diy solar

diy solar

Most reacted posts

  • Post in thread: Salvage/permanent disconnection from grid

    Going completely off grid when the grid is right there seems short sighted. You never know what life is going to throw your way. Just think of it as an insurance payment, hopefully you won't have to use it but you'll be glad if you ever need to.
  • Post in thread: DC-DC charger (B2B) options and general discussion

    Sterling rates their chargers by their input current for what it's worth. For example I have their 12v-12v 30A model and it outputs about 22.5A. It's good because you know what the maximum draw on your alternator will be but counterintuitive as most other chargers of any type are rated by...
  • Post in thread: Aliexpress sellers, big liers. What do you consider a "decent" voltage difference between Grade B cells?

    I'm not interested in calling you a racist but I would like to inform you that saying things like 'Chinese people don't hold western values' is the kind of language historically used by white supremacists. Something to consider when posting online. Consumer protections exist because of laws...
  • Post in thread: 100w panel discussion and my future system. Advice needed

    I would strongly recommend considering ~400w panels. Probably should be able to find them locally and the cost will be much less than 16x100w panels.
  • Post in thread: Redundant Circuit Breaker?

    It should go battery---fuse---positive bus, then everything connected to the bus should have its own fuse or breaker.
  • Post in thread: Experiences charging LFP from alternator WITHOUT a DC-DC charger

    This is not a coward's thread.
  • Post in thread: DC-DC charger (B2B) options and general discussion

    Alternators supply the amount of current being drawn by loads, the "extra" current would go to those loads not the charger. You can have a few LED lights connected to a large battery bank and they don't burn up even though the battery bank can supply enough current to burn them up because they...
  • Post in thread: New NEC code makes it impossible for DIY systems to be compliant

    Regulations and building codes protect people living in buildings. Construction contractors have every incentive to cut corners since the goal of capitalism is to maximize profit.
  • Post in thread: New NEC code makes it impossible for DIY systems to be compliant

    The USPS doesn't receive any appropriations from congress, all of its revenue comes from postage, fees, and other services.
  • Post in thread: DC-DC charger (B2B) options and general discussion

    The alternator should supply only the current the b2b is drawing, not all the current that the alternator could possibly supply.
  • Post in thread: Charge Profile Settings - What do you run?

    I just use the electricity my system provides and don't worry about it too much since everything seems to he working fine without any fuss. It took me thirty seconds to setup my controller and Battleborn says you can use all 100% of their batteries. I only recently added the second battery and...
  • Post in thread: DC-DC charger (B2B) options and general discussion

    2. The Renogy dual input charger when the engine is running will allow for a maximum of 25A from both inputs, even if you are only getting a few amps from the solar. A switch to disconnect the solar panels is recommended so you can prioritize alternator charging when you need it on cloudy days...
  • Post in thread: New years resolutions: loosing weight in RV 190AH lead replaced with 100AH LFP. -100lbs 47kg

    I can report that I had one of those MRBF fuses successfully blow the other day, 12v 2 x100ah battleborns. Though it wasn't from a short circuit, if that's relevant.
  • Post in thread: Is it practical for me to live off grid with no electricity and with that internet?

    When you get sick and go to the doctor are you going to tell them not use any electricity when they treat you? You're going to spend all your time like the guy on the Led Zeppelin cover, wandering around with a bundle of sticks on your back. With only a couple acres of land you might have a...
  • Post in thread: ecoflow river max

    If you are using the ecoflow in the same place as your DIY solar system then using a dc-dc converter to charge the ecoflow from the DIY system would work, or even an AC-DC charger. You'll lose some watts to conversion but it's probably the simplest solution.
  • Post in thread: 24V dc-dc charger

    I've never heard of a Promaster having a 24 volt battery before. Have you verified this by testing the battery voltage with a multimeter?
  • Post in thread: 12v or 24v ?

    No, a watt is a rate, it tells you how much power is being delivered at any point in time. One watt corresponds to one Joule per second. Saying you used a watt would be like saying you used a mile per hour. A watt hour is an expression of how much energy is stored or used. A 10 watt hour...
  • Post in thread: Underground water line insulation

    It took me about 5 minutes you to realize that you aren't going to be burying the water lines 8 feet below grade.
  • Post in thread: DJI drone charging

    For your application I think you might want to consider a separate components for dc-dc and mppt since that unit is limited to 50A output. The wiring is simple and those components don't take up much space. It'll take a lot of juice to keep a 400ah battery charged. I would recommend figuring...
  • Post in thread: 12v or 24v ?

    Everyone understood that what you meant was you would use 800 watt hours a day. Then we tried to make sure you understood that watt and watt hour describe different things, because most people would only continue to use the incorrect term if they didn't understand the difference.
  • Post in thread: Help with Renogy 50 dc-dc mppt!!

    Hard to argue against a good battery monitor, at glance you can tell if everything is working properly or not.
  • Post in thread: 12v or 24v ?

    You should size wire for the maximum current the inverter can draw. I'm not sure where they are getting 4/0 wire from, that's huge for 50A . Most wire size calculators would say 6 or 8 awg for a short run.
  • Post in thread: System designers.

    Light Harvest Solar in Portland specializes in small off grid applications. I've purchased things through them, I live near Portland but they ship, they were super helpful.
  • Post in thread: Charge Profile Settings - What do you run?

    I'm certainly not an expert but my charge controller has a lithium charge profile that is simply Bulk - 14.4v. Seems to be working fine with my two 100ah Battleborns.
  • Post in thread: Would you charge 12v LiFePo4s with these chargers?

    Yes if you wanted to test it turn it on with the leads not attached and check the voltage. You would expect the LiFePO4 profile to just be a constant voltage so it should read somewhere around 14.4v. The results might be inconclusive if the charger does have some kind of complicated profile...
  • Post in thread: Battleborn vs. Lifeblue

    Battleborn offers an 8 year full warranty and 10 year limited warranty.
  • Post in thread: Fuses keep blowing on install?

    Are you certain you have the polarity correct for the fan? Have you tried other loads?
  • Post in thread: New here. What a fantastic source of info. A battery question if I may.

    Most people would connect the inverter to Lynx bus bar. If you are running any kind of load while charging some of, and as much as all of the power being delivered by the charger will be used to power the load. Nothing you can do about that and and it's not like you earn interest on it if you...
  • Post in thread: Turning certain loads on off idle?

    Yeah, it just seems like a really bad idea not address to the root cause. Eventually you're going to have to anyway.
  • Post in thread: Two Battleborn or one 24V LiFePO4 Powerwall

    Spot welding is the recommended practice since the heat from soldering will damage the cells.
Back
Top