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  • LiFePo - charging, BMS and balancing

    i've asked something similar before, but thought i'd start fresh as it is a little different. my 48v lifepo - charge settings are 57.6v (3.6v) bulk/absorb and 55.2v (3.45v) at float and recharge is 54v (3.375v). i'm still a little confused on what is happening...tell me if i have this...
  • is it possible to use just the inverter of all in one units?

    i imagine it may defeat the purpose of the way the units are set up/designed to be used, but if you have an all in one such as the growatt spf3000tl or eg4 3000ehv....is it possible to use JUST the inverter?
  • SK48v100 batteries shutting down

    I have a pair of SK48v100 batteries, in parallel, that I purchased in June. So far, they have been working fine. Today when I realized I didn't have any internet I thought my inverter had shut down. When I checked on the system, everything was powered off, including the batteries. I reset...
  • charging/discharging LiFePo efficiently to maximize life

    system: 1800w panels, xantrex xw-mppt60-150, (2) sok 48v lifepo, still shopping for a new inverter. i'm a low use electricity user, even fully on grid - about 6kwh/day. i use my solar as backup power and to run selective loads. i have a question about using the lifepo efficiently... if i...
  • victron cerbo - when is it necessary/beneficial?

    i currently have a xantrex xw-mppt60-150 charge controller, victron smart shunt and (2) sk48v100 batteries. if i add the victron multiplusII 48/3000 as my inverter, is there any benefit, or need, to using a cerbo? i believe it will allow communication between the batteries and inverter, but i...
  • new member, not so new solar hobbiest...several battery related questions.

    so i built a small DIY solar setup probably about 15 yrs ago now - off grid, mainly for 'backup power'. i have (10) 180w panels, a xantrex mppt 60 150 controller and 6v FLA batteries configured into 48v. my outback inverter died (that's another story). my current battery bank is 48v @ 440ah...
  • Charging my SK48V100 - i guess i don't understand what's happening

    i finally got the batteries hooked up (2 in parallel) and the charge controller set up. I'm watching the BMS on the batteries and they are not the same during charging....for example, if the c/c is outputting 20a, one battery may say it's getting 15a, the other 5a. i figure this is the BMS...
  • lightning/surge arrestor installation

    i found some lightning arrestors, that i forgot i had, in my original box of equipment from a few years ago. i don't know why i never put them on, but figured i probably should. the plan was to put the DC one in the PV disconnect box and the AC one on the breaker feeding the transfer switch...
  • are there any good, budget, standalone 48v inverters?

    i'm looking for a decent, budget, standalone 48v inverter (3000w-5000w). seems that all there is now are the all-in-one units like the EG4 and growatt. and for $700, they are probably an amazing deal....but right now, i only need an inverter. you'd think you should be able to get one like in...
  • victron multiplus2 - ATS

    i presume that the ATS/UPS only functions when the inverter sees AC input from the grid? more accurately, if there is AC input to the inverter (and UPS function is ON), the AC output is only active when the grid goes out? i want to selectively control the loads w/ a manual transfer switch, so...
  • buss bar - connecting 2 batteries in parallel

    if i have 2 batteries i want to parallel, is it necessary to use a buss bar or is paralleling w/ the cables alone adequate? with just a pair, does it even matter? thanks!
  • SK48V100 - charging parameters

    can anyone advise the correct charging parameters for the SK48V100's? CC's site says absorb at 57.6v, and to leave float on, but doesn't say to what...also 57.6v? what about bulk? my controller doesn't have LiFePo as a preset, so I need to make a custom one or use one of the FLA/AGM presets...
  • dumb question about PV input voltage

    so i'm now looking at the growatt spf3000 series. there is the lvm-es and the lvm-48p. i think the ES may be the newer model. the ES has PV input voltage of 120v-250v and the 48P says 60v-115v (145 voc). i have (10) 180w panels, ~36v vmp, 5a imp and ~45v voc. all 10 are not identical, there...
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