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I want support to connect to multiple Batteries My battery bank has 4pc EG4LL with LCD batteries and 2pc EG4 LIFEPOWER4 without LCD. I can connect to the EG4LL or the LIFEPOWER4 but not both at the same time. It would be great if we could pick multiple batteries on the configuration page.

Changed that, but still no luck.

I can not find the "easy:)" part! I get "access denied" Here are my edits, what am I missing? I edited /etc/pam.d/common-auth as described. modified shadow modified sshd_config

After using dd to put the solar assistant image onto the onboard mmc drive on the pi's board. I powered down the unit and removed the sd card. I cannot get the pi to boot using it's internal drive.

Thank-You Crowz I will give it a try.

Here is the reply that I got from Solar Assistant Support.

Can a Realtime Clock, be added to a Rasberry Pi that has Solar Assistant installed? My solar system is offline (no internet), After a power loss I need to remember to go to SA configuration page and reset the time. If I forget to do this then I may be overriding old data with new data and I...

Do this test with them daisy-chained, set all batteries dip switches to 2, then turn on each battery individually, and use Solar Assistant to connect to each individual battery. If this works then you know your daisy-chained communication cables are good.

I have this LifePOWER4 version of the EG4 batteries communicating with Solar Assistant, I connected multiple batteries just like your picture shows. I would guess your dip switch setting is not correct, remember after changing the dip switch, you need to power cycle the battery for the new dip...

Will the EG4 Inverter communicate with Solar Assistant? Why do you want battery to inverter communication? Solar Assistant can get more detailed info by communicating both with the Batteries and Inverter, than getting just the info that the Inverter collects from the battery (i.e. Battery Temp...

Are you running the Cotek 24V 3000W inverter off of the same "one EG4LL 48v battery"? My experience is, that you need a minimum of 2 or 3 of the EG4LL 48v batteries to start a high surge load. The battery BMS has short circuit and overload protection built-in, when it sees that high surge it...

Will you share the new firmware, please? Also, do you have a link to the driver for "Exar Corp (xr21v1410)". Thanks,

Can you use the dry contact built into the inverter? see attached.

This feature would be great on Off-Grid installations, Back-up generator would only have to be big enough to charge batteries (80A). Instead of powering all loads and charging batteries.

You are right, I did not consider that the current needs to flow through the transformer to trip the breaker. I edited my post above.

I believe if the fault to chassis or to the electrical box happens after the breakers in "AC in panel" then these breakers will protect it. But if the fault happens on the wires leading from meter to AC in panel then there is no ground fault protection. I was wrong, see @Hedges post#52 below

Shunt trip breaker results in having to do a cold start. We want to be able to auto-restart on "loss of neutral" because every time inverter transfers we will have a "loss of neutral".

monitoring a loss of power. We are only monitoring the loss of Neutral and Disconnecting the Output (loads) from the AT. AT Input will only be disconnected by Over-temp condition or OCP. Loss of power during transfer will not cause Shunt trip Breaker to Trip. how we could wire that up? Wire AT...

A shunt trip device is an optional accessory in a circuit breaker that mechanically trips the breaker when power is applied to the shunt trip terminals. The power for the shunt trip does not come from within the breaker, so it must be supplied from an external source.

Scaling up with multiple inverters in parallel. I think the GW internal ATS will have the same imbalanced load problem during transfer as the Schneider inverters had #129. So I would recommend if you want to use the grid with multiple GW in parallel as backup, then build a complete external...

What if we had an AT temp monitoring circuit that could disconnect AT input Power? "Lost Neutral fault" would not disconnect AT Input, this would allow it to auto-reset after an ATS transition. AT would be protected by OCP and Over-Temp protection. What components do we need to build the AT...

Sometimes I feel we are overthinking all this, I don't think that the inverters with the build-in transformers have this much fault monitoring and disconnects build-in. I am not trying to derail your safety circuits, just trying to keep things in perspective. Where do we stop?

In the current schematics, you guys are not disconnecting the input side of the AT, only disconnecting the loads from the AT.

When you do this remember my "burned up the transfer relay" experience. I am guessing as you scale it up with multiple GW you will end up using a bigger contactor rather than paralleling multiple contactors.

You could simplify things by putting the 240V loads on the "Inverter disconnect Service Panel" instead of having another separate Load center just for 240V.

If you reduce the upstream OCPD to 30A then you only need one "Lost N Contactor".

This reminds me of some Schneider inverters that I worked on a couple of years ago. we had 3 inverters in parallel each rated at 60A pass-thru current. We burned up the transfer relay in one of the units. After doing some research I found this document.

Why did you change your "Lost N contactor" to switch both L1 and L2 on each contactor instead of one contactor switching L1 and the other switching L2 as you had it previously? I think there is a chance that the two contactors will not disconnect simultaneously, so the last contactor to...

I think you need to use 120V coils on your "Lost N Contactors" if you plan on wiring them in series as shown on your last schematic.

This contactor may work, a bit better price. CWB50-11-30D15

This diagram looks great to me! I was planning on running the Hot wire from breaker thru dry contact instead of the neutral wire like you do, but this will work just as well. Not that it matters, but I always put my switches on the Hot wire, is there any special reason why that you are...

Connect the Red wire with "?" to your GW dry contact. You are getting really Close!

I don't think you need any Neutral wire and 'neutral switching contactor' from Main Service to Solar disconnect panel if you are using a contactor to Switch the N/G bond in 'Solar disconnect panel'. I had originally suggested having a Neural wire between Main Service and Solar disconnect panel...

I think this is a good idea. I checked and the Growatt has continuity between AC In Gnd, AC Out Gnd and Inverter case, so we only need to connect one of the inverters Gnd terminals. second contactor from main to GW inverter I believe you don't need this second contactor from main to GW...

I would agree that this may not be code correct, but I think it is a safe way of doing it because the 30A breaker for AT will prevent an overload on the AT if, for some strange reason, it is balancing loads for an external customer.