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For anybody working a similar use case here are some quick instructions on how to permanently change the supply voltage on the Eltek FLATPACK2 units mentioned by the OP and in #307 above. I received the three units I ordered - well packed as described. They were all set to the default voltage...

I couldn't find any posts related to trying to get forum members together in person. Grab a beer, trade notes. If I missed a section on this point me in the right direction, thanks! Personally would be up for connecting with any folks in the central or northern front range Colorado area: any...

The chargeverter is a couple of (cheap) standard telecom 48v "rectifiers." If you want an alternative you could buy used commercial telecom power supplies and wire them yourself. I bought these Eltek flatpack2 units at $50/ea. you will need an interface board to wire to them and you will...

Rhino: this is why suggested to you set float to a bit over 56V or to at least the 55.6V spec in the manual. As I showed in the graph many BMSs won't show full charge until they have no current flowing at their specified charge voltage. Your batteries are "mostly" full and they are probably...

Here's some details on the overload capacity. Chart is L-L but spec sheet clarifies L-N for single leg is even more impressive compared to some other HV 120/240 inverters that struggle with imbalanced overload.

There is a channel for a pin on those type of MCBs that support LOTO devices like Like these and these.. and the master lock version (which is the only one I've seen in use).

@MilehighMike : if your fridge is the propane absorption type then running in AC mode they are INSANELY inefficient. Basically they use a ~300watt resistive heat element to generate heat to run the absorption cycle when in AC mode. My RV fridge will run 300watts on about a 50% duty cycle...

There are other resources but to quote a good post on this forum here is a good explanation of separate charge and discharge fet control https://diysolarforum.com/threads/bms-mosfets-explained.29318/. the discharge FETs remains connected when the charge FETS disconnect due to charge completion.

~17.59 in the first video. The only way to make it safe is to turn it off. The only way to turn it off is to have an effective ground fault path for something that may become energized (eg metal case etc). Since you will be touching the ground and you may touch something energized if the two...

In the right circumstances I think we're getting close to being able to replicate the grid with less cost than the grid. Grid cost me $80K. $80K in solar and storage would buy something that doesn't look like camping. Sure the overall house has to be efficient and you have to be more...

I don't know how to resolve the "with some batteries" and then I don't want batteries. But yes most of the low frequency all-in-one inverters will run without batteries if there is enough sun input for the load. I've reproduced this situation for example - works fine. Welding is a very...

Here are some 2000watt AC/DC (input) flatpack2 units on ebay for $50 including shipping for anybody else on this journey. I just bought 3!

Mega Chargeverter! 8000watts for $899 if anybody is interested. I'd been looking for the Eltek Chassis and controller on the used market and here's the best deal I've seen come up on one. 2U rack with 4 2000W units and the controller in the chassis with room for 3 more. More than I want to...

@Dave911 same with the Eltek. There is a "live" voltage setting that doesn't persist through a shutdown and presumably doesn't write to flash and a separate voltage setting that does write to flash and actually doesn't take effect until a power cycle. For my current use I plan to set the value...

Okay that is where my 6000EX isn't the same as the 6500EX it appears, didn't realize that. The display panel connector is the same RJ45 but I guess you are talking about these connectors? I don't have these on mine, only the RJ45 goes from the cover to the main chassis. Still even in the...

sorry should have been more clear. I quoted "rectifier" because that is the term the telecom industry uses for its AC to DC power supplies. I agree they are much more than just a rectifier only. That is the industry term, however, and knowing that can help somebody searching for product...

You are probably looking at about a "5 SQE05-180" if you know what flow rate you are after (probably 6-7 GPM)? you can use your 79ft of static head, or the full 110' depending on how your well draws down when you pump from it. That and the nominal length of pipe to a distant fixture you hope...

I'm not sure I follow what you mean by "an AGM" in that context. Do you mean another AGM battery between the two? The biggest problem with charging an LFP battery directly from a car alternator isn't that you will damage the LFP battery it is that the incredibly low internal resistance...

This may be a bit geeky and I don't have a known problem I'm trying to solve but I curious if there are others out there with Trophy batteries that understand their heater sequence in detail. I know from the docs and discussion with Dan that they divert charging power to the heaters if the...

Nice system! I'm pondering something similar at my new house build - you may be inspiring me. I started in solar thermal (vs PV) and still passionate about it but I am questioning whether I could more flexibly do the same thing with just PV - yes it will take more panels due to less efficiency...

Megarevo has one for 400V battery systems. https://www.megarevopower.com/productinfo4.html There are several more commercial solutions that utilize ~400V battery systems https://oztekcorp.com/products/ - not sure if they make any All-in-ones though or just separate 400V battery inverters I do...

Here is what I believe is the only manufacturer of molten salt batteries in this smaller size (non grid scale) https://www.fzsonick.com/ They can freeze and be re-melted. RTE is decent if you are constantly charging and discharging but standby losses are "complicated." it takes 120watts to...

Old thread but I didn't see this manual mentioned and thought it might benefit those that found their way here. I'm in the camp that these non UL rated breakers scare me and I do plan to replace mine soon. MidNite/CBI can be had for not much more money in the scheme of things. Anyway though...

Raw efficiency may not be tons better but there are those trying to commercialize this salt descendent cycle for its energy storage properties, or waste heat such as these guys: https://bluefrontierac.com/ research on the topic as well https://www.nrel.gov/docs/fy14osti/60695.pdf

Some of the packaged batteries have it built in. I had been using a pencil and then moved on to a switched resistor and then one day had Dan who owns Trophy battery on the phone and he pointed out there is a pre-charge in their batteries that you have to press the reset button and cycle the...

Can somebody point me to the rs485 connector on the 6000xp? it doesn't look like the board diagram above which must be the 18kpv. The board has this green on white lettering referencing P1 and P2 but which of the RJ45 plugs is it talking about? Surely not BatCom or you couldn't also talk to...

Same here, I'm building a house where the default/historic option is to pull a new power line (needs to run about ~1mile) at a cost of about $80K. $80K pays for a lot of solar and batteries. But when you are building new and home values are $800K+ the $50K for solar+battery plus the rest of...

I only see one Wired Dongle on the EG4 website. https://eg4electronics.com/categories/communication/wlan-ethernet-adapter/ @EG4TechSolutionsTeam Message #5 in this thread above indicates you can local connect to the wired dongle for Modbus. Yet the subsequent messages talk about not being...

Okay I understand better now. If you are using the DC/DC converter that can regulate the power draw from your alternator I'd have to agree with @Larry-Cleveland . I don't think any lead acid battery is required on the alternator side of the Dc/DC charge controller. I think the "notion" that...

you right... I was thinking of the case where you pull the battery after already running.

@sidepipe this is working great for me on a Trophy 48V100E battery which somebody on this forum suggested had a Seplos BMS. Thanks! That said, does anybody know where to find the Seplos protocol documentation and maybe extend this script to capture the warning and errors values? In my case...

All of the pump manufacturer's own drives slow/soft start on purpose with no impact on warranties etc. I can't find a spec for my 4" pump and motor anywhere but the 6" and larger motors from the same manufacturer say ramp up should be set to get to 30hz in 1 second or less (page 12). There...

For the price when you say "professionally installed" I think the Schneider XW deserves a look I don't have one, I have a cheap EG4 inverter but will likely move past the Voltronic (MPP, some EG4) and Luxpower (current EG4 line) stuff when I go full scale. And just not seeing good stuff on...

@ChrisG : for what its worth my system did restart on its own today. It will be interesting to see if EG4 explains the sequence of operations here (in my case for a battery with no comms). Here is what I saw the last two days. Today (8/1): AC output turned off at about 6:30am when battery...

They use CANBus. Lots of info on reverse engineering Eltek CAN protocol in this thread. Unfortunately I never saw any indication that protocol documentation is publicly available I think it is just used to communicate to their own user interface.

I have no battery communication so my battery cutoff is using the Voltage level not SOC. Under that condition should the loads go back to being powered after some increase in voltage above the cutoff?

No, the BMS is inside the Big Battery box and it is monitoring the individual cells. Unless you are using communication cables from inverter to batteries the only thing the inverter knows about is the DC bus voltage to both batteries. I do think if any of the responses to you have been...

Has anybody found any of the custom circuit boards for the flatpack2 in the US? There are several on ebay plus this one online but all in Ukraine or Lithuania. I will if I must but rather not wait for it to get shipped half way around the world.

Good find! I hadn't been able to find any info on the rectifiers they use. the CAN protocol documentation for the top US telecom commercial units (eg Eltek, Emmerson) is also not published unfortunately so bummer but not surprising. Some work to reverse into them on this forum and others.

Double, include both to and from. If you are using an online calculator or chart though some already account for that.

Moreover if you put the N/G bond downstream of the GFCI isn't the GFCI going to always see that as a ground fault and trip. I was actually thinking ironically he wouldn't be creating an unsafe condition because the GFCI would be tripping all the time :)

Not sure about the PF spec for the chargeverter itself but the commercial (generally more costly) telecom rectifiers have power factor of near unity (0.98 or so). I would expect if the chargeverter has halfway decent rectifiers they are pretty high PF (eg have internal correction and aren't...

Got my bag of salt for sure :) But sometimes the YT Yahoos running a test that is reasonable to them are more meaningful than the manufacturing showing one they know will work! And the Ben guy he seems connected with has about 5 videos where he pulls out a Schneider for a Sol-Ark and 5 more...

Awesome! So that setting #17 in the manual does what I'm after? The description of what "Battery Wakeup" does wasn't clear but if it supplies 48v to wake up the battery that makes sense! Thanks

These are great and I recommend too. But if you are in a pinch and don't have one OP should consider watching the battery discharge rate (amps) and going around messing with various loads: turn everything off and make sure amp draw is limited to inverter standby. then turn on only the TV. then...

I just can't give Sol-Ark a pass on this one though. Starting a single load isn't something that can even be balanced. Two loads that have to be run on the same circuit is reality.

@johnnysolar if you are still studying and learning (aren't we all). Ben here has a some good practical videos of N/G separation and ground fault protection including one where traces down some stray ground current because a piece of equipment in his house is causing an undesired N/G bond ...

at what voltage? There is no setpoint in the interface

Ha, he must be a DIY Solar Forum member :) Still a pretty good deal. I programmed all three of mine but unfortunately waiting on the board from Lithuania it will be a while before I can put them in use. I bought the compact M4 nut version of the board so need to think about how to mount and...

thanks @diso12 read that post but everything confirms I'm wired in to the CT1 port correctly (D- far right pin, D+ second from right). I unplugged the dongle (which I hadn't done yet) and I was surprised to see the RX light on my transceiver flashing (>1 per second) even with the dongle...

For sure. Not proposing you use the generator. Chargeverter works plugged into grid power as well. Just proposing you may be able to resolve your surge issue by having something other than the all-in-one provide your source of AC grid power and just let the all-in-one be an inverter.

Fair, I presume you are right but that leaves something I don't understand then about why the upstream one matters at all... darn it... more mystery :( oh well.

@EG4TechSolutionsTeam : Can you comment on the sequence of operations for the EG4 6000XP when it goes off from a low voltage condition and the voltage rises again when (if ever?) should the device re-enable the EPS output? And Can you please add a low voltage cut-on OR other way to assure that...

And my wifi dongle has no ports open - once it is connected to the eg4 monitor site. Do you need to not make that connection to keep it open for local use?

There is also the issue that even for rs485 modbus @EG4TechSolutionsTeam has removed the modbus manual from their website and the links above (that are in the eg4 site) are broken. Does this mean we can't count on modbus being supported and it could be removed from future firmware at any time...

My question is none of those ports are standard Modbus (port 502) even though message #5 above says it can be locally connected to via Modbus. How, what port? And to your point my experience scanning the wifi dongle with NMAP is that once it is setup via the app or port 8000 it then closes off...

Did you have to disable or disconnect the HDMI-based dongle in order to get the serial port to respond consistently? In the Modbus manuals above it suggests you can leave the dongle talking to the eg4monitor site as long as you don't poll it too fast locally. However, I find when I connect to...

I run an 800ft deep well and two RV trailers on a site with a small system: (9) 385 kw panels (1) EG4-6000EX inverter - works great but they are out of production so I don't recommend unfortunately. I think EG4-6000XP would be a suitable low cost replacement - plenty of others as well. The key...

@diso12 . I'm still confused. I don't see in that code where you are adding values for "SN". modbus_read_registers(ctx_, start_address, num_registers, registers.data()); Here is my modbus message to read register 15 from device 1. This is the same as your code would generate for that...

faster flow will get you more heat from the system (log mean temperature difference and all that). But it could be overkill if you don't need it and slower flow could allow you to discharge hotter water from the collectors.

I think I have my head around what you are saying. I was testing at my house though and probably don't want to remove the panel bond for fun. But I could give it a go on my offgrid solar system next time I'm there :)

Agree on the three phase. I run an off-grid system with an EG4-6000EX powering my pump drive and other RV loads, tools, etc. Once you get AC power out of the inverter there is nothing solar specific about my water system. I do think that most of the well pump specific drives are very over...

@Rednecktek and @Q-Dog These guys have some 24Vdc and 48Vdc heat pumps both as window units and mini-splits. I'm looking for a 48Vdc mini split to cool and heat two very small container units (about 9'x9' each). Any body have any experience with these or recommend something else? These are...

You only need one inverter, the pump drive or variable frequency drive (VFD) makes three phase from single phase and at varying frequency to control pump speed.

Yes, if you are charging from a 15A outlet you should limit Setting 11 to 15A. Otherwise it won't know not to try to pull enough current to trip the breaker on that circuit. I would expect Setting 11 (maximum utility charging current) to be unrelated to battery type though. Make sure #33...

There would be inrush running the three phase pump directly from the inverter but there is no inrush running a three-phase pump through a VFD or "pump drive." The VFD also acts as a soft-start and slowly charges its capacitors and then ramps the pump from 0-XXhz over some set period - I think...

Yes AND to point #1 to bond the stray voltage to ground and eliminate potential/voltage differences. If all you wanted was a path back to the source for your stray voltages to trip the overloads then technically they could all be bonded to each other and back to the source (aka Equipment...

I can't speak to Overkill but realize too that some BMSs recommend matching bulk/float/absorb supply settings to the battery because they will handle their own sequence after bulk. Not to agree or disagree with whether this is a good/bad idea but if I keep 56.8 applied constantly to my Seplos...

I know this doesn't answer OP concern but for those looking to solve this with a new generator: Delta DC generator. Several of these on the resale market for darn good price. 7500 watt 48Vdc for <$1500...

I run these in from Battery Hookup in my batteries. I believe I'm running them three in series https://batteryhookup.com/products/24-48v-150w-battery-heating-pad-hi-heat-made-in-usa?_pos=9&_sid=d266c98d1&_ss=r&variant=42670803878050 Looks like they are out at the moment but they are pretty...

Hmm.. still stuck as I mentioned above my wifi dongle has no open ports once you connect to it and set it up (so that all lights are green) after a few minutes it stops responding on 8000 and all others. Even though it updates the eg4 monitoring website fine. It appears to be "push only" even...

This post by @marionw seems to suggest the rs485 pins to interrogate the inverter itself are in fact in the battery comms jack. I guess I'll give that a try unless anyone else knows for sure? And does the modbus address have to be set by modbus command? I found a post where it is accessible...

Does anybody know if the 6000XP works as a solar charger with the inverter off? And if so what are the parasitic losses in that condition? I can't find anything in the manual on this. Right now I run a 6000EX and both that and the similar MPP-LVX6048 will turn on and charge batteries even if...

When I bought an MPP LVX6048 from Ian at Watts247 and I wanted to do this and he told me that there was a pair of wires in the RJ45 connector for the display that were connected to the state of the push button. I still haven't tried this but he said you could remote control on/off by connecting...

I have a remote off-grid system that from time to time has enough power drain and snow on the panels to cause the LFP batteries to shutdown due low voltage. When the snow melts and the sun comes back there is no good reason that the solar charge controller (EG4-6000ex right now) couldn't supply...

I am very happy with the luxpower based products. Head and shoulders above the MPP ones and still at low price point. Just have my hopes up given the success they have already shown. Not blasting the product overall just this telemetry bit.

@Tecnodave any chance you know which CBI breaker they are using for MNEPVXX-600-2PP breaker? I just got off the phone with "James" at MidNite tech support because the images here show + upper right and + lower left conforming to the normal convention for other DC MCBs and he confirmed that the...

He is only changing the inverter settings anyway. The BMS is going to control the charge situation as long as the inverter is providing more voltage than the BMS needs it isn't going to impact the battery. 58v at the inverter doesn't translate to 3.625v/cell because the BMS is just going to...

In my experience with those Voltronic made inverters changing one setting doesn't impact others. Changing battery type is not going to change the max utility current.

Thanks @gotbeans . Do you know who OEMs the EG4-3000? It doesn't look like their older Voltronic units (like the 6000EX) or like the newer LuxPower ones (like the 6000XP and 18K). I just wonder if the 3000's behaviors would match the 6000XP just because I think they aren't made by the same...

@wildbillpdx when you have an issue with the microwave are you running the 6000EX with AC power input (grid or generator) live? I find that my 6000EX - and the similar LVX6048 I had before it - handles surge load great when running from battery or solar but not well when passing AC power...

Good discussion for for sure, my motive anyway :) I've always liked the Mike Holt stuff and is "style" is to be very clear about the CORE reason/purpose/whatever - almost to the point of provocative sometimes - which is great because I think there are a lot of misconceptions (especially in...

Probably won't have a single cab option but Ford Ranger EV (2025) meets the small and under $40K (target, we'll see) goals https://www.topspeed.com/ford-ranger-lighting-ev-is-what-we-need/

@fmeili1 : while I agree that finding a digital input option for shutting down the inverter should be the goal here... since you mentioned the Modbus interface have you had success writing any values over Modbus and changing inverter settings? I was excited to see modbus for the 6000EX as...

Don't agree. We are talking about a fault/stray voltage of potentially unknown cause. We don't know either voltage, current carrying capacity or impedance of this new path that is been created unintentionally. If a few strands of wire touch the chassis of a piece of equipment served by a...

Since the original post asked about an API. Does anybody know what the purpose of this API is? https://eg4electronics.com/api-documentation/ What is the end point? Since the dongles don't respond on any ports I'm assuming the end point is the cloud system (eg monitor.eg4electronics.com).

I'm also getting Error 32 on an LVX6048. However, I didn't do a firmware upgrade and it is generally working fine other than.... at roughly the same time the unit stopped powering up unless it has active connections on both Battery and Solar inputs. Once I power it up with both it will stay on...

Same here. Dan told me with such confidence that it is isn't a Seplos - but I can talk to it with Selplos protocol, it uses the Battery Manager that looks like Seplos - and then the circuit board... looks like Seplos. Either way @Lt.Dan or OP @MCB do either of you know what BMS is in the...

I agree with @v_brothers_ranch . I definitely wouldn't replace the pump just because the drive failed. I think the SubDrives and Aquavar's (pump drives) are significantly over priced but that is at $1800-2k $6K is with some labor or something to replace it right? Not just for the unit? I...

I meant to say "they"=[some the BMSs] will handle bulk to float sequence regardless of supplied voltage and without an OV condition. This seems distinct from the general philosophy most hold that the "BMS should only be for last resort for protection." I say "some BMSs" because I don't know...

What I was talking about is component-level protection per rectifier, between the individual rectifiers and their first point of common coupling. The rectifier rack (collection of rectifiers) is already protected. For what its worth after digging into Eltek's pictures and schematics they...

He's got qty (4) of the bundle, each of the bundle includes qty (2) of the 14.3KWH batteries.

Push in terminals on the 6000xp are these connections:

Here is the cut sheet https://www.power-solutions.com/wp-content/uploads/2012/02/EV-Flatpack2482000HERectifier.pdf While it is clear they will operate down to 120V AC (or DC) it is not clear what the output would be. I would expect it could be a little more than half?? it could be as much as...

Conservative is good but I would increase your float up to a tad over 56v. Example here is a charge curve from my batteries this morning (I run a similar off grid to RV setup as you) only with 2x 5KWH Trophy batteries and an EG4-6000EX inverter. To points others have made it is very likely...

Follow up and slightly different than my original post. Question to other 6000xp owners on this. I have found that the 6000XP does not recover from low voltage without user intervention. Even if you set it to turn off before the BMS. I called SS and they were surprised by this but we...

While I can't help you with the fact that we both bought a product weeks or months before it became obsolete I will sell you my 6000EX (that I just bought August 7th) great condition, limited use. so I can go buy a 6000XP.

Old thread and OP @Solarpump doesn't seem to be active on here but to provide a point of data related to post #3. I can confirm I start and run my 2HP well pump on solar only through a 6kw EG-6000EX - that used to be an MPP LVX6048. But it is a 3-phase pump and I'm doing that through a VFD -...

I presume you aren't trying to use battery communications - all I've seen the Trophy battery and Voltronic inverters can't talk - which is no big deal. But in that case you should set Setting #5 it to "user-defined" which is setting "USE". If your use case is portable storage and you only...

I have a remote system with a bunch of 48Vdc and 12Vdc loads (security cameras, weather station, routers, starlink). I was using an MPP LVX6048 and just leaving the inverter AC output OFF. In that condition the unit goes off at night and when solar reaches about 120v it turns on and charges...