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Finally after 18 month I've completed the installation of my DIY off-grid system. It was an incredible amount of work, much much more than previously expected. Tomorrow will be the final inspection of the cities building division and on Friday the inspection of the power company - I'm very...

I had bad flickering LED's on one of the two phases. After a couple of days/weeks searching the cause of the problem, I finally found it. Environment: 6x EG4-6500 in split phase, batteries only (no solar so far) I've checked/tried everything like checking for N-G-bonding problems parallel...

I’d like to share my findings with you so you may not run into the same problems. After trying for quite a while, I finally have reliable communication between SolarAssistant (SA) and all inverters and batteries. My setup: 6x EG4-6500EX-48 inverters in split phase 3 inverters per phase all...

I would like to share my experiences in finding the right black/dark start UPS for a solar system. It might be helpful for someone to avoid making the same mistakes as me. First, you only need to take care about a dark-start situation if you have some sort of emergency shutdown relays or...

After some research, it looks like that the problem with LED pulsing/flickering is well known. It's seen on nearly all brands and models of HF pure sine off-grid inverters. I'm trying to fundamentally understand the problem and find possible solutions. Here are some of my thoughts. Let's...

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...

Finally I've got the first strings installed and had a nice 100% sunny and cloud free day behind me (max. ambient shade temp was about 33°C). Here are the diagrams: I wonder why the voltage dips (so much) while the current gets higher. I know about Ohm's law but my wire distance between...

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...

Hi, I'm trying to find a "clean" solution to remote shutdown my parallel EG4-6500EX AIO's (e.g. in case of an emergency). I've already installed contactors/relays to shutdown the whole system by disconnecting all possible energy sources of the AIO's (AC-in, batteries and PV via Tigo PVRSS) in...

I'm in the final phase of my DIY project (off-grid AIO's but grid as backup if required) and the inspection will be in about 4 weeks. Now I wonder if about the max. allowed solar battery capacity and how accurate an inspector may look about the 20kWh per ESS unit limit. The EG4-LL-S battery...

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...

Just found a new firmware but no change log (just 2 days ago I've just updated my 6 inverters to 79.63 :rolleyes:). Any ideas about what's changed in 79.66?

HI, I've tried to find out the current code status situation, but I'm a bit lost. Environment: Attached RV garage to a single family home (house/garage built 3 years ago) The RV garage is air conditioned. The batteries are in two separate server/battery racks (max. 6 batteries each) with a...

I wonder what happens in detail just at the moment when a typical off-grid inverter AIO device like EG4-6500EX will be connected to the grid via AC-in (at the moment when the AC-in breakers are switched on - all at the exact same time - while the off-grid inverter is still running in inverter...

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...

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, I've ordered 9 EG4-LL V2 and 2 EG4 6-space server racks by end of November 2022. After delivery, I've noticed that both server racks are different models. One has a yellow EG4 logo and busbars covered with cable channels, the other has an orange EG4 logo and no cable channels and they differ...

Hi, until now, I've seen the following possible AIO (EG4-6500EX) modes in Solar Assistant: Solar/Battery Grid Standby Power on Fault These modes are shown in the Solar Assistant Dashboard view, in the inverter details view and these states are also transferred via MQTT. Is it possible to...

Hi, I wonder if the EG4-LL (V2) still has the pre-charge resistor and if it does, is the procedure the same to activate it like in the EG4 LifePower4? I found Signature Solar videos about the correct pre-charge cycling of the EG4 LifePower4 battery, but NOT for the EG4-LL (V2). Also, in the...

Hi, I'm using 8 PV strings connected to 8 individual MPPT chargers and I think about to protect the MPPT's against surges with SPD's. I'm pretty sure, it would not help against a direct lightning hit, but maybe against a lightning strike near by (all strings are correctly earthed). Because I...

I was thinking about whether you could build an AFDD and GFDD detector yourself that is contactless and only operated using a current transformer (this is only about detection, not circuit disconnect after detection, so no AFCI and GFCI devices). After some research, I found the MNHBB-AFGF...

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'm curious if it's allowed to use THHN 600V wire (10 AWG stranded) from the PV DC breaker box (which usually is located just about a feet below the inverter) and the inverter PV input terminals. Typical PV wire (1000V) which is UV resistant for outside usage is very inflexible and runs usually...