries are 3x 12v EG4 400ah wired in Parallel. Not show here is the Victron GX Touch...
  • Should I override Victron's LiFePo4 charge preset? (EG4)

    Victron's default LiFePo4 charge preset is different from what EG4 recommends. Which one should I use? EG4 recommends: Absorption: 14.1 Float: 14.1 Victron preset: Absorption: 14.20 Float 13.50
  • Connecting 5 12v batteries in parallel

    I’m looking at installing 4-5 BigBattery 12v 170ah batteries in parallel on a houseboat. The data sheet states you can connect up to 8, but to ensure they stay within 1 volt of each other. I hear a lot of conflicting things about connecting more than 2-3 batteries in parallel. Any advice? Is...
  • Victron Multiplus II: How to Fuse Parallel DC cable to Battery

    I am using a Lynx Distribution Module to connect my MultiPlus II 12/3000 Inverter/Charger to the Battery Bank. It's a 12v Inverter, so it calls for a 400amp fuse, and dual 2/0 cables to keep flexibility manageable. I'm not sure the proper way to fuse the dual connections. In my diagram, I...
  • EG4 to Victron Cerbo over RS485?

    I have a V2 EG4 12v 400ah battery. The manual and front panel show RS485 ports on the front. Can I connect that to the Cerbo GX to get Battery monitor information into my VRM? Battery: https://eg4electronics.com/categories/batteries/eg4-lifepower4-12v-400ah-lithium-iron-phosphate-battery All...
  • EG4 says to storage batteries at 100%

    In the EG4 48v manual, it states to store the batteries at 100%. I’m generally conflicted on what the right voltage is for LiFePo4 cells. 1. My Victron Smart charger goes into “Storage Mode” which puts the cells at around 3.4v each. The SOC on the battery still shows 100%. 2. Others say to...
  • EG4 battery keeps going into COV Protection mode

    I have a 12v EG4 400ah rack battery that keeps going into COV Protection mode. I have 2 other EG4’s with no problem. They are wired in parallel. It seems to happen when I charge them to 100%. It triggers around 13.7 volts I’m not even sure what this mode means. And it seems suspicious that...
  • Can my system support Lithium Batteries?

    I recently bought a houseboat with Solar, and this is my first solar system. I need to replace the current batteries. They are 6 Trojan L16HAC (6v) batteries wired in 36v series. I am thinking about going to 4 Lithium 36v 67ah batteries wired in parallel, so I can cut weight, and reduce trips...
  • Houseboat Solar Plan Feedback

    Hello! I'm looking for critique of my Solar Plan, for my Houseboat. See the attached diagram. This is my first solar system, so I was hoping to get some feedback on my plan. I left the communications out of the diagram to de-clutter it, but I want everything to connect to the Cerbo GX. The...
  • Maximum amp hours for a charger?

    The Victron IP22 30amp Smart charger says it supports batteries 100-300ah. My battery is 400ah. Can somebody explain why a charger has maximum ah? Would it work with my 400, and just take longer to charge?

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