diy solar

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  • Post in thread: LFP "UPS" and Load Shifting

    With my Victron Quattros I get a voltage drop when switching from shore to inverter, it's very noticeable with motors like with AC units and dehumidifiers, there's a loud difference. I wouldn't trust it with IT gear. I manage hundreds of IT systems and if you're planning on using an inverter...
  • Post in thread: Cheapest way to just feed 10k solar to grid?

    Newbie to the house side of things and sitting on these 10k of solar panels so might as well tie into grid. My homes electricity co-op has net metering and I don't care about power loss as its super stable and i have an RV and other homes. Energy usage is on average 2500kWh and bill total is...
  • Post in thread: Alternator that produces AC power?

    The problem with windmills is the speed isn't controlled but on an engine the it is. I figured with pulleys I can convert 700rpm to 2500rpm then I'm assuming there's some type of clutch that'll keep it at 2500rpm and ignore the higher speed rpm. Also could use some inverter generator tech so...
  • Post in thread: Simple option for DC-DC charging from tow vehicle?

    Yes as long as both negatives on the Orion are used it'll act the same.
  • Post in thread: Use for excess energy without sending to grid?

    We're not over thinking it, its just simple thermodynamics on insulation efficiency. The problem isn't creating the heat but sustaining those heat losses that you're not accounting for. I hope you do it and I hope it works, I love the idea but please get some data and document your build...
  • Post in thread: My first stab at hybrid grid/solar fifth wheel setup

    No there is only a L1 input 1 (shore) and L1 input 2 (gen). So with 1 inverter you will only get 120v into 1 leg. So when on shore you'll only get 50a or 6000w. If you had the 2x120 MP or 2 inverters you could use all 240v/50a or 12000w from shore. The Quattro is 100a in and out and has 2...
  • Post in thread: Bussbar/circuit panel for medium sized 12v loads?

    My 12v bay was feeling neglected so started on rearranging them. Actually managed to fit 2 air compressors in saving a ton of space in another bay. I ordered a couple 200a mrbf fuses and blocks to connect the batteries to the Lynx. I'm thinking of adding that little breaker for my small...
  • Post in thread: 50 amp Motorcoach System Design

    As long as the quattros are same model and revision they can be programmed into split phase so you can run 220v without any issues. Looks like genny needs a controller for auto start so can be added.
  • Post in thread: Revised stand alone motor home power system

    All looks good to me. 400ah is about 5000w and 500w of solar you should expect around 2000w a day
  • Post in thread: Questions on smart shunt and controllers

    But if you're using the VE smart bt network, shouldn't you be able to to set it to use the shunt's voltage for all the MPPTs? I thought this was the only real point for vesmart. On my cargo trailer I put the smart battery sense on the battery then the mppt 10+ feet away and use the vesmart so...
  • Post in thread: Will Prouse Classic 400w + Alternator AND Shore Power

    12v uses 10x as thick wire than 120v. You can easily swap out a 120 or 240v water heater element for a 12v one or drill a hole and get a bung to add a 2nd element so one is 12v and other is 120v. I once had a welder add water heater elements to a couple kegs and used them on a still to make...
  • Post in thread: DJI drone charging

    I believe they make a battery station case for the Matrice 300 which charges quite a few batteries. I'd get 1 or 2 of those then you can easily transport into the hotel room to charge and when on the road plug it into a cheap inverter that's connected to a LFP battery thats connected to a...
  • Post in thread: What is best way to stress test a system in an RV?

    He has 48v battery it's gotta be disconnected
  • Post in thread: Convert 24v alternator to 12v?

    My coach came with a 50dn alternator and the faceplate is kinda rusted but it clearly stated 270 amps. My understanding is the 50dn comes in 300a 12v or 270a 24v but it was obviously setup for only 12v. I hooked up a wakespeed ws500 and it also shows its 12v (auto selected 12v voltage)...
  • Post in thread: What are good connection point techniques for solid connections

    Picture would be a lot more helpful. 2/0 copper wire at 100a for a few minutes shouldn't really get that warm. 150a+ getting close to maxing the inverter could though
  • Post in thread: Please help me not start a fire.....

    No clue. Also don't get why he'd need a Lynx for the 12v. People always seem to go overboard with switches. I have zero on my coach, my 48v batteries have Breakers builtin so use those and my 12v I just unscrew the lugs or remove the fuses if I need to work on the system.
  • Post in thread: Victron is 10 times as expensive as Voltronic

    I don't get the point of concerning with surge. You'd need to have thicker wiring and breakers just to surge for a few seconds before it what... shuts everything off?
  • Post in thread: Solar something or other

    Don't need controls you just pump water thru it so turn off pump when you don't want it heated
  • Post in thread: 50 amp Motorcoach System Design

    @Rocketman I'm just starting to dig into BMS's but if I have a couple 12v EG4 400ah batteries I want to reconfigure to 48v and replace the BMS, then have it work with my SOK and whole Victron system... would I be able to just use a batrium for both rack batteries or should I get a Separate bms...
  • Post in thread: My first stab at hybrid grid/solar fifth wheel setup

    Not sure why 3 Breakers would all trip unless theyre gfci and there's a ground fault issue. Why do you want charger only? I don't get the purpose of it unless you were only using the inverter as a massive battery charger, which I believe is Victrons use case since they don't sell large chargers
  • Post in thread: EG4 12V voltage drop under load

    Sure but how much is too much? Having 2 of these in parallel should allow 400amps right? Or 200amps or is it just 100amps? And how much voltage should I expect to be dropped? Say I put 100amp load on the batteries that are 12.8v at idle what should the voltage be? It shouldn't be 9v
  • Post in thread: Victron Charge Controller Price Crash

    The nice part of their install is grafana uses vrm data and its api which venusos reports to vrm so you don't need to install grafana locally. Data is logged in venusos then copied over to vrm then copied over to grafanas dB so nothing is lost. If either system goes down it'll just pull the...
  • Post in thread: Bought wrong DC to DC, control it would the cerbo relay?

    Don't need to. I have 6 of these both 24/12 and 24/48. Just use the screw and set the voltage below your max charge voltage and the on/off wire to your ignition. As long as its not your only way to charge you're fine.
  • Post in thread: Use for excess energy without sending to grid?

    I haven't watched the whole video yet just skimmed but it appears they're just talking and not giving scientific numbers or detailed info. Like how they're able to store heat without losses. Like what material they're using for insulation and how effective it is storing that 600c heat for a...
  • Post in thread: My first stab at hybrid grid/solar fifth wheel setup

    Actually I'm wrong. I didn't realize they made a Quattro 2x120 like the MP. This will let you run all 12,000w from shore so you're good there
  • Post in thread: Inverter Bypass Switch

    It's Victron you can rely on it. The problem is with batteries as the inverter needs power to start and run. I've found putting a 12v charger or something would work to get the system online if batteries fail. On my Quattros if any issues I could easily unscrew the lugs and connect the in...
  • Post in thread: Upgrading to lithium/solar on a class c motorhome

    Start looking into a Victron inverter first and build out with their components to see what fits your need best then you can look for cheaper alternatives or features you don't NEED. Going with a Victron MP you'd be able to wire it up so all power in flows through it which means you'd be able...
  • Post in thread: Optimal alternator setup?

    The 2/0 is just going to the DC DC converters so voltage loss isn't an issue it's the concern of heat or something else. It's gotta be in large 3in conduit with other wires. I have like 6 tubes going front to back. I'd like to pump as much power as possible but not sure if it's worth swapping...
  • Post in thread: Feedback Please

    Sweet. The inverter is 70a charger and with 13kwh you're looking at around 8 hours using 1700w of shore. 30A at 80% is only 2880w so you'd get just over 1000w from shore before it starts taking away from charging and taking longer. So if your batteries are dead and you want to just go to a...
  • Post in thread: Parallel Victron 100 amp auto transformers?

    Awesome let us know how it works out
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