diy solar

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  • Off Grid house Solar system plan... how does this sound?

    Ok. So I am planning out my solar system... So far I have the following: - MPP Solar LVX6048 (6.6 kw low frequency inverter, with 125a MPPT and plugin charger, 120v/240v) - 40x Santan Solar 250w poly panels -EP Ever 60a MPPT (actually have 3 of these) - 16x 280 ah Eve Cells - 16x 304 ah...
  • outback gvfx3524 inverter charger value?

    Recently acquired an outback gvfx3524 I was selling my brand new MPP solar LVX 6048 The gentleman didn't quite have enough money but he did have this outback GVFX 3524.. It's a 3,500 watt, 24 volt inverter/charger And more importantly it works But I'm just not quite sure what it's...
  • Recently updated to LIFEpo4, BUT now random shut off on inverter

    So I just took out my FLA and installed a pair of LIFEpo4 batteries(see signature) I ran them yesterday, with no issues. however there was barely any solar, grey day However today I am getting plenty of solar input... I am finding that there is almost like a surge, the fan speed on my RV...
  • Question about cooling solar gear...

    I am planning to convert my shed to be a solar gear shed... I plan to cool it in the summer... its will be well insulated and the roof is covered in panels(lowering the heat load on the shed itself) there will be inverters, MPPT SCCs, Lifepo4 cells, BMSs, etc... what could be a good target...
  • Lv6548 x4 in split phase

    I'm not sure if I found the correct configuration I have four LV6548s I would like to configure them split phase 240 volt... It should be a little over 100 amps I think I found the correct configuration in the manual
  • EpEver 4210an how to change charge settings?

    So I'm trying to change the settings from FLA to lifepo4 However I'm running into some problems it doesn't seem that there is a way to manipulate the user specified settings... Can this not be done without the mt50? It looked like there was enough controls on the face to be able to do things...
  • Different size Lifepo4 battery banks in parallel

    So I've been thinking about this and I realize if I build some now and add more batteries later I may not necessarily get the same size.. now I realize if I end up getting something a little smaller later that I simply programmed the BMS to use less capacity on the larger battery Bank But I got...
  • Adding a 2nd inverter just for running A/C

    For current system information please see signature below.. I'm considering adding an additional inverter and setting it up to run the air conditioner in my rv.. currently everything is ran through the same inverter.. the air conditioner if I recall correctly is a 13.5k but... And I think it...
  • Pulling super high amperage from Lifepo4?

    So I've been asked to build a lifepo4 battery system for a golf cart the golf cart is 36 volts... So I would guess that we would need about 12 cells I keep running into is I have read that there can be anywhere between 800 and 1200 amps of surge when the golf cart initially starts moving this...
  • 110v internet based power switching?

    Not sure where to put this I'm wanting to turn 110v power on/off to a device via the internet... It seems that there are many devices that are able to achieve this.. but they seem to The limited to the amount of current that they can handle I figure one way I can get around this is to use...
  • 4p4s 304ah... build starts today

    Well it's starting right now.. 16 Eve cells.. these were originally slated to go in the new house that I'm building but for the time being we're living in the RV and I need more power ... With this heat and running the air conditioner 6 KW hours just ain't cutting it The plan is to initially...
  • Best path for increasing battery bank capacity

    Ok here is the deal... My system specs are listed below... I am considering increasing my battery bank... we will be gone for about 1 week in middle of the heat in the summer... We will be leaving the cat and leaving the Mini Split going... I was not worried about this until yesterday... Of...
  • Chinese shunt... There has to be a better option?

    I recently set up a Chinese shunt for a friend of mine... The voltage reading is close It's a little low I imagine probably due to some minor loss from the two foot of 22 gauge wire that is feeding it The amperage is within about 5% of my fluke clamp meter so I would say that's within margin of...
  • Plan for re-top balancing a 4p4s pack

    So I'm thinking it's about time to re-top balance my 4P4S pack... I mean it's been more than a year since I initially assembled this setup I'm thinking what I could do to handle the rebalance without having to completely disassemble the pack would be to first bring it up to a high state of...
  • Internet based system monitoring?

    /Please see my signature for system specs... How can I monitor this system over the internet? I would like to be able to view at least voltage... or better yet be able to view the app connected to my BMS(s)
  • Looking for cheap MPPT SCC for 12v system(48v capable)

    Okay.. here's the deal I'm looking for a cheap MPPT solar charge controller The plan is that temporarily while I'm building my bigger system I would like to slap a couple panels on to my existing 12 volt system in order to temporarily bolster its performance Currently I can charge at about 90...
  • What is the purpose/importance of the blue film coating on the outside of a raw Lifepo4 cell?

    Just wondering... The purpose/importance of the blue film on the outside of raw Lifepo4 cells Thanks in advance
  • ANL fuses? Low quality?

    So I'm curious about low quality a&l fuses especially the ones that were designed for audio equipment I've been having issues using them when I attempt to start my RV air conditioner all that being said the RV air conditioner is fairly old and that may be part of the problem I've touched based...
  • Quest about cycles

    So I'm looking at two different cells... CATL 271ah... Rated for 4000 cycles(from Eel) Eve 280ah... Rated for 6000 cycles (from Docan) I'm trying to understand if the cycle ratings are actually legit because if they are then the eve cells seem like the clear winner but if it's just an...
  • Series string voltage dropping to 1/10thunder load

    I have a series string of four 250 w San tan solar panels Every now and again.. usually after a few hours of heavy use I noticed that this string seems to drop in voltage and of course output in general Typically I see somewhere between 130 and 140 volts but today I looked and it was reporting...
  • Question about top balancing???

    So initially when I built these battery packs I decided I was going to allow my RC car charger to balance them in series as it has the ability to do active balancing However it became obvious that the RC car charger really wasn't the best option for something like this.. So I purchased a 10...
  • Best way to increase capacity

    So I have set up two battery packs.. both are matching, 4X 230 amp hour Eve cells... Each with their own 200 amp BMS I've been thinking that since I am going to be running a mini split off this that I might want to increase the battery Bank size.. part of me considered maybe just buying a pair...
  • Done with 12v... Help me plan 48v...

    I am done with 12v... It's nothing but trouble... Wanting to build a 48v off grid system... really liking the all in one, inverter/SCC/charger type setups... Kinda thinking server rack lifepo4? I'm ok with used panels... Maybe 4-6kw? I would like to keep the build to around $5-7,000 I...
  • Stackable all in one inverters? Can you mix different units and or brands?

    Can you mix different brands and/or models of stackable all in ones together? I know the official answer is going to be NO... But what is the actual, in practice answer?
  • Mixing and matching similar lithium batteries?

    So I'm looking at purchasing about 200 amp hours worth of pre-built lifepo4 battery packs and I would like to, at a later date, add at least another 200 amp hour But I realize one of the problems with buying cheap Chinese lithiums is that they may not have the same product later So I've been...
  • Questions about battery capacity tests and test equipment

    In this video Will uses a neat little piece of tech... I can't find it for sale anywhere I have something similar, but it has a built in load... 200w... that will take a while on a 304ah, 4p4s battery... Couldn't i just attach a 200 amp smart BMS and an inverter with a heavy and...
  • Advice for increasing battery bank...

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  • Acceptable high current draw load voltage?

    What is an acceptable voltage for high current draw? Where should this voltage be measured? At the battery bank? At the inverter? For instance the inverter might see 11.6 under heavy draw, while the bank reads 12.2... of course recovering to 12.7-12.9 shortly after the draw is complete...
  • RV Lifepo4 battery relocation OR relocate everything?

    So here is the deal... Currently I the following gear in the front cargo hatch under my 5th wheel hitch area(see below)... it's not climate controlled I am trying to decide if it makes more sense to move ALL the gear or just my new Lifepo4 battery bank? The location is only about 5-8 feet...
  • Temporary panel installation on RV slideouts?

    I am going to be parked on my property for at least 1 year, maybe as long as 3 I am going to add 2 330 watt panels(already have 3 - 200 watt panels) I am curious, Should I screw the racks down to the slide out, OR just put some weight down to hold them in place(like maybe some cinder blocks)...
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