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The 6000XP has gen boost. Your generator should work just fine.

As said above, there will be a little bit of uneven wear, but I would not worry about it. THe cycle count on these is so high it won't make a difference. furthermore as one battery gets weaker over time, the other will start taking more of the load. For the most part each inverter will...

The other thing I would do is drop the combiner box and feed the inverters directly into the main panel... But that assumes there is room in the main panel for three 40A 240V breakers. I know Will likes the combiner box arrangement, but I don't see the point.

At first glance your plan looks pretty solid. One thing you should consider is to use the battery paralleling kits to parallel sets of three batteries and then use busbars to tie the two sets together. This would be entirely within the specs of the inverters and batteries Alternatively I...

What is your definition of Grid Tied and Hybrid? (I don't like the term Grid Tied because it means different things to different people) Since you are saying both can export, I assume the grid tied is either a string inverter or a micro inverter (Micro Inverters should be called micro-string...

Cool I am down in Los Gatos.

What part of the bay area?

The 3000 does not have software to turn off the dynamic bonding.

So.... 8KW is 8000W/240V=33A. The jumper should be an 8AWG

What Wattage is the Inverter?

>He said he’s getting one amp per RSD module on the strings, I am not sure what that means. Does that mean he is getting a total of 5 amps on each string? What voltage is he getting at the PV connections to the inverter?

This is something I have wondered about for quite a while. They support Megafuses in all their gear and sell 48B versions of Megafuses, but they never really address the AIC question. Several months back I had the chance to talk to a Victron 'ambassador' about a system and he was...

Brobably nothing to worry about. The BMS will detect the overvoltage and turn off charge before the cells are damaged.

So sorry to hear!!! But thank you for sharing. The large DC current we deal with needs to be respected. I am curious, where in the circuit was the fuse, and was the arc across the fuse gap?

Patience Grasshopper. Patience.

As long as the Power Supply is correctly set to the target voltage, there should be no reason to worry about over-charging the cells. At around 3.45 volts the current will start tapering off and the voltage will start going up. This will accelerate till the charge is complete. You have...

That cell started with a higher SOC or was a 'weaker' cell. This is normal.

OK. Now it is a matter of being very patient. Set the target voltage on the Power supply before you hook it to the parallel cells and then hook it up and wait. No matter how tempted you are, DO NOT raise the voltage on the power supply.....

Lets do some math. I assume these are new cells. New cells generally come at ~40% SOC. 16 280Ah Cells in parallel will need .6 X 16 X 280 = 2688 Ah to fully charge. At 20A this will take 2688/20=134Hrs to fully charge. Yes, it is normal. Keep in mind that at 3.3V 20 A is only 66W...

I don't have a reference, but have thought about it some. The idea of a very flat profile pack is intriguing to me. If you decide you need cell compression, these layouts could be challenging.

The spec sheet says 10KA interrupt. That is lower than the class C but better than most other types of fuses.

No. The best resolution is to make sure the cells are balanced and the BMS never shuts off.

Nice video. It is true that a breaker will not protect you from direct contact with the hot wire . However, what is not mentioned in the video is that a breaker in conjunction with a neutral-Ground bond will save lives if the short is a ground fault.

I have not run numbers but I suspect his calculator is using the ABYC tables (American Boat and Yacht Council). These tables are much less conservative than the NEC tables. The reason I suspect this is two fold 1) he is an RV builder and a lot of RV builders us the ABYC tables. 2) His...

That sounds correct. To be code complaint it should be outside.

They might exist, but I don't know of any Tigo sells two systems. One is just the rapid shutdown system and the other is an optimizer system that will also do the rapid shutdown. (The Cloud Connect is for the optimizer system that has the cloud internet connect) The rapid shutdown system...

The rapid shutdown requirement has been in the NEC since 2017(?). It is not just CA. I don't know about 'shorting' the panels. I had not heard that before. I guess if the VOC is high enough on the panel it might be needed. Most systems these days use a signal imposed on the power lines...

The max series fuse question is a good one. If we just add the two Iscs together, two strings are still under the 20A. The NEC requires two 1.25 multipliers (That is where the 1.56 comes from). The first 1.25 multiplier is to cover any extra current due to the Isc only representing...

With only two strings, you do not need fuses at all, but you do need an 'accessable' disconnect. (In NEC terms, 'accessible' means 1st responders can get to it.) Fuses or breakers are only needed when there are 3 or more strings. However, you do have to size the wires correctly. The NEC...

At the risk of sounding like Captain Obvious, the first thing to do is to see where you can reduce your energy usage without impacting your lifestyle. 66KWh is a lot of energy so if you can do things like install more insulation, get more efficient Air Conditioners, water heaters, etc it will...

You can ground the battery rack to the inverter. That is just fine.

Its going to be both. The characteristics of the panel change with the sun angle and the temperature, The MPPT is constantly adjusting to get the most it can from the panel. BTW: That nice bell curve of the power tells us the MPPT is probably doing a good job tracking the powerpoint.

The battery rack should be grounded along with the rest of the system. I assume the device is at the battery rack so ground it at the samp point the rack is grounded.

I don't know if the dip is typical, but I would not call it surprising either. The MPPT is constantly adjusting the current to find the best power point. As the sun get to the best angle the best power point is a lower voltage and a higher current.

I thought about that too. My primary concern would be what forces are on that bracket.