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I'm thinking about how to protect my appliances in case one or more of the MOSFETs/IGBTs in the H-bridge break and there is a continuous high DC voltage at the AC output of such an inverter. I've already installed AC surge protectors on the AC-out of the inverter to just protect AC surges. But...

Just an update about insurance. Today I've informed my property insurance company (by phone) about the installation of the solar system. The only one question the agent asked was, "how many panels are installed on the roof?". I told him 40 and he told me the re-building costs of the house will...

Another fire because of a home-made solar battery. This time, on the popular holiday island of Rügen in Germany, €300,000 structural damage (the link points to a German news story and may be translated online). Until now they don't have more technical details about the DIY battery - but there...

Yes, this is an important factor. In my case I feed 12 EG4-LL batteries and the PV charge current of all AIO's in parallel charge at a max. of 0.2C (after conversion losses). I don't want to charge from grid, so I've reduced the grid charging current to the minimum possible value of 2A per AIO...

I know, but for my feeling, it's unnecessary high. After a bit of research, I've found that the EG4-LL (V2) and EG4-LL-S will start balancing if cell voltage >3.4V and cell Δ >40mV. In my situation where I got nearly every day full sun and recharge to full capacity (which resets my BMS SOC...

I like it a lot - much easier maintenance! In which CAD software have you created the model? Maybe you can share the files?

Not 100% related to solar, but interesting to see the power factor diagram related to the load over a typical day (it influences at least the required power capabilities of the inverters - e.g. a power factor of 0.5 requires the double amount of current from the inverter to fulfill the required...

Yes, this is the difference e.g. compared to the "old" EG4-6500EX which is able to drive the load in parallel from grid, PV and battery - it's documented as "...Utility energy will supply power to the loads at the same time" for all three working modes SBU,SUB and USB. Despite it I was able to...

I don't have issues with this magnets and I'm pretty sure that there is no magnetic sensitive electronics behind this location.

It's nice to see that the forecast calculations I made about 2.5 weeks ago are almost exactly the same as today's result. Yesterday was the first cloudy day since the system went into operation and because of this the batteries could only be re-charged to around 79% SOC by end of the day. During...

Very interesting reading and deep dive information (I'm really interested in these protocol things)! After long time thinking about closed loop communication and the pros and cons, I came (just for myself) to the conclusion that's not worth the effort and because of the possible problems. Here...

That's a great idea to ease maintenance! Yes, the small screws are a pain. The EG4-6500EX only have one screw per filter grille, but it's still a pain. So I followed the advice in this video and replaced the screws with a small flat magnet and it works great. Now the filter...

Yes, the equipment cooling keeps the units nice cool and so it keeps them quiet, also. I'm sure the lifespan of the inverters will be better also when they usually running cool. I'm very happy with the cooling/loudness results with the small 9,000BTU ducted mini split which does not cost much...

I have good new from SolarAssistant. I've sent them the EG4-LL (V2 and S) protocol spec and they asked me to grant admin access to my SA instance for further analyzing. So it seem they are willing to find a solution and/or extending the number of available battery data requesting from the batteries.

I forgot to mention, I've bought from Windy Nation but everything via their Amazon offers.

I've bought all my solar cable and copper lugs from them (for a huge system). Everything perfect, not even a small complain.

Nowadays it's possible to do this even with an off-grid system - just oversize all components, but at least the inverter power to be able to run all high loads in parallel! Is it necessary? No! Does it make sense? Maybe? It's just a convenience thing! Why should I make compromises with the...

I've send SolarAssistant a feature request to read some more data from the EG4-LL batteries. I've sent them the protocol spec from EG4. In this spec there are three temperature registers/addresses listed: "Temp of PCB", "Temp Avg", "Temp Max" (also I've asked for the cycle count which is...

Unfortunately, SolarAssistant only showing the following data for my 12 batteries (even they are individually connected all via RS485). The header shows the average of all 12 battery temperatures, but each battery only shows one temperature at all. Looks like SolarAssistant does not request all...

That's a good idea. I will think about how it may be possible from the mechanical point of view. So far, some of the cold air from the duct outlets is already falling down on the battery racks which may help a bit to keep them a bit cooler, but a direct injection of cold air into the racks would...

Yes, this is the "not so nice" truth. It looks like this is the price I have to pay by using "cheap" AIO's and wanted to be independent of the grid. It would be interesting how the overall losses would be if quality equipment had been used (e.g. Victron chargers and inverters) - maybe 80% or 85%...

Just a short update after 17 days online: never connected AC-in to the grid until now 960kWh consumed, 1356kWh PV production results in an overall efficiency of about 71% (not really good but acceptable) about 430 starts of the 5 TON central heatpump (with soft start installed) - no failed...

Any update on this? I've checked with my EG4-LL (V2, 4-dip-switch) and the BMS tools does not show a cycle count. Does the BMS inside the EG4-LL just don't have a cycle counter or does the BMS tool just not showing it? Btw. the SolarAssistant detailled battery view does also not showing the...

This guy converted a camping bus to pure solar. He put in a Tesla model S engine and 3x Tesla model 3 batteries and added 16kW of solar panels. What a crazy project... my admiration for the guy is limitless. Here are some videos (the 2nd video is more in technical detail and it's in french but...

Me too! Bought 6x EG4-6500EX, 12x EG4-LL batteries and 40x PV panels (end of 2022). They sent me, by mistake, two different types of 6-slot battery racks (one orange one yellow) with some differences in detail and they send me an additional orange one without cost to solve this. Absolutely no...

Great explanation! Thanks for sharing!

Sorry, it's a little off-topic but at least related to solar driven appliances. I made the following (strange?) observation. Our cooktop does not heat up linear to the specified target temperature (it's a ceramic 4 burner from GE not inductive). Instead, it constantly (about every 20 seconds)...

I know, they could not be as efficient as "normal" modules, but as an supplement to an existing system with space constraints it may be worth to consider... depending on the price. I'm aware that from the efficiency standpoint it's not a good solution - but it may be a workaround for some...

My roof is maxed out with PV and I don't have room for ground mount. Now I'm thinking about extending something in the future by mounting some modules vertical on the house facade. The house facade is white (like most) and because of aesthetic reasons I came across the following link by chance...

Hi @Markus_EG4 I'm using 9x EG4-LL V2 (4-dip switch versions) updated firmware from original Z01T4 to Z01T13 some month ago (ordered 11/2022). Added 3x EG4-LL-S running with original firmware, but don't know the version (ordered 10/2023). By intention, the btteries are NOT communicating (no...

I was a bit imprecise with my question. I'm interested in how much of the total AIO's idle consumption will be drawn from the grid in case the grid is just connected via AC-in. In case of my six EG4-6500EX all are drawing 93W idle power. If the grid is not connected, the 93W are drawn from the...

In the current manual of the EG4-6000XP there are different values compared to the video. It looks like EG4 updated the manual since Will's video: IDLE CONSUMPTION (STANDBY) w/ PV (<30W) | w/ Battery (~50W) | w/ AC (<50W)* So this seems close to what the EG4-6500EX is using when AC-in connected.

Thank you

Just curious (I don't own the EG4-6000XP), has someone ever measured how much power the 6000XP draws from the grid if just connected the AC-in with the grid at idle - even if grid is not used, just connected? I'm using the EG4-6500EX which has an idle usage of about 92W. It draws about 50W from...

Update: 8 days in a row with 100% sun, no clouds, 660kWh PV produced (and consumed) still no issues :) first time using my 3D printer and even here no LED pulsing/flickering if the printer is running (I had this previously in some tests) tuned the smart home rules again to control the AIO...