Search results

SCE posted the data from yesterday. My estimate was very close. Here is the graph. You can see my only consumption was the 600 watt hours in the 8 pm hour when we tested the EV charging. I easily offset all of it in the 4 pm hour and netting almost 15 KWHs of export still. Obviously, I would...

We did a little experiment today. When my brother got home from work, he brought over his Bolt EV and his Charge Point Level 2 EVSE. I wired up a plug for it and we set it to charge. Only issue is, he didn't have the App setup for the EVSE so it was set to 30 amps. With only my one XW-Pro, I...

The last few days have been excellent production, but I have nowhere to send all the power. The Victron is going into float about 1 pm and throwing away half it's possible production. Here is the battery voltage graph from the XW so far today. It's kind of hot today with intense sun, so I am...

Here is a screen cap of the page I did it as a thumbnail, I think when you click it you will then get full res.

I think you are onto something here. It sure would be nice if the system would log when these actions happen. Then we would know which one caused it. The other thing on this page "Freq-Watt P(f) Droop" that is a bit scary to me is the "Ramp Rate Increment" at 33% per second. I slowed that to...

The additional problem is that you can't tell if/when you have enough solar coming in to switch the Powerwall back on. The AC coupled solar is dead, no matter how much sun there is, until the Powerwall is producing a good local grid for over 5 minutes from the remaining battery power. My...

Sorry for this fairly long post, but I have given my similar situation some thought. The issue here is called "Dark Start" and it is a problem with all AC coupled systems. In my case, I have a Schneider XW-Pro instead of a Powerwall, but it suffers a similar issue. The best way to deal with it...

If you only connected L1 and L2 with no neutral, I would expect the XW-Pro would never qualify the input as good power and it would leave the input contactor open, the neutral connected to the transformer center tap, and it would stay running off grid. And in that case, it would not be able to...

Yes to both. This function is required in the way the XW series operates to allow both on and off grid operation without fighting the neutral balance. No matter how the system is operating, only a single Neutral / Ground bond is required and there should never be a second one and there is no...

The way the relays in the XW+ and XW-Pro appear to be the same. There is no setting to change how it controls the relays, other than some timing settings when using multiple units and/or and external contactor. The contacts that are open or closed in each operating mode are always the same. The...

I only have a single XW-Pro running as "Split Phase Master" but the idea is not that different. All of my neutrals tie back to my main grid panel, if I am running on or off grid. And the neutral bar in my main panel is directly bonded to ground at all times. The transformer in the XW-Pro has a...

Today was productive. The battery was fully charged before noon and the house was running totally off of the Enphase system. So I took the opportunity to shut down the XW and finally move the DC wiring into the new breaker panel. The box filled up. I had to bend the terminals going into the...

I looked at the other thread. A while back I did the same math and figured it would not fail in a bad way, but the batteries from the 2 banks will not share the current. It was noted in the other thread, so I will just keep my comment short here. During discharge, the NMC cells will provide...

Are you going to swap from the NMC cells to LFP? I could not find a voltage range to make them work well together.

I got 2 pics from the outside which sort of show the way it sticks through. The inside pics didn't show anything. It comes with that bracket system with the legs against the wall, but it really needs a thicker wall, I have it on the setting for the thinnest wall and it just made it. I had to...

Midea seems to make good stuff. I'll watch to see how your setup holds up. I also looked into the twin hose models, but ran into similar issues like you have already reported. I am curious because I just bought one of the Midea "U" 8,000 BTU units for my upstairs room. I used a cheapo standard...

My original thought was to have the hot water line from the main water heater go to the inlet pipe on the electric one. They typically feed into the bottom of the tank. The hot water then comes out of the top of the tank. If I do use up the 10 gallons, the cold water coming in will drop the temp...

I have thought about that. Two of my bathrooms are at the far nd of the house from the 40 gallon gas water heater in the garage. I have thought about adding a 10 gallon electric one in the attic by those showers to get near instant hot water at that end of the house. The nearly 80 feet of 3/4...

I was out of town for work for nearly a full week. I was only a little closer to the Eclipse though. It was still only about 50% cover. While I was gone, my system ran perfectly. Only odd thing is 2 more of those odd oscillations where it swings between charging and discharging at fairly high...

Here is my production graph from So Cal. Well out of the total coverage area. The power cut to about 50% on a totally cloud free sky.

Production is basically done for the day. It looks like I pushed about 2 KWHs from the DC system out to the grid. That made just enough room in the battery that it kept the DC system in Bulk charge the whole time. The 4.8 KW Enphase system did great, pulling in 28.3 KWHs. That is just shy of...

We had 2 days of poor production, and my battery got down to 51 volts, I have it stop grid support at 50.5, so it was about as low as I normally go. The... For over 20 minutes before 6 am I had another one of those events where the current oscillated from charge to discharge. I really think it...

PV solar power does not really work like that. The amount of power coming from the panels is constantly changing with the amount of sunlight that is hitting the active surface. Here is a plot from my Enphase system. The Enphase system only plots the total in every 15 minutes, so it looks...

I just found these on Amazon. They would probably be great for what we do under 100 volts...

Mine are over 20 years old. They are below the "Class 0" electricians gloves. Mine are probably rated to just 500 volts, but thy bend easy fo working on small stuff. These are about as close as I could find. https://us.misumi-ec.com/vona2/detail/223007330796/ Those are for working on up to 750...

Here is the line I used for my DC breakers...

Not always. It is very possible for the inrush to fry the MOS FETs. And in many cases, when they fail, they can fail in a short circuit. The BMS is a small computer that is running instructions. It has to measure the overload current and then react to it and then try to turn off the FETs. Each...

Many of the "Server Rack" style battery units do have a pre charge circuit. If your battery has it, it will be clearly mentioned in the instructions. On some of them, you have to put the BMS in a standby mode, turn on the breaker, then when you take the BMS out of standby, it will current...

I am commenting here mainly to follow where this goes. I would like to add Arc Fault to my DC array at some point. It is not technically over a living space and it has all the other protections. I am surprised that no company has produced a reasonable stand alone arc fault protection box for DC...

I'm done. I am now ignoring this thread. You can't possibly be this bad at simple electronics and logic. I think you are just fucking with us at this point. BYE!

The BMS you showed in post #106 is for 3S NMC cells. That won't work with LFP cells. NMC cells are 3.6 or 3.7 volts each and can charge to 4.2 volts. If you used that on an LFP cell it will be ruined as LFP cells are only 3.2 volts nominal and have a maximum full charge voltage of just 3.65...

We are now 2 weeks into the next billing month. Things are looking good, even with a few storms moving through. Here is what So Cal Edison is reporting so far. I made it through the stormy weekend on the 24th without using any grid power, but on the 30th, I did end up net importing 0.92 KWHs...

There should be a fuse between the charge controller and the battery. It should be the next standard fuse large than the charge controller rating and the wire should then be chosen to handle the fuse current or higher. For a 30 amp controller, use a 32 or 35 amp fuse. Then use #8 awg or thicker...

Also get a BMS to connect to those cells. Without a BMS you are near certain to ruin those cells as well. Can you see links to Amazon there? Here is a Daly 100 amp discharge, 50 amp charge LFP BMS for 4 cells in series. Here in the USA it is $37 USD...

Many UPS units use their small battery as a limiter. I don't have a link right now but I remember a thread where a guy wired a 100 amp hour deep cycle RV battery to a cheap UPS. It was rated at something like 300 VA or watts and 15 minutes of run time. For a UPS, that is enough time to safely...