diy solar

diy solar

Recent content by J.P.

  1. J

    Problem with JBD BMS Heat function on

    I only have a 20W heater in this battery. 20W @ 12V = 1.67A. The charger is 2 Amps. I have done several tests and the way it works is, if the battery is (less than full) and actively charging when the temp goes below the low set point, the BMS will shut off the charging port and redirect that...
  2. J

    Problem with JBD BMS Heat function on

    Yes, but if the battery is full, (even though a charging source is connected), there is no power flowing into the battery (because it's full) and therefore the heaters are not activated. Poor design in my opinion.
  3. J

    Problem with JBD BMS Heat function on

    You are probably right. Once there is no current flow, there is noting for the BMS top sense. I will test it anyway. The best answer if for JBD to redesign that function and give us more control options in the App.
  4. J

    Problem with JBD BMS Heat function on

    In a previous battery of this type that I built for my Generac Standby Generator, I used a KSD Bimetal Thermostat (NO 5C) that has worked OK but I was hoping the new HEAT function on the BMS would work better.
  5. J

    Problem with JBD BMS Heat function on

    I guess there is a lot of back story that would help define the issue and my goal. I am in South Central Texas so we do not have freezing temps all that often. I also have fabricated 12V batteries for my vehicles using Headway 38120HP Cells with custom 3D printed cases. The way I understood...
  6. J

    Problem with JBD BMS Heat function on

    OK. When the battery is full, and the smart charger is in sleep mode, and the temperature drops below the setpoint, the heaters will not kick on because the BMS does not sense that it's hooked up to a charger. The heat mode only works when it has charging current. It seems that it has to...
  7. J

    Problem with JBD BMS Heat function on

    You did not read the entire post. I understand that it is working as (poorly) designed. It does not work with a full battery hooked up to a smart charger that has gone into sleep mode. Any ideas how to make it work other than a non-smart trickle charger?
  8. J

    Problem with JBD BMS Heat function on

    I have several JBD BMS with the HEAT function that are not working... at least not in the way I need them to work. I have discovered (by trial and error) that the heating function only works if the battery is connected to an active charger. The best I can tell, if it's connected to an active...
  9. J

    JBD 4S 200A BMS - heater function?

    First of all, the heating function only works if the battery is connected to an active charger. The best I can tell, if it's connected to an active charger, when the BMS senses the temperature has reached your "Charge under temp Trigger Value" setting, it simultaneously turns off the Charging...
  10. J

    EG4 Chargeverter | 48v 100A Battery Charger - Question

    I just tried out my new Chargeveter last night and it's not working as expected. I hooked everything up, started the generator, went to the Chargeverter and saw that the screen was powered up and it was reading the Battery voltage correctly at 50.4 V. I went into the Settings screen and set it...
  11. J

    Texas Solar Charges - Brazos bankruptcy causing me to be charged

    Anyone from Texas should understand this phrase. Tell them to "COME AND TAKE IT!"
  12. J

    Benefits of Firmware Update for Growatt 12k DVM MPV

    I actually got a response back from Growatt Technical Support indicating that they were going to look into solving the problem. Time will tell.
  13. J

    Benefits of Firmware Update for Growatt 12k DVM MPV

    Just a note to report that my unit is not charging again today. No reason that I can tell. I logged into the Settings via the Growatt Dashboard and changed the "Charging Constant Voltage Point" setting by 0.1 Volt and saved the setting and a few minutes later the Dashboard now reports that the...
  14. J

    Benefits of Firmware Update for Growatt 12k DVM MPV

    The Firmware update package you are requesting (and an outline of how to successfully install it) is in this post. https://diysolarforum.com/threads/growatt-12k-latest-firmware.53805/page-3#post-817434 Unfortunately, it did not correct the problem of the solar randomly not showing up. Less...
  15. J

    i might of stumbled across a cheap way to add heat to your diy battery's

    Heating pads come in lots of shapes and sizes and I find it useful to use low wattage ones to make sure they do not get too hot. Here are a few examples. https://www.amazon.com/gp/product/B0BLW7BTH1/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1...
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