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After a year and a half of research, design, building, and this past week, my inspection, I passed with only a minor labeling change required. The summary of my small system is in my signature. Thanks to @Will Prowse for this forum. Particular thanks to @sunshine_eggo and @timselectric for...

My wife (bless her), tells me that this: Is actually this with a fixed chameleon circuit:

I was watching Adam's excellent video on ignoring Multiplus II AC Input here: @Adam De Lay I was about to set up my inverter to ignore AC Input in certain circumstances. As my inverter is already hung and I didn't want to bring my laptop out to where the inverter is hung, I wanted to see...

This is hydro, not solar, but I thought this community may have some interest. Boulder, now Hoover dam. We toured the innards yesterday. Here are the turbines on the Nevada side. These plus the ones on the Arizona side... 4 billion Kwh/yr. Paid off and self-funded. They say the structure itself...

I have heard/read reports of fan vibration noise in Multiplus II inverters. I just found this...There appears to be a retrofit kit available for those models affected, where firmware updates don't help. Some other options herein may or may not void your warranty....

Question about breaker use for 3+ parallel strings: I understand the following: 1. When combining two series strings, no OCPD is needed, as in the case of a short circuit in the first string, the second string can only push the max of the Isc amp rating of a string into the first, which is...

I know this is off-topic, but we often talk about circuit breakers and such here and show and tell is the closest forum to this. Buzz Aldrin knocked against a circuit breaker in Apollo 11 after returning to the LM, breaking its button. (The breakers were push button). The breaker provides...

I know Victron now supports the Ruuvi bluetooth temperature sensors in the Cerbo GX, but .. I installed VenusOS 2.9 on a pi4b and was able to get a digital thermometer DS18B20 recognized by the Venus GUI. I used the following git project: https://github.com/LHardwick-git/Victron-Service The...

I have a Multiplus II 3000/48. It works well. I recently enabled AES Scan mode. Last night I wanted to use the single GFCI outlet I have connected to AC out. The outlet was blinking yellow, then green, yellow, then green. I thought, oh dear, I have a ground fault somewhere, and went to bed...

At my DC panel, between my PV disconnect and between components on the panel, (charge controller, battery, DC loads, all with appropriate breakers), all runs less than 6 feet, I want to use (L)FMC (Liquid Tight)Flexible Metal Conduit, to meet the NEC 2020 requirement that all inside DC circuits...

In finalizing my design for powering a barn off grid, I was planning to put my GFCI breaker in my DC distribution panel, but before (PV side) the charge controller, as many diagrams have shown, here and elsewhere. However, I came across this...

In getting ready to wire up my ground mount (finally), I know NEC says that ground wire subject to damage needs to be AWG 6. Ok. So I wire up the exposed panel/array grounding wire as AWG 6. So say I connect said ground wire to a busbar in my combiner box and want to run said ground wire...

Anyone know of or have a recommendation for a lockout for midnite Solar MNEPV din-rail mounted breakers? I have a MN big baby enclosure with a few MNEPV breakers. I'd like a lockout device. This is one, but I don't know if it would work. If anyone knows of one, let me know. Thanks...

The MNPV12 combiner: https://www.midnitesolar.com/productPhoto.php?product_ID=144&productCat_ID=9&sortOrder=7&act=p includes a standalone busbar that you insert into the row of breakers you provide. The specs state that this 'freestanding' busbar is rated at 200A. That's fine, but the...

Do I understand properly that the MIdnite Solar 300V surge protector could be mounted to one of the MNPV (3,6,12) combiner boxes for use outdoors? Does it come with the appropriate gland for a weatherproof seal? I am thinking of using the MNPV3 with a single 300V breaker as a PV disconnect (an...

The Multiplus II, 48V/3000VA/120V appears to have a manual here: https://www.victronenergy.com/upload/documents/MultiPlus-II_3kVA_5kVA_120V/32424-MultiPlus-II___Quattro-II_120V-230V-pdf-en.pdf (Not sure why 'Quattro' is in the URL) In it, in the appendix, it shows that the AC input and output...

Which BMS do the EG4 LL V2 batteries use? I've seen chatter elsewhere but no specific answer. I think there may be a difference between v1 and v2 and the earlier non-LL ones. I do not own any yet, but am considering the EG4 LL V2 24/200, and would like to know before I buy Thanks -Chris

My ground mount array will be 1600w, 4x400w, 2S2P. The combined Isc will be just under 23A, and the combined VoC is just over 80V, after the 2S are combined., with a max voltage at cold temperature of 117V. Battery voltage will be 48V nominal. This is an off-grid system, for lights, a plug for...

In this post: https://diysolarforum.com/threads/correct-wiring-for-solar-panel-spd.41181/post-521019 Two options are presented for wiring the SPD. Regardless of the option chosen, what is the preferred way to do the physical wiring? As the SPD is wired in parallel, I see several options to...

It appears that BMS tools for the LLv2 batteries, and BMS Test for the Lifepower4 batteries are now available for Macs: BMS Tools: (It says iOS at the beginning but the demo is clearly for MacOS) BMS Test: @BenFromSignatureSolar Do/are you going to offer/support these? Is there a reason I...

My system has a single EG4 LLv2 48V battery. For safety, I was considering adding a battery fuse in addition to my main breaker off the battery (not the battery switch/breaker). as I have seen recommended. After doing some calculations based on my max inverter surge watts/current, additional...

Are the SFK BMSs actually rebranded/custom built JBD BMSs? Are SFK BMSs compatible with Victron VenusOS/Cerbo for reporting state of charge, etc?, either natively or with something added on in SetupHelper? (Thus not needing a shunt). Here is an example BMS, I am aware that different models may...

I am considering adding an SPD to my system design (not yet built) on the PV side, before the SCC. This suggests that perhaps I add a set of short busbars, one for PV+ and the other as PV-. to which I can add the SPD. Most busbars for small systems seem to have a voltage rating <=48v, although...

Do I understand the following issue properly? Note: I do not have any of this equipment yet.... 1. Let's say we have the Victron 1200/24 Phoenix Inverter for my 24V battery system, (120V AC output) 2. The Peak/Surge rating for the Inverter is 2200W 3. And the efficiency rating is 91% Let's say...

I'm thinking of trying out DVCC in VenusOS to share voltage, current, etc. between my Victron MPPT and Multiplus II inverter/Charger. Elsewhere, I posted how I was able to hook my EG4 LLv2 battery BMS to VenusOS over CANBus...

Does anybody have a recommendation for breaker filler covers (not the wire knockouts) for the Midnite Big Baby breaker box? I initially had two MNEAC breakers mounted on the left side. However, I need them mounted dead center, to provide enough space on the DIN rail to mount two terminal...

Scenario: 1. Metal pole barn, walls are steel. 2. Ground mount PV array (I was previously going to do a side-of-building mount -- too complicated) 3. 60-70ft cable run from PV to panel with MPPT SCC and other equipment (PV disconnect, battery, et al) through rafters of barn. 4. I will ground...

The eg4 LL V2 batteries have a BMS CAN port that is a modified pinout RJ45 port. They also appear to be able to set the type of device they are talking to (victron, growatt, ...), using the lcd screen. (I do not have said battery yet, but am considering getting one). There are various posts out...

Victron sells "Wireboxes" for some of their MPPT Solar chargers, to cover/protect the wire Terminals. I know it would be nice to have them sold *with* the MPPT, but I understand not everyone wants or needs them, and for some I suspect it comes down to compliance issues or just aesthetics...

Hi, I am considering building a solar system for my barn. I am currently concerned about the distance from the panels to the charge controller. The ideal location for my solar 'stack' (MPPT, inverter, batteries) is in the tac room, (walled off, dry room for gear and storage). This is on the...

Hi, I am considering building a solar system for my barn. I am currently concerned about the distance from the panels to the charge controller. The ideal location for my solar 'stack' (MPPT, inverter, batteries) is in the tac room, (walled off, dry room for gear and storage). This is on the...

I am building a Solar system for a barn to provide power for network gear: camera to watch animals, lights, and occasional small AC tool use with an inverter. Previously, I had set up a single 30W panel on a chicken coop with a small battery and PWM SCC to run LED lights to keep the chickens...

I will be in need of a 48v to 12v buck converter when I build my 48v system. Here is an example of one (Not recommending it, just pointing one out): https://www.amazon.com/BIRITALO-Waterproof-Converter-Regulator-Golf-Cart/dp/B0BD8WDX7V Does anyone know of one that is UL or ETL listed? What...

I was watching Andy hook up a two port can hat to his Raspberry Pi acting as a Cerbo: And it got me thinking. What if I hooked up two battery banks, one with it's master BMS on can0, and the other bank's master BMS on can1. Would VenusOS see two banks? I know DVCC would be a problem, as DVCC...

Instead of going through an inverter and using a standard ethernet switch with PoE that you can get at a big box store, I was thinking of using one of these DC powered network switches: https://www.antaira.com/products/Unmanaged-Gigabit-PoE/LNP-C500G or this...

Today, I connected to my Victron 150/35 MPPT via Bluetooth and Victron Connect. It indicated that it had a Bluetooth update, which I completed. After restarting VictronConnect, it now said it had a firmware update. Being bold, (foolish?), I let it update. So far so good. But later in the day...

Hi I know that in many places, we are told to always power up the charge controller with a battery first, before connecting PV panels to it. Ok, that makes sense, and I understand why. My question is, what happens in a running system when the battery dies or is otherwise cut off? The charge...

Twice now, since I started my system, the Solar Charge Controller, "PV Charger" in VRM, has 'disappeared' from the VRM screen, then returned shortly thereafter. The SCC is a Victron 150/35, and is connected to my VenusOS pi by a genuine Victron VE.Direct to USB cable. The "Device List" in VRM...

Since commissioning my system, with a 48V Multiplus II 3000 VA (UL) and a 48V EG4 LLv2 battery (for power in a barn), I noticed that VRM showed that I had about 10 High DC Ripple warnings, all of which fired for only 21 or 22 seconds each. No BMS warnings/errors at those times. Most of these...

Question: Are the busbars (for circuit breakers or fuses) included with the MNPV3 and MNPV6 from midnite solar 'free standing' and only inserted into the circuit breakers/fuse holders, or are they mounted to the back of the box? I may want to move the busbar to the left or right to install a...

Anyone have experience with this battery? It is a wall mount unit. It says it is up for UL soon ... And it says the BMS communicates with a variety of inverters, including Victron. Same BMS as EG4LLV2? https://sungoldpower.com/products/5-12kwh-powerwall-lifepo4-lithium-battery-sg48100m Thanks.

I was planning to use an MNPV3 box as a DC disconnect instead of a combiner. . This link: https://www.midnitesolar.com/pdfs/frontBack03.pdf Says that 'a single 300VDC breaker ... may be used as a disconnect'. The only ones that several vendors have available are the mnepv30-300, which appears...

NEC 690.8(B)(1) has the following exception: Exception: Circuits containing an assembly, together with its overcurrent device(s), that is listed for continuous operation at 100 percent of its rating shall be permitted to be used at 100 percent of its rating. This appears to be an exception to...

I have a Multiplus II 3000/48 UL. I have assistants setup to ignore AC input above a certain SoC, and to not ignore AC input below a SoC level. Say, 80%/30%. This all works as expected, and the AC in runs the loads when SoC is below 30% and battery runs them again when SoC is above 80%. My...

I am in the processing of designing a system. A question about AWG for wires: The battery I am considering has 100A max continuous discharge (with a recommended of 20 to 30A). I certainly don't plan on using 100A continuously, but should probably fuse the system for that just in case. (Or a...

Let's say I am about to lay 30ft of RMC (Rigid Metal Conduit) underground between a ground mount array and a disconnect at building entrance. RMC conduit is threaded at the ends. Threaded couplings are used to join the sections. RMC is considered good for underground > 6 in. per NEC. What...

Quick question regarding battery chargers. Let's say I am charging a 24v battery with a victron IP43 or IP22 charger at 16amps. I am wondering how many amps from AC the charger will pull, on a 120V AC line while charging I think that at 24V and 16 amps, the charger on the DC side will use 24*16...

The MIdnite breaker poster shows, that the MNEDC breakers are non-polarized. However, the schematic for one of them clearly shows "LINE" and "LOAD" sides, as well as the sticker on the side of one showing the same. So which is it, are the MNEDC breakers non polarized, or polarized? Or do I...