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I have a similar setup and it seems to be working fine, the inverter sees all the batteries etc. Maybe there is noise on the communication wire, but I'd speculate that the data rate is low and so not susceptible to low level electrical noise. BTW just in case you run into this like I did: the...

Ha, I emailed SS customer service literally 5 min ago and they already processed a replacement... on a Saturday. So props to SS for an exceptionally speedy response.

It was a single credit card charge which was finalized when the batteries shipped, and in fact even the credit card bill has been paid off at this point. 95% of the cost was batteries so the single charge is not a big deal, it's more of the feeling of being in limbo and wondering if the date...

Double throw switches are expensive and also big, for sure. Here is my system using the feeder tap schematic as recommended for inverter+battery... switch is almost as big as the 18kpv :-/

Please clarify: you have a 200A main breaker on the load center and you are going to have the 18k supply the load center? Are you planning to do this by having the utility power go into the Grid side of the 18k and the Load side of the 18k goes to the 200A main breaker on the load center? Or...

I am frustrated with how Signature Solar is handling the backorder of EG4 battery racks. I purchased a bundle that included racks and batteries (which appeared to be in stock on the website at the time of purchase), and everything arrived except the racks. I looked at my order status and it...

Does anyone know the specs on the 18Kpv's factory installed fans? The manual indicates they can be removed and replaced if needed, and given how loud the unit is I'd like to replace them with better behaved fans with similar performance. My unit is indoors in a climate controlled room @77...

They do have some kind of ramping profile since I can tell a difference between the fans at 5kW draw and 10kW draw... I'll check the firmware version tonight.

You use the inverter to battery cable to connect the hub to the inverter...battery end plugs into the hub, inverter end into the inverter. Then you use the last "shorty cable" to connect the battery chain to the hub... or you can use a standard ethernet cable. How many racks/batteries do you...

Perhaps it's the wrong cable, does not match that color scheme.

I am trying to update the firmware on my communications hub. I purchased the update cable from signature solar, it is labeled as an RS 232 cable which is apparently a slower cousin of RS 485. I plugged this cable into the USB port on my computer and the RS 485–3 inverter port on the hub. When I...

Two dedicated AC combiner boxes are in the recommended configuration for running two EG4 18Ks in parallel. This seems to be different from a PV combiner box which I think operates at lower voltages. Is this just a box containing taps to split the 120v P1 and P2 on input side, and another box...

Actually I looked at the cable specs on the SS website and RJ45 pins 1,2,8 are assigned to Rx, Tx, GND which seems correct. Maybe 232 is the problem...

I had tried different baud rates but had not tried w batteries, only the hub. Will try and report back. Thanks for helping out btw

Charging based on SOC, Stop AC Charge Volt is 56V

In the diagram that is not the two throw transfer switch, that is the fused disconnect for the solar array

Hi there, wondering if it's possible to set up a battery and inverter to act as a whole-home UPS (power conditioning and bridging for short blackouts), but also to time shift by charging at night and discharging during day. In my area there is a ton of wind power with excess production at night...

There are no safety improvements or anything like that? It's just bug fixes?

It can take 3/0, see pg 17 in manual

That is normal sound behavior for my unit. Is your 18k indoors or outdoors? In a climate controled space or not? The existing fans are overkill because they have to cover all applications, they are NMB 08025VE-12P-GLD weatherproof fans, I believe IP68. They run at something like 7000 RPM and...

Thanks for the info all. I may start with backup and add capacity later to try shifting. A/C is the biggest draw but I replaced my units a couple of years ago with a SEER 28.0 model so it's not terrible...

Actually I just tried and it did not work with a single battery set to dip switch one... perhaps the cable is bad

Thanks for the reply. The wiring diagram is where I saw the Combiner Panel, see attached. I will contact EG4 to ask for an explanation and/recommendation.

If I install an EG4 18k in hybrid as a battery backup and timeshifting device, w/o solar, is a rapid shut down necessary? Intuitively it seems like you would want first responders to be able to shut down the inverter along with the conventional service connections, to prevent the inverter to...

Great, that helps a ton. Last question: do you have any breakers upstream from the 200A load box? Like is there a breaker outside on or next to the utility service, that when you flip it cuts all power to the load box? Or is the 200A breaker in the load box the only breaker between meter and you?

Can you stack an EG4 3 slot battery rack on top of an EG4 6 slot rack? More specifically can the busbar of the 3 rack be connected to the busbar of the 6 rack, which is then connected to the inverter?

I believe you have only two choices given those parameters: 1) you can use a supply side tap which will require the utility turning off the power while you tap into the lines from the meter, see the supply side tap w whole home backup diagram in the manual. 2) You can install a 200A breaker...

OK I have realized that although I ordered this: https://signaturesolar.com/eg4-usb-read-write-cable/ I was sent this: https://signaturesolar.com/eg4-rs232-firmware-update-cable-ll/ thanks for trying to help everyone, I have contacted SS to get the correct cable.

Yes you can connect grid directly into the inverter Grid input and connect inverter Load output directly to the 200A breaker in the load panel. The only problem with this set up compared to using taps/splitters is you cannot easily bypass the inverter in case of an inverter malfunction or...

why are you hooking the grid side of the inverter to the main load at all? What you describe is a circular path... what is your overall set up in terms of solar, battery, generator, grid?

Thanks. However I'm unable to find the Amp rating for the EG4 battery racks anywhere... anyone know what it is?

Battery voltage high error I have an EG4 18k with 12 LiFEPower racked batteries and the independent battery controller module that came with the package. I charge from the grid for free at night and discharge during the day with peak shaving set to ~100W to prevent grid backflow. Occasionally...

OK no problem just wasn't sure if I was missing something. But what are the components in your set up? Grid or grid-less, solar or no solar, battery or no battery? If grid, what Amperage is your service? Inverter covering all loads or critical loads? Etc. Would help us to know those