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OK so I just this weekend installed a Watts247 8 in / 2 out combiner Specs - 15 amp fuse on each of the 8 input string - 63 amp quad breaker on each of the 2 output groups Doing Some Temp Testing of this box now that it is installed Here is how the panels are connected The panels connected...

In the past year I purchased 2 of the 4/2 combiner boxes from Watts247. System has been up and running about 5 months. - Array is an 8s4p 365 watt panels - Goes into 2 Watts247 Combiners. 4s into 1, 4s into the other - 2p comes out of each, and Each of these 2 go to the Growatt AIO and SCC...

I searched and could not find much info about comparing these 2 devices. Are they TOTALLY different? My understanding is the MN SPD is probably not fast enough an EMP , but would the EMP Shield work as an EMP protection device (as it claims) AND a surge protector like the MN SPD?

I am trying to learn my actual State of Charge of my battery bank. I'm not totally new at all this, but still learning. I'm not sure what I am seeing in my Shunt Percentage vs Cell Voltage of my battery bank. I have a 24v system with a Schneider SW 4024 Inverter, two Classic 150s SCCs, and a...

THREAD INDEX: (Links Updated: 2/15/2024) This is a long Thread, So I have added this Index Note: Click the Post Number to Follow the link. The Topic discussion will follow from that Post TOOLS USED FOR DIY A/C INSTALLS Tools - 662 THE INSTALL General 1st 24k - 5 2nd 24k - 6 12k - 139 Nitrogen...

I'm adding another string to each array. Which means I will out grow my 2 Midnite Solar 3 sting combiners. I'm upgrading to a Watts247 8/2 combiner Problem is, all PV wires (strings) go into conduit and into the attic and into the MS combiners. But with the the addition, the existing PV wires...

OK ... So I waited until this issue was fully resolved to give me thoughts. And now it is ... Most People do not share their success stories, so I wanted to give a thumbs up to Signature Solar for this resolution We purchased a Growatt 12kW SPF 12000T DVM MPV 250voc from Signature Solar...

I'm finishing up my build of my newest battery. Trying to understand how many Amp hours I got here. If I build a 2p8s battery from 16 304 EVE cells, is that considered 608Ah's? I think that's what it is? Is that correct? And so, if I currently have... A 2p8s battery made of 16 230ah...

OK ... so not exactly Math ... but I have 2 Arrays of 9 panels each. Each array has 3 strings and each array of 9 has its own Midnite Classic 150 Charge controller. My System voltage is 24v I want to add 2 more strings of 3 panels each string. 1 additional string of 3 to each charger ... a...

I have to stay in a Single Series String to keep the Array amperage in spec for the project. But .... If I install the array with all 6 panels facing the south direction, the lowest 2 panels will be in the shade part of the day. Panels REC TwinPeak 2 Rated Power: 375W Open circuit voltage...

Just got an email saying Docan has the Seplos Mason boxes selling them with or without cells. I was guessing they were not assembling the ones with cells, but it was interesting too me as I am about to start another project and might be building up a Dual XW Pro system with about 30 kWh+ of...

I'm tinkering with the production of my 2 arrays - System is 24v with 2 arrays and 2 Classic 150s - Array 1: 9 REC 285w panels / 2565w total 3s3P / VOC 38.4 or 115.2v array input voltage to SCC #1 - Array 2: 9 REC 290w panels / 2610w total 3s3p / VOC 38.6 or 115.8v array input voltage to SCC #2...

Today was cleaning, feeding and care day in the hydro garden . Got everything dressed up for beauty shots. This little hydro system keeps the wife and I in salad and greens 3-6 days a week. All we want. I harvested 3 stuffed grocery bags off it Monday ... Cut all these lettuces to nubs, and...

I have 2 48v 280ah DIY batteries. System has been up and running for several months no problem. The entire system (except Solar panels) is mounted in a cargo trailer and today, out at the farm, them moved the trailer. After powering everything down, moving the trailer, then powering...

I go to the dentist for a cleaning twice a year. I think I my teeth are clean, but apparently not. I top balanced my EVE 230 x2 and Calb 280ah x 1, 24v LFP banks 18 months ago when new . They seemed to stay pretty tight, but recently have started to drift above 3.45v per cell. How often...

I have 2 of these Watts247 4 in 2 out Combiner boxes. Because of endless trouble I've had with a Growatt SC48120 charge controller, it may be necessary to switch to another brand of SCC. I built the system around the idea of 2 arrays going to the 2 mppt trackers of the external Growatt...

Just got my Rosie Beta Tester email. Problem is I do not need just 1 Rosie at 7kw, I need 2 with the option to go to 3 or even 4 stacked. Any one know if the Rosie will be stackable? I'm Looking thru the documentation now, but not seeing a reference to adding more yet.

I need to make 110 ft runs from my panels thru my roof opening and to the combiner. Is there any problem with placing an MC4 connector just before the roof entry / junction box, or should I go for a continuous run of 10 awg solar cable? There will already be 1 MC4 connection at the panel so...

Bulk / Absorb set to 55v , but the Growatt SCC would reach that and just keep going up. According to the Victron Smart Shunt there is no current, but voltage got up to 58.9 and the BMS (Heltec 200amp 16s x2 ~ 16s2p) shut both batteries banks down. But I do not understand why the SCC voltage...

I saw something like this in a recent thread, but I think the OP said it had to do with charging and I did not want to hi jack the thread. Here is the scenario, - JK/Heltec 200 amp BMS with 2 amp Balancer - Growatt 12kw off grid inverter - 16s (x2) EVE 280 cells = 48v - SOC is about 78% -...

I have seen where other people have had some trouble updating the firmware of the various Growatt units. What are the Pros and Cons of updating the Firmware? (other than the obvious “when you update you have the latest greatest”).

I have purchased a Growatt SPF 12kW 250v DVM MPV and an extra external SCC, the Growatt SC48120-MPV. Both are rated for 60-245vdc input from the solar array. Today I powered up the whole system (12kW, SCC and a small test Solar Array) for the first time. Everything seemed to work Fine at...

I'm using 6 Awg SOOW cable for my AC electrical connections in my mobile cargo trailer build. Was going to use MC, but I thought the SOOW looked clearer. Problem I'm having is connecting the fine stranded 6 awg wire to busbars and screw terminals. When the screw bites, some of the the wires...

I am installing 32 280Ah EVE cells in a 16S2P configuration. I have 2 225 Class T fuses on each battery bank wired to the parallel basbar with 2/0 wire. From the busbar I am running 4/0 to the inverter. I will be installing a Marinco Dual Bank Control Switch with a precharge resistor. The...

Installing The Big Growatt SPF 12000T 12kw Inverter into a Cargo Trailer for a 12k watt mobile power generator. All the panels will be installed on a pole/post barn and I will connect the Inverter's Solar Charge Controller MPPT to the panels via 8 awg SOOW cable and Anderson Connectors. First...

Ok, so back here I built a precharge resistor setup with push button start for my Schneider SW inverter. I used a 100w 50 ohm resistor. But it seems improperly sized as the inverter goes into a surge and blinks on and off if I hold the button more than a second or 2. The SW is trying to start...

1000 Posts !! Who Cares Right? I must ask too many Questions, because I surely do not have that many answers. Thanks for all of you who have put up with me this long and thanks for tolerating my Posts Filled with obvious questions and occasional thread hijacking (hey it happens to all of...

I had a few little extra pieces of shrink wrap so I decided to wrap the tools that I commonly use around the Lifepo4 cells and terminals. Large heat shrink on the sockets A piece of heat shrink on the metal section of the torque driver And a composite ratchet round out my safety pieces I used...

Been working on it and planning it for a while. And it just so happened to work out that the day I actually finished the job was also my Birthday ... today ? I have a single Midnite Solar Classic 150. For the past four years it has been just fine with a MS Classic Sizing Tool sized array...

I would like to run a Mini Split in my bed room as a supplement to my 3 ton and 1 ton systems, but run the mini split off grid. Space too cool for the mini split = 285 sq ft. So 9000 btu would be about right. Needs to be Cool and Heat so looking at Heat Pumps. I have been running a gird...

We have kicked around over paneling the Growatt 12kw 250vdc and it seems from many discussions, that it is not advisable. Might could get away with maybe 20% over, but in the end we decided it is not worth it, so we decided to just add a second 250v SCC. I had found an 8 string input, 2 output...

I built my lil off grid system to assist my grid powered house 4 years ago. At the time People asked me was I was "Crazy", "You Need a Sanity Check", "Why would you build an off grid system for your house if you are grid connected AND your cost per kWh was about $0.11" . I was told I would...

I was thinking about some of the larger (like a Growatt 12kw) AIO inverters/SCCs. The low frequency ones I've looked at seem to have pretty high idle consumption. (75-150 watts just being on, not in power saver mode ~ depending on who you ask) So if lower idle consumption is your thing, I was...

My present array was designed using the Midnite Solar sizing tool and pretty much maxed out 1 Classic 150 scc. Midnite Solar has assured me there is no problem over paneling the Classic 150 even doubling my present size, the excess power will just be wasted. Overpaneling will help (I believe...

I have read everything I can find about roof top panel grounding. I have watched the Mike Holt video several times. I have read conflicting interpretations of the video and of roof top panel grounding in general on different forums. Owners manuals from Schneider and Midnite solar are also...