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I have an RV transfer autoswtich and when in shorepower, the neutral ground bond is broken on a 2nd set of contacts. On generator power the neutral and ground are bonded in the switch.

I'm using sunny boys AC coupled to my Sunny Island and want to feed in from a generator also. My generator is an onan RS12000 that has a microprocessor based speed control so it does not idle up to 62hz. This presents a problem that the sunny boys may backfeed the generator. I need an...

Daughter wants to move back from the big city and wants a tiny house. We've identified a spot near a pond that is about 1000' from our house. I want to run her 16x40' house with 6000xp inverter but it will require load management. I will swap her water heater elements for 1500w elements and...

I have two sunny boy inverters from 2017/2018 time frame. They both support rapid shutdown and I have Tigo TS4R-F modules. I'm testing with my panels leaned against the side of the house for now. I can select Rapid shutdown mode OFF/ON/TS4 shutdown. I selected TS4 shutdown mode and the...

Just posting this to help some one in the future. Well, Hello future person! Here's what you need to know! If your SMA Sunny BOY throws error code 6803 or 6805 you will think there's a malfunction. But that PV input will still work. You can clear the error by going to...

My solar system complies with nec2014 rules which states that the string gets disconnected on the roof and not all the panels individually. I'm about to add more strings and was looking for a SMA remote shutdown box but they (obviously) are discontinued. I was thinking I could get one TIGO...

I would like to gauge interest in a possible product. I expect that many people have built batteries and they also may have previously purchased batteries with various incompatible BMSs. So how does a person combine all these BMSs that don't necessarily network together? The Victron smart...

I'm running a home brew ESP32 that's sending the necessary SoC and battery voltage to the sunny islands to make them operate. The unit operates perfectly playing well with Sunny boys and frequency shifting. Problem arises when the battery is full. The SI would rather go into frequency...

I have duke / progress for a power company and they have my solar back feeding to the grid via a 2nd meter and then to my double lugged primary meter. I'm not sure the use for the 2nd meter as it doesn't seem to do any reporting. I'm very rural and they've switched my primary meter a few times...

Just an FYI post in case someone wants or needs to know in the future. We got a 40 gallon AO Smith heat pump water heater. It speaks modbus but I haven't dug in to it yet. I replaced the 4400w water heater elements with 1500watt elements so that even when they run it won't significantly load...

My system is grid tied so my batteries sit at what I'll call 100% nearly all the time... 3.45v per cell. So my BMS should show 100% but JK doesn't seem to recognize when a battery is full and adjust the SoC to 100%. I suspect it's a calibration issue with the in built shunt. But is there a...

I realize that victron shunt is a bluetooth device... has anyone created a widget to allow it to tell a Sunny Island the SoC?

We need about 5hp, so I thought a 240v VFD pulling a 5hp 3phase motor. Now 240v VFD internally rectifies to 340v DC…. Which is why almost all EVs today are 380v batteries. So that‘s all well and good… but we need a BMS. I know the Nissan Leaf BMS will just work if you hook it up, but it‘s for...

I've got a pair of sunny islands with AFRAENA on, so when separated from the grid, I should have freuqncy shift power control. There is no RS485 comms between the SI and SB.... Sunny island is in island 60hz mode and wired behind the Sunny islands. I've watched the power carefully on an...

I’ve just finished my 2nd of 4 batteries using JK BMS. I was reading the docs from this forum and realized that there’s nowhere to set the device number. RS485 is multi drop, as is CAN… so does anyone have an idea about setting a device ID? I guess once it streams data you can tell the...

I've just gotten my JK BMS turned on last night and let it balance some 280ah LFP cells. It did well and was balanced in a couple hours... I hooked up a 48v charger to them and now they are at 55.2v and balancing again. Here's the question.... my SoC guesometer shows 37%. How can I force it...

Does anyone know what theparamter GDAISNS does? settings are high normal medium and low. The context of my question is: we are grid tied and if the power blips for a few ms, it's enough to make the SI drop the grid. It should reconnect in 5 minutes but it sometimes does not. Actually it's...

I have an older SolarEdge 11.4kw inverter that does NOT do frequency shift power control. I’d like to upgrade to an inverter that does do frequency shift power control so I can put it behind my sunny islands. HD wave comes to mind…. Are there any other models I should consider? Was there ever...

I have a friend with a sol-ark and 10kwh of batteries. He's not making it thru the night and the solark starts his generator just as it should. But what it does is charge his batteries nearly 100% before killing the generator. This mean the batteries are full when the sun comes up which is...

When moving slowly or under a load the throttle just dies. I thought it was a bad position sensor on the pedal but I'm starting to think otherwise. If I just stab the pedal and go, the cart seems to work better. In my case the cart dies and coasts to a stop. If I release the pedal and press...

I'm running a home brew pair of LFP batteries with two BMSs. I've programmed the Sunny island 6048's to shut off at 42v. I'm not using the current shunt because I have two inverters, two batteries and a pair of morning star charge controllers. I would have to add another busbar into my system...

I left my pack on but not connected to any load for two days and when I came back to check, it had shut off the contactor. A quick connection to a 10ohm resistor on the battery leads woke it up and caused it to pull in the contactor. I’ve been accessing it via the XiaoxiangBMS app on both ios...

I’m pretty sure the 200amp QUCC bms is a knock off of another brand. Is there any iOS app for this BMS? It came with a link for android but I don’t have an android device. It also comes with a link for PC software. I haven’t tried yet, but I wonder if I can connect to it with a bluetooth...

I read the manual today and saw that the DIGIN pin cannot be reassigned to another function on my 6048 Sunny Island. DIGIN is used to signal that the transfer switch is in GEN or GRID position. The two relay outputs can be made to do all sorts of things. Does anyone have any ideas for a way...

I have read the threads here about how to turn on the Daly 16s 250amp by connecting P- to B- while a charger is connected. It all seems rather hokey. So if you didn't know you needed to get the LIGHT BOARD/ POWER SWITCH, here's how to do it... You need an 8 pin JST PH 2mm spacing female plug...

I’m using chargery coupled to their DCC, and noticed something the other day... when charging the battery from a morning star charge controller, I noted that the charge side of the DCC was shutting off. Battery voltage was about 3.23v per cell and no cell was anywhere near 3.6 yet the BMS was...

Given that the chargery DCC does not do soft start when commanded off and back on, I'm seeking ideas to make sure it stays off if it is shut down for low voltage on the discharge mode. I've got a HUGE battery and if it goes dead, I got bigger problems.... I don't mind if the inverters stay...

I searched the forum and didn't find the answer so I'm asking. Hope I didn't miss the thread I'm looking for because I can't be the first to ask. :) . Does anyone have the battery settings for sunny islands running LFP batteries? Section 220 covers battery settings.... I expect to disable...

I’ve read the manuals I can find on the chargery site and I’ve searched the forum here... I must be missing it.... can someone tell me the correct power up sequence? I imagine I turn on my intverters‘ breakers first, then power up the BMS which turns on the DCC... and I expect the DCC will...

I'm new... can't find the answer on the threads.... I'm about to buy a chargery 16s unit and want to know the max length of the cable to the remote can be? My batteries are in the basement and I have an existing 40' cable from an older inverter remote already in the walls. Also, whats the...