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Itinerant1

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  1. Your bms is the last line of protection, your charging sources are the first line of protection and be set to stop charging or lower voltage which ever way you go. If your battery bms fails it should shut your system down.
  2. maggie have done an energy audit that mptjelgin suggested? That will give you an idea what you use in a day that will need to be replenished. I'm sure there are many out there and if you haven't here is just an example that could help you. https://www.rvsolarelectric.com/index.php?route=directory/directory&directory_id=3 All of us giving you the size of our system we have really doesn't mean much till you know what you use. We fulltime and going on 840+ of continuous days boondocking and 200 days before this with 1,280w (flat mounted) and 500ah lfp live like being plugged into a power pole. Nightly use 150-200ah. Run a 2,000w generator for a hold over charge for 2 hours less than a dozen times in a given year. After the first few days of boondocking it's like groundhog day over and over again.
  3. The cells (prismatic, pouch, cylinder) come from China from various companies then they are assembled here in America and made into a "drop in" style battery by various companies like Battleborn or others with their name on the case. You just don't know who actually manufactured the cells though.
  4. Yes, there is actually more. Magnum has programability along with the Magnum PV solar charge controller. Which follows the inverter/charger programming. First level of protection is the Magnum inverter/ charger which is set for low voltage at 12.0v to shut down . PV charging has been set at 14.1 bulk (CC), 14.2 absorb (CV)(10 minute is minimum, can't be turned off), float 13.6 (CV). If anything happens that would cause conditions beyond programmed limits the BMS will disconnect the charge source or loads.**Over voltage (highest cell is over 3.8V after a 3 second delay)** Under voltage (lowest cell is below 2.8V after a 30 second delay)** Over current (current exceeds 10C for 10 seconds)**Over temperature (highest cell exceeds 150°F or 65°C)**Under temperature (lowest cell is below 32°F or 0°C, charging is not allowed)**Ground fault (There is a high voltage leakage greater than 2mA to the chassis pin)**Unmanaged cells (The programmed number of cells does not equal the number of cells read)
  5. The reason being is folks get confused with the chemistries or the read a post from somewhere or watched a video on youboob then post it like the gospel which the original poster was confused. Lifepo4 or LFP is fantastic. I say as someone who is living off of it as a fulltime rver having it installed 30+ months ago, having boondocked all of it but 50 days and in a stretch of 686 days continous boondocking now traveling around in a 5th wheel. 1,280w solar being the main source for charging 500ah, if needed I'll use a Honda eu2000i generator for a hold over charge, used a dozen times in this period for 1-2 hours each. Daily use from sundown to sun up is 125-150 ah using a Magnum 3000w hybrid inverter. The system has not been turned off since day 1 with all the conveniences of home just as if being plugged in.
  6. We're talking about Lifepo4 chemistry not one of the other chemistries. This is what you would be purchasing if using a drop in or buying prismatic to build your own. If you're thinking of the salvaged batteries from electric vehicles different chemistry. Thermal run away is a major concern as was posted and shown on the forum awhile ago with a gentleman's golf cart lipo batteries starting on fire and catching his 5th wheel on fire while just sitting there. Not GBS battery but same safety style vent from 2012. Lifepo4 prismatic cell which was shorted to cause a fire 3:06 video.... slowly buldging, lots of venting at 2:30 casing finally explodes but no fire. https://youtu.be/p21iZVFHEZk
  7. He's talking about UL rating and testing but it's not like they're the only that has it or it's something new. As a user of 500ah Elite GBS LFP for 30 months now. From Elite Power Solutions... "With Phosphate based chemistry and patented safety valve design, our Lithium Ion battery cells demonstrate the highest safety performance in the industry. The safety valves can pop open under abuse conditions, quickly release internal cell pressure, and thus prevent cells from catching fire. Tests have been conducted to confirm cells do not catch fire or explode in various abusive conditions, such as nail penetration, short circuiting, over-charging, over-discharging, over-temperature, crushing, dropping, etc. Our Lithium Ion batteries are certified with UL1642 and UL1973 standards." Cute video but not really informative as real life experience.
  8. I've been boondocking for over a year now travelling with no hookups living off of solar, dumping tanks every couple tanks, refilling water. A 30# tank lasts us 15-17 days running the hot water tank, fridge (Norcold 821), misc cooking on the stove/ oven. In summer with more sun hours we're able to switch over to electric and use solar for the fridge 6-12 hours then the 30# would last 19-21 days. 15 days would be a safe bet.
  9. $486.00 @ emarine. Only time will tell if they're as good as they claim. Our lithiums where/ are the same for questionable longevity.
  10. Out of all the forum boards I research on I think the Airstream probably has the most info about the easy start. http://www.airforums.com/forums/f37/easystart-install-in-one-image-165115.html There are more threads specific to the start kit. Cost a couple of dollars but appears to really drop the draw on the batteries.
  11. Star light install I wanted a working system and I'm sure not seasoned enough to install myself. Yes, sorry for the hi jack back to the original thread.
  12. I like looking at other system myself and having 500AH (400 usable) GBS LFMP batteries, 1280 watt solar. Taking up little room, under the light and right is everything with the Me Arc 50 and display in the trailer.
  13. Just finished watching all of the 10 videos (fast forwarding through some) very impressive. That's quite the system but did use alot of basement area. I'm sure in a toyhauler the garage will carry your extras instead.
  14. We had Starlight put our 1,280 watt solar, 500ah GBS Lithium Ion system in last year and they did a great job. The system has performed flawlessly so far and has not been powered off since the installation.
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