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  1. BarkingSpider

    Safe and quick method to lower voltage on LifePO4 cells when balancing.

    While balancing or just in general use, I sometimes want to lower the voltage on a particular cell in my battery bank quickly and safely. After trying numerous methods, I found this approach to be quick and easy and it does not require any special equipment or tools. I used the household...
  2. BarkingSpider

    Whats the difference between MPP inverters ECO mode and Bypass mode?

    According to the manual, Eco and Bypass modes are identical. Any idea what the differences are? I have 2 x MPP LV—MK 3048 systems in a split phase config. Manual is here
  3. BarkingSpider

    DIY spot welder - easy project - make your own battery packs

    I just completed mine based on a similar system by a guy in the UK. Works great. Handles .15mm zinc no problem. I used this for the pen and switch ($22) This for a secondary switch that I prefer. ($7) This relay ($13) A small old 300a AGM battery from my...
  4. BarkingSpider

    New Chargery BMS16P review (just released Dec-2020)

    Jason at Chargery just shipped me one of the new 16P BMS units. The big changes are: 1amp Balancing (now the control unit is black (slightly larger) and has a fan inside Screen showing Internal resistance of the cells Balancing action is shown on the main screen using a yellow bar icon. More...
  5. BarkingSpider

    Monitoring MPP/Clone systems with freeware Pi/Grafana

    I’ve been using Pi Zero micro computers to monitor all kinds of equipment over the years as they are low cost and incredibly flexible. Here is what I have just added to monitor my MPP 3048 pair 240v split phase system with BYD LifePO4 cells. Let me know if you are interested. Its all freeware...
  6. BarkingSpider

    BYD packs — one year on — survey

    HI, Im calling out to anyone that purchased the original 24v BYD packs. I bought 4 early this year (2020) and they seem to be holding up ok. They are definitely not the bargain they were when they first came out, as I can now buy way more new IifePo4 storage in 280ah cells from China, including...
  7. BarkingSpider

    Cell label - -how do I read it?

    Any idea how I read this label on my new 280ah cells? Is it a standard QR code? Its too small to read with my phone. All I can get is the time and date, is there any more info?
  8. BarkingSpider

    MPP 3048 LV MK - split phase - first review - 2020 version

    Hi, Just received my new MPP 3048 LV MK combo pair from MPP Taiwan. I bought them on Ebay They took a few weeks to arrive...
  9. BarkingSpider

    MPP 3048 advice

    Does anyone have any experience with these newer MPP units? Are they much different from the older 2024 and 5048 Chargers? Joe.
  10. BarkingSpider

    Howto: automatically start backup generator to recharge solar battery.

    I live off-grid. I wanted to have a gas/propane generator backup for my battery/solar bank for when there is bad weather or I have some other problems with my electrical supply. It needed to be a powerful generator that I could use to quickly recharge my LifePO4 bank in under a few hours and...
  11. BarkingSpider

    Wanted: high wattage 240v AC to 24v DC charger for my powerwall

    Hey, has anyone found a good solution for quickly charging a 20kw powerwall from the grid or more likely a 240v split phase generator? I want to recharge my IifeP04 powerwall in as little time as possible, hopefully around 2 hours. My generator can put out 9kw. I've found a few MeanWell 1Kw DC...
  12. BarkingSpider

    AC and DC digital meters with ModBus interface - works with Pi Zeros

    I found this DC tool after using their AC version from a Chinese electronics company, works great. Allows you to save data from your battery/solar system to a database and graph it, set alerts, remote monitoring etc. Its well made and comes with everything you need to plug into your Pi or PC...
  13. BarkingSpider

    SunGoldPower 24v 6000W 240v split phase inverter charger

    I just received this for my offgrid home project 24V 6000W inverter charger - $1099 + tax. Very heavy and well built. Initially looked very good, then some problems arose. Just turning on the unit and having it idle...
  14. BarkingSpider

    Off-grid Solar / Battery monitoring and control freeware

    Im building a freeware realtime software/hardware monitoring solution that provides intimate details and decision making information about a solar system. I intend to be fully off grid in the near future and want to be self sufficient for power. My goal is complete control over every aspect of...
  15. BarkingSpider

    Epever 40a & 24v BYD LifePo4 settings

    Does anyone have a good set of values to use with my Epever 40a Triron and a 24v 3.5kw BYD LifePo4 battery? There is about 20 settings in the”User” battery section. Some obvious, some not. There are many connect/disconnect/reconnect values which see to overlap. Thanks ... Joe.
  16. BarkingSpider

    Wanted: 110v LifePo4 charger

    Does anyone know where I can buy a 110/120v charger for my 24v battery bank? 1000W or bigger would be good.
  17. BarkingSpider

    Using 1 solar array with 2 charge controllers

    I have two 4kw battery banks, 1 AGM and 1 LifePo4 that need 2 different charging characteristics. I currently have an existing 2kw solar array 4s4p at 80v to an Epever 40amp controller that is charging my AGM batteries no problem. I want to try to connect my new LifePo4 bank to the same solar...