Most reacted threads

New Sunny Island and JK PB BMS set up - problem and solution. We’ve had a US 6048 Sunny Island 12kw split phase set up for many years now. It was set up as back up for when grid power was lost with a lead acid forklift battery. That set up worked well for years. We recently upgraded to the JK...

Hope this helps somebody in the future. This has got to be the most difficult troubleshooting I’ve ever had to do with this inverter. Now, having solved it, the solution seems so simple. Short version If you found and fixed all the faults and the inverter still shows the 3701 or 3501 error...

Sunny Island running at 70 Hz problem and solution. Short version. If the Sunny Island is still putting out normal, 120/240 power but things are failing like computer UPS systems then check the frequency. If the frequency is at 70.0 Hz, in my case, the solution was to remove all DC and all AC...

This is a write up of how I managed to read SI 6048US values via a raspberry pi and send the values via MQTT to Home Assistant. Of coure you can use something else than Home Assistant. I have 4 Sunny Islands in a 2Phase4 Setup with an external BMS (JK-BMS). Part list: - SI RS485...

Are there any early solar adopters who had NEM1 who have now been transitioned to NEM3/Solar Billing? What are your new strategies? How is it working? We have NEM1 and at some point we will probably be transitioned to NEM3 or the new Solar Billing here in California. The strategies for the two...

So, if you you got one of the newer (discontinued now) Sunny Boy inverters (3.8, 5.0, 6.0, 7.7, etc.) and there is a password already set and you don't know it, you need to get a PUK (Personal Unlocking Key) for the inverter. To get the key you need to give SMA the serial number of the...

Is anyone using a dual Sunny Island set up with the EG4 Power Pro batteries and BMS communication successfully? I’ve seen some threads but not exactly sure how successful those set ups were or still are. One post said you had to install a termination resistor, a BMS cable and put another...

Walmart distilled water used to be $0.98 per gallon. Now it is $1.48/gallon. Looking at possibly getting a water distiller. Amaon has some in the $100 range. You still have to buy over 60gal at that price to pay for the distiller. Another problem is the quality of the distilled water. Once I...

Short version - use the Sylvania headlight restoration kit to get rid of yellowed sun damaged screen. Long Version - The headlights on my truck were really badly UV damaged. Got the Sylvania headlight restoration kit based on a good test by Project Farm on You Tube...

24 kW Sunny Island system with 190 kWh of CATL battery storage and 12kW SI system with 44kWh as back up. I have been looking to switch to lithium for many years now. I have been using a large 48V forklift battery as the power source for the split phase 12 kW Sunny Island system for several...

Are there any good 18650 batteries on Amazon? I see too many with bad reviews and massively overstated capacity. I see that the 18650 battery store has a bunch, but trying to avoid shipping fees. Has anyone gotten any that are good and stated capacity is correct? Seems like there are a lot of...

Been trying to email my contact at JK for over a month now and haven’t had any replies. Normally they reply within the next day. Also contacted the factory and the trading company and other JK contacts but nobody’s phone number seems to work anymore. No replies to emails. Just wondering if they...

Parallel strings and overpaneling or how to maximize PV production on a single inverter. In the past I was told that you could safely add 20% more panels to an inverter than the name plate rating, i.e. on a 5kw inverter, you could put 6,000 watts of PV panels. New SMA docs say you can overpanel...

It seems that the Community Enegery Electric Generation Charges "CEGC" stated around Sept of 2022. You automatically got put in and set up with you local provider unless you opted out and stayed with the utility. Before you had to (or could) pay the NEM the electric charges at the end of your...

Running off grid with lithium batteries. Doing a test of the batteries. Just got the errors listed below. 419 W402 GN fail lock 418 W738 warning GNsynloss The SI is set up as GEN only. The dig in contact is closed and the generator was set to auto start. It was also set to start the battery...

Testing the SI with the JK PB BMS off-grid. Moslty ok, but every few days we get a brown out. SI error messages as follows: W755 LoBatMod1 5:06:08 W756 LoBatMod2 5:06:07 W757 LoBat Mod3 5:06:06 F952 ExtBMSTimeout 5:06:06 W756 LoBatMod2 5:06:06 F952 ExtBMSTimeout 5:06:06 Battery is at about 80%...

Setting up a new LifePo battery with 2 SI 6048 and the JK-PB2A16S-20P. In the AM after taking out about 20kwh overnight, the Sunny Boys start charging the batteries with more and more current until it reaches the 30A AC set up in the 210.02 InvChrgCurMax. The 30A AC charges the battery with...

Is there a plug in solution that you can set up to charge batteries during the day, then have the batteries power house loads at night while still being connected to the grid? Something that you could, say, plug into a dryer outlet or EV outlet that can then supply the night time loads all while...

Looking at filling a vertical wall on a 40 foot high cube container with solar panels. Has anyone done anything like that? How did they mount them? Attaching two by fours to the container and then attaching the panels to that is the cheapest, but not sure how strong it would be. Unistrut would...

I just got a Chins 100Ah battery at Walmart. Have 90 days return window. How to test it to make sure it is good and reliable? Have a Renogy current shunt, volt meter, clamp on amp meter, 10A LI battery charger but that is about it. Oh, have a 100A Harbor Freight battery tester. I use the LI...

Has anyone done a 3-D print for the JKPBBMS large 4.3 inch display and the PCB board? I see there’s some files out there where people have done it but I’ve never done any 3-D printing. Not sure if I should buy a printer and do it myself or find somebody online to print these for me. I need about...

I got an F605 error today on slave 3. I was walking by and saw red light on it and the other inverters had no red light on. It was flashing the error message and looks like the SI was on but not connected. We still had power in the house so nothing went down, but it looks like that slave just...

Does this look about right for options for using Sunny Island 6048-US with lithium batteries? When connection to a lithium battery: 1. Update SI firmware that has lithium battery option. Some SI don't list lithium battery in the battery options. Actual battery options: 1. Buy SMA approved...

We have a Sunny Island set up with a lead acid battery. Looking to change it to lithium. From what I understand the EG4 power Pro battery can communicate with the Sunny Island in a closed loop. Anyone doing that now? Reliable? Any hiccups? The lead acid battery has been pretty bulletproof, but...

These 200W portable panels any good? Prices seems pretty reasonable. For RV camping. The Xdays are a lot lighter. The JJI are glass and heavier. Both need support stands of some sort. Both 200W total. 50% off - $120...

Was charging the batteries with the Sunny Island from a generator when the Sunny Island suddenly started to back, feed the generator and then shut the generator off right away. Everything was working fine. Batteries reset to 100% SOC after they received the 100% reset value in the JKBMS. RCV was...

Seems like prices for these are coming down a lot. This one was $100 more in Sept. ($399). Been looking at these types for a long time, but most all have some sort of issue (not rated capacity, bad bms, no low temp protection, etc.), so I've been waiting. Can anyone recommend a good one or 2 to...

Using a mini split for heat in the winter? The mini split AC is great for cooling in the summer. Uses very little power, it’s quiet and very effective. We’ve been running off grid for about 2 1/2 months now and we’re also using the mini split for heat in the winter. Does a really good job with...

Looks like he is testing Schneiders now. What was the reason he is not using the SI's anymore?