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  1. Freep

    EG4 18Kpv Documentation

    Last year when I was looking into AIO systems I settled on the EG4 18Kpv. I remember seeing documentation on the signature solar site that went through all the different installation methods possible with this inverter. I can't find this PDF now and I didn't download it. Do any of you know...
  2. Freep

    EG4 18kpv Questions

    I'm really liking what I see with the EG4 18KPV but I have a few questions. I'm in the middle of an energy audit now and I have a baseline of around 900-1000w of continuous usage before items like HVAC and other appliances factor in. I'm using about 30-40 Kw a day. This will probably go up for...
  3. Freep

    Gathering Data Phase

    I'm in the middle of a geothermal installation at our home and I've been given the green light from my SO to do a residential solar installation since our camper setup is so successful. This is in Wisconsin, USA I've installed Emporia Vue2 on my main circuit breaker to get a good understanding...
  4. Freep

    CATL to mass produce 500 Wh/kg batteries this year

    CATL has announced plans to manufacture batteries with almost twice the capacity of the batteries used by Tesla. This will enable the electrification of aircraft. While this isn't as energy dense as the lithium air batteries which have been developed and achieve 4 times the energy density of...
  5. Freep

    Three panels, three controllers, one battery. Optimum panel placement?

    At our off grid cabin in Canada we have 2 100 AH AGM batteries. They are currently separate, running separate circuits. Because of uneven loads and the solar panel situation I plan to put them in parallel and have all loads on the same circuit. This runs led lights, cell phone chargers, marine...
  6. Freep

    Help dealing with voltage drop

    I'm having trouble finding a DC-DC voltage booster that will go from 12v to 60v. I've searched for days. In our off grid fishing cabin we have a water pump that is 50 feet from the house, which is where the battery is. The pump runs 12v and tops out at 19amps. The line we are installing is 8...
  7. Freep

    Charging a DIY battery from EV charger

    I've been looking for information on how to charge a DIY battery bank(LiFePo4) from a type 2 EV charger and I'm coming up empty. Do any of you have any ideas where I could look to learn about this? The ultimate application is a portable powerwall in my snowmobile trailer for my electric...
  8. Freep

    Electric Snowmobile trailer/charger

    My wife has put a deposit on an electric snowmobile and I'm planning on buying a trailer for it and creating a solar powered/alternator powered charging station in it with it's own battery bank in the trailer. Here's the company. https://taigamotors.ca/snowmobiles/ Anyone have any experience...
  9. Freep

    Solar Forecasting Integration Available in Home Assistant

    I wasn't sure where to post this but for those of you using or thinking about using Home Assistant there is a new integration available for forecasting your solar production. You can see it here
  10. Freep

    Coulomb counter not strictly compatible with LiFePo4?

    I was having a discussion with someone on an RV forum and I pointed out that I like the AiLi meter that Will reviewed and it's fine for me because my BMS can give me SOC from my phone and the Victron Smart Shunt is just too pricey for me for what it does. I got the following response: Is this...
  11. Freep

    Discharge only; Charge only switch

    I'm thinking about building a solar generator but I'd like to build a switch into it that puts it in charge only or discharge only mode. How would I go about doing that?
  12. Freep

    Question about relays

    This is in a Truck Camper I installed a 115 volt SPST relay to cut off the converter when the inverter is turned on. It works but instead of a click of the relay I hear a buzz first. I've turned it on and off several times and have noticed that if I turn it on within a second of turning it off...
  13. Freep

    4s or 2s2p or 2p2s?

    I have 4 identical panels, 150 watt 20.23 Voc, 8.82A Imp. Two panels are mounted on the overhead cab of a truck camper with a slight angle. The other two are mounted horizontally. I have one Victron MPPT 100/30 I was thinking I should go with 2s2p which to my mind(which could be wrong) is 2s...
  14. Freep

    What bad thing happens if I do this?

    This is a camper scenario where an inverter, solar and LFP battery have been added. There are two automatic transfer switches on the AC side of things that keep shore, generator and inverter power separate. However, there is only a circuit breaker that keeps the inverter from powering up the...
  15. Freep

    Infinite Battery?

    I hope I live to see this work https://newatlas.com/energy/nano-diamond-self-charging-batteries-ndb
  16. Freep

    Rewiring a Truck Camper; Advice and Opinions sought

    I've got a truck camper with 2 150 Watt panels 271 ah LFP Victron 100/30 smart solar Victron Orion TR 30 amp I'll be expanding and rewiring the battery compartment, adding an inverter, adding two more panels and potentially moving one or both of the listed chargers to the expanded space...
  17. Freep

    Design a portable battery bank

    I'm really happy with the LiFePo4 bank I built for my TC and now I realize I need a portable battery bank to run laptops and a fan in a tent which is used as an office. It should be fairly light. I should be able to plug it into my truck camper's DC system to charge it.(may require adding ports...
  18. Freep

    High AMP DC-DC charger

    I've got an Orion TR 30 AMP charger but I'm starting to realize that I should have gotten myself a bigger charger since my alternator is a 180 AMP alternator. Any recommendations? Ultimately, I'd like to get rid of the generator in my camper, which only gets occasional use and the most it will...
  19. Freep

    Recommendation for a Relay

    My system is in a slide in truck camper. I've got batteries, chargers and panels working great and I've been contemplating the next phase which is installing an inverter. It dawned on me yesterday that I'm going to have to bypass the converter/charger when I turn the inverter on. I should also...
  20. Freep

    Why is my LiFePo4 pack charging slowly?

    I had an unscheduled full discharge test his morning. Last night we came home from our camping trip and I plugged the camper in, forgetting that I had flipped the AC breakers when I installed the new battery. I left the fridge running on DC. This morning I went to get something out of the...
  21. Freep

    Define "Damage"

    I've read many times and many places that overcharging,over discharging, high temps and low temps will damage your cells. But I can't seem to find an explanation for the kind of damage that happens and what the result is. I imagine that heat damage is not the same as over discharge damage. Can...
  22. Freep

    Going without a BMS for a month. Is this a bad idea?

    I've been putting together a 271ah (4s 12v) battery for the last few days and running into issues with my BMS limiting current when I put a load on it. I'm thinking about just dropping the BMS altogether. I just ordered an overkill BMS that is supposed to arrive on Thursday but we're going to...
  23. Freep

    What BMS is this?

    I suspect this BMS is a Daly but it is not branded. Here is the Daly it looks like. What do you guys think?
  24. Freep

    Testing a charger and cells somewhat unconventionally

    My neighbor just gave me a 30 amp DC power supply and I have a new Victron Orion-tr 12/12 30(non isolated) charger which I will install when I install my 271 ah battery which is arriving tomorrow. I was thinking I could initially wire the cells in series and charge them for a while at 30 amps...
  25. Freep

    DIY Capacity tester

    I don't have a capacity tester, I have 4 271 cells arriving Friday and I don't want to wait another month for a capacity tester to arrive. What I do have is a 400 watt inverter, a Kill a watt and a hair dryer. I also have a hot plate. I could buy a bigger inverter locally if I need to. I can do...
  26. Freep

    BMS recommendation needed

    I'm in the middle of an upgrade of the electrical system in my truck camper. I've replaced the single 90W panel and PWM controller with two 150W panels, a Victron Smart MPPT controller and a Victron smart battery sense. I have a Victron DC/DC smart charge controller which I haven't installed yet...
  27. Freep

    What do isolated and non isolated mean with respect to DC/DC chargers?

    I'm preparing to swap out my AGMs for LifePo4s and Updating all the sources for charging my batteries. I've upgraded my panels and added a Victron MPPT that supports LifePo4. I'm upgrading the Progressive Dynamics 4045 Might Mini so it will support LifePo4. Then I started wondering about how the...
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