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  1. M

    Charging issues - Growatt

    You've got the same Growatt as me. How do you make sure your batteries are charged? I typically keep mine plugged into shore. I've got an 8 bank of raw LiFePo4 280aH cells to make 24v battery. It seems my battery slowly depletes until it reaches about 24v (the Growatt cutoff), and then it...
  2. M

    What I expected…. What I got…

    So, how was your template off? What did you not account for. I need to know these things for when I start mounting/purchasing solar panels. Currently, I've got my inverter plugged in, and have a battery bank, almost ready to finish my build... just waiting on a BMS and crimping a few more wires. ?
  3. M

    Overkill Solar - Wrong BMS Size for my system?

    I just read the reviews, good catch...
  4. M

    Overkill Solar - Wrong BMS Size for my system?

    @smoothJoey I guess I forgot to describe the positive side of things. Battery Positive <-> 250 Amp Breaker <-> Battery Disconnect with @FilterGuy 's pre-charge design( https://diysolarforum.com/resources/inverter-disconnect-switch-with-precharge.60/ ) <-> Growatt
  5. M

    Overkill Solar - Wrong BMS Size for my system?

    Still a build in process. 200/250 AMP BMS should arrive on Friday. Waiting on BMS to arrive Friday. Battery <-> BMS <-> Negative Bus Bar <-> Growatt Hopefully this will give you some idea of what I'm doing. I'm not claiming I know what to do, but it's been a slow process, just doing one...
  6. M

    Overkill Solar - Wrong BMS Size for my system?

    I'll try and get some pictures tonight. I'll post on here. I'm also in the process of contacted a member in the "For Sale" forum, about their 200/250 Amp BMS.
  7. M

    Overkill Solar - Wrong BMS Size for my system?

    Basically, but no panels as of yet.
  8. M

    SOLD: Daly 8S 24V 250A BMS

    I sent you a message.
  9. M

    Overkill Solar - Wrong BMS Size for my system?

    So split up my 8s, to 2p4s?
  10. M

    Overkill Solar - Wrong BMS Size for my system?

    I understand that, however I've built my system for 150 amp capacity. With my usage, I don't think I'm going to hit 150 AMP, but I may touch 100 amp, so may have some issues. It's understood. Now, new question. I'm looking at DALY 200/250 A systems on Amazon. I see they come with 2 AWG...
  11. M

    Overkill Solar - Wrong BMS Size for my system?

    I'm also asking this, because the OverKill solar has 2 negative leads for input and output. So, since it's (splitting?) the power, can I run a smaller cable.
  12. M

    Overkill Solar - Wrong BMS Size for my system?

    Okay, so this is a dumb question probably, but I want to run it by people with a lot more experience and knowledge than I have. I bought my 1/0 AWG THHN cable, 30 feet of it. I've run 1 leg of my cable so far, hopefully I'll get the return feed knocked out tomorrow. So far, I've used ~ 10 feet...
  13. M

    Growatt SPF 3000 TL LVM ES without batteries

    I just got mine wired, and it won't turn on with just A/C input. Hopefully this weekend I can run my thick cable for D/C input.
  14. M

    Overkill Solar - Wrong BMS Size for my system?

    Won't be using the microwave. The purpose of my battery bank is comfort and silence. I did energy audits with a KillAWatt, plugged into 15 amp service panel. Only thing I need is to run the battery bank at night to keep the A/C on, possibly some TV. Cut the generator off at a reasonable time...
  15. M

    Overkill Solar - Wrong BMS Size for my system?

    I bought 30 feet of 1/0 AWG. The absolute "MAX" would be 15 feet each way, but likely, it's going to be more like 5-8 feet. For a total run of ~20 feet.
  16. M

    Overkill Solar - Wrong BMS Size for my system?

    Where are you getting 2 AWG pure copper wire from? I see lots of different recommendations on wire size, I chose 0 AWG because of the calculator on https://www.fabhabs.com/dc-cable-sizing-calculator. Maybe 2 AWG will do it, but certainly going overboard with 0 AWG shouldn't cause any issues...
  17. M

    Overkill Solar - Wrong BMS Size for my system?

    Yea, i figured the max I should pull out would be 150 amps. Can't decide if I want to fuse my system at 150 AMP from the battery or at 200. Either way, that's a catastrophic failure. To be honest, I don't think I'll quite pull > 100 amps all the time, or a lot? Most of the stuff I have my...
  18. M

    Overkill Solar - Wrong BMS Size for my system?

    Good to know. I guess if I'm running full load I may have issues. I'll deal with that later I guess.
  19. M

    Overkill Solar - Wrong BMS Size for my system?

    As I'm slowly figuring this out... I think I purchased the wrong BMS size for my system? Growatt 24v 3000 Watt Inverter 8 * 280 Ah LiFePo4 EVE Cells Overkill Solar 8s 100A BMS I am getting ready to buy the wire, was going to use 0AWG wire, with expectation of about 150 A max pull. Is this...
  20. M

    Growatt SPF 3000TL LVM - 24v - 8 * 280Ah LiFePo4 - Ventilation (?) - RV Specific Question

    Okay, that makes sense to me. I will be using Will's recommended settings which off the top of my head is 23.1 volts. So 3000/23.1 = ~130 × 1.1 = ~143. So I only need a 150 Amp fuse off my batteries?
  21. M

    Growatt SPF 3000TL LVM - 24v - 8 * 280Ah LiFePo4 - Ventilation (?) - RV Specific Question

    So, maybe this is a dumb question, I'm still learning, and ready to start building though. Trailer Input = 30Amp @ 120v My batteries = 24v I'm going into a 3000Watt inverter, and according to GroWatt manual, it says 24v @ 164amp MAX D/C input. that is 3936 watts of power. On the fuse size...
  22. M

    Growatt SPF 3000TL LVM - 24v - 8 * 280Ah LiFePo4 - Ventilation (?) - RV Specific Question

    Not sure how/where I could cleanly hardwire it. I've looked all over the trailer for storage ideas, and the best place I can come up with is under the bed. If I mount to my existing TT-30 input, and output there, then I've got to figure out how to route a new thick cable to the batteries, that...
  23. M

    Growatt SPF 3000TL LVM - 24v - 8 * 280Ah LiFePo4 - Ventilation (?) - RV Specific Question

    So, I'm more of a visual person, and I'm trying to get all this put together. Trying to build an Amazon shopping list, and check it twice. At this time, I will not have an PV input on the Growatt, but as soon as I can get down to Santan Solar's warehouse, I will be adding that. I did not...
  24. M

    Growatt SPF 3000TL LVM - 24v - 8 * 280Ah LiFePo4 - Ventilation (?) - RV Specific Question

    Side note, I read the operating temperature of the Growatt was 55c, which is about 130F. Even if it's under the bed, I don't think there is any way whatsoever it can get that hot. I did speak with the boss, and maybe I can put an input/output DC fan on the bed, to at least "regulate" the...
  25. M

    Growatt SPF 3000TL LVM - 24v - 8 * 280Ah LiFePo4 - Ventilation (?) - RV Specific Question

    Preamble: I've been slowly collecting the materials for my RV off grid System. I ordered a GroWatt SPF 3000TL LVM back in June and received it promptly. I ordered an Overkill Solar 8s 24v BMS, and received it within a few weeks. I ordered 8 LiFePo4 cells from China, and waited 95+ days for...
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