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Daveh

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Everything posted by Daveh

  1. Looks nice Did you have that powder coated?
  2. I am thinking of buying a basic and smaller hitch cargo carrier and modifying that. I may wait until this summer as there is a welder that does some work for our park and I may hire him to design something more specific. I did think a carrier would be a good starting point but maybe he would rather do it from scratch. My other option is the front generator area. I am concerned about airflow though? I know I would need to have it open unless I put some type of grate over it. The other thing I was considering was putting a hole in the bottom of the generator area so when we were stopped I could lower the unit with linear actuators. I am worried though that the copper tubing and stuff will not allow this movement and create a leak?
  3. Glenn where have you installed the outdoor unit portion?
  4. Still A LOT. I am thinking of pulling my ac unit (Such junk). Interested in how your project goes.
  5. When I first got my Calb LifePo4 cells about 6 years ago I had them all hooked up on a table where I was balancing them and testing them. Dropped the wrench. Holy S***. I happened to have a piece of wood nearby so I could very quickly knock the wrench away, but what a display. Really scared me. Whenever I mess with my batteries now it feels like a diffuse the bomb scene from Mission Impossible. Thank goodness my wife did not see it. I never said a word. The cell survived.
  6. Well then he is quite far along. So then he would have 1 pack and he could use a single shunt-----probably the BLK. That is much simpler. I got thrown off with the three pack talk.
  7. Yes the terminology is getting confusing. I would call your set up 1 pack made up of three packs in parallel. If the three packs are connected they should be in voltage balance. You probably still want to separately monitor the voltage on each 48 volt "component" battery but I would think you could do that rather inexpensively without the need for a separate shunt etc. Just use one shunt.
  8. Why are you keeping the as separate packs? Can't you just parallel wire them into one pack.
  9. Doesn't look like that is an option for 48 volt packs. https://forum.solar-electric.com/discussion/353276/battery-combiner-for-2-mixed-48v-banks I would just want to know exactly what was going on in each pack. You could rely on the BMS but won't your low voltage cutoff be lower than what you normally would want to run your batteries down too. That is where the victron and magnum shunt monitors are nice because they will alarm the pack at a voltage above your low voltage cutoff based on amps used.
  10. Depending on your setup there may be a place for something like this in your system. https://www.magnum-dimensions.com/smart-battery-combiner. My concern is that your packs will get out of balance.
  11. So you will have three 48 volt packs each with a separate charging source?
  12. Yes, I was going to comment on this also Glenn. Did I understand right you have three packs? If you have three separate packs then you need to monitor each pack. I think you could do a shunt on negative each pack and then a shunt on the main negative for a total reading. This is where it could make a huge difference what brand monitor you go with as some can communicate with each other and some not.
  13. I have a down converter from Victron that I am yet to install. I have the same concern. Not specifically on the breaker but that the terminals are not really large enough to accept my calculated needed wire gauge. I am going to run larger gauge and then just make adjustment to smaller size right at the terminal.
  14. https://www.bluesea.com/support/articles/Circuit_Protection/1437/Part_1%3A_Choosing_the_Correct_Wire_Size_for_a_DC_Circuit
  15. I cannot comment on the Balmar except that I have heard about it but not read any reviews. I did want to mention though that when looking at these items also look at their secondary functions. Some come with the ability to monitor the voltage on a second pack, they have the ability to set alarms and the ability to control the shutdown of the system under preset conditions. As Jack said the Victron has the bluetooth function so you can program and monitor from a chair rather than fussing with dials. I have been VERY satisfied with the accuracy of the Bogart Trimetric. I do think a learning technology is the next logical step for these monitors. I just don't know whether Balmar has achieved that without hearing more first hand information. I think with the names that have been put forward it is hard to go wrong.
  16. Glenn, the ME-ARTR won't do it alone. You also need the BMK to be able to read amps in--amps out on your Magnum monitor. Other well known brands are the Victron 700 series and the Bogart Trimetric. The benefit of using the BMK with the Magnum monitor is that then you don't need a separate indoor monitor. I went with the Bogart as that is what jack mayers was recommending at the time I put my system together but I now see the advantage of just staying in the Magnum family. The Victron 712 is the latest and greatest in those types of amp measuring monitors. As you probably know with lithium you are really much better off relying on amps used rather than voltage as voltage is not a reliable indicator with lithium due to the flatness of their discharge curve.
  17. Unless they have changed their manual--one fuse
  18. Yes, I think everyone understood John. The question is whether he wants to go from his 48 V to converters To his load OR go from 48 V pack to small 12 volt pack to load. The idea being that the 12 volt pack could better handle any draw surge(I am thinking small lithium pack) and be less at the mercy of any malfunction in the 8 to 12 converters. There is no magic either way. Just a design question.
  19. I was referring to Victron line of 24 to 12 volt dc to dc converters. Forgot you were using 48. They are not chargers but can be used as a charger to charge a 12 volt pack from a 24. This is a 48 https://www.invertersupply.com/index.php?main_page=product_info&products_id=185548&gclid=Cj0KCQiAq97uBRCwARIsADTziyZiZIbbIKXI7gTH0gv4aZ6xiMWXEqvejggGhEbwkTrCujdYfQkdrnQaAtekEALw_wcB
  20. I also think you are making a mistake here Glenn. Don't put unknown components in the middle of a very nice system. \
  21. Glenn look at the Orion ones by Victron. More expensive but not horrible.
  22. Yeah. They are pretty and convenient but are they THAT pretty and convenient.
  23. Aluminum has very good conductivity but less conductivity. You will find voltage loss charts for both copper and aluminum. Copper loses less voltage. It may not matter for you, but just look at the numbers and be aware. Also when you join aluminum and copper wires together it causes a chemical reaction and deterioration over time so use ox guard or similar product on any union.
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