Eg4 6000xp

[HighCountry]

@HighCountry

Created four drawings showing your potential configurations based upon using buss bars or no buss bars as well as 2 batteries versus 3 or more batteries.

When using two EG4-LL-S batteries with the 6000XP, the capacity of the two EG4-LL-S batteries becomes fully utilized under peak conditions. So… when you get a handle on your specific loading of 6000XP, you can determine if there is any urgency of obtaining a 3rd battery.

These wires sizes are based off the NEC 2020 Table 310.17 (Per EG4-LL-S page 13 manual).

So back to the two-battery configuration. After looking at the battery specifications, it appears the two EG4-LL-S batteries may be able to support the 6000XP under peak surge conditions of 12,000W @268.8 amps for 3.5sec. In practice, I have not verified this surge condition. I suspect it based upon the BMS reaction to the surge versus the battery cells.

This is why if there is a chance the two-battery configuration can deliver the surge demand. Then the recommended 4 AWG wire would additionally be less resistive in the effort to support the surge over the 6AWG wire delivered with the battery.

If however, the two EG4-LL-S batteries cannot deliver the 6000XP 268.8 amps surge then your system would need 3 batteries to support the 6000XP surge requirements and now the 6AWG wire becomes the recommend wire size in a buss bar configuration (per NEC2020 Table 310.17).

The calculations in these drawings can be found in my previous post#48.

Hope this helps.

Drawings:
View attachment 202681

Thanks!

EG4 LL-S manual reads at page 14: "Attach a grounding wire from the rack/cabinet to an equipment grounding conductor, then terminate the EGC at a grounding electrode."

Does the wiring diagram below comport to that standard by grounding batteries (or rack) directly to PE ground on EG4 6000XP?

 

[Bridgetown]

Thanks!

EG4 LL-S manual reads at page 14: "Attach a grounding wire from the rack/cabinet to an equipment grounding conductor, then terminate the EGC at a grounding electrode."

Does the wiring diagram below comport to that standard by grounding batteries (or rack) directly to PE ground on EG4 6000XP?

View attachment 202729

Nice Drawing.

Yes, keep with your #8 AWG THWN-2 wire size for your grounding conductor.

Connecting the EG4-LL-S battery grounds to the internal 6000XP ground buss bar and continuing the connection back to the ground buss bar within your main service panel is correct.

Additionally, you have only one N-G bond connection which is in your main service panel. (6000XP N-G software disabled)

I'm assuming meter is connected directly to your main service panel.

Will you be permitting this system? Just asking.

 

[HighCountry]

Nice Drawing.

Yes, keep with your #8 AWG THWN-2 wire size for your grounding conductor.

Connecting the EG4-LL-S battery grounds to the internal 6000XP ground buss bar and continuing the connection back to the ground buss bar within your main service panel is correct.

Additionally, you have only one N-G bond connection which is in your main service panel. (6000XP N-G software disabled)

I'm assuming meter is connected directly to your main service panel.

Will you be permitting this system? Just asking.

This is completely off grid - no power lines for 5 miles!! County said I don't need to get approval since out in the sticks (no inspector will drive out) but to make sure it's to code in case the day comes that they want to check things out.

 

[Bridgetown]

This is completely off grid - no power lines for 5 miles!! County said I don't need to get approval since out in the sticks (no inspector will drive out) but to make sure it's to code in case the day comes that they want to check things out.

Okay.

My only point in asking was to make you aware of how you would bring the "Direct Current (PV) into your building". The new code rules (NEC 2020 690.31 (D)) require the use of "metal' conduit at the entrance point into your building up to your equipment (inverter or DC disconnect). Your are allowed the last 6ft to be exposed for connection purposes. When outside your allow to use PVC conduit.

I say this to you because I was unaware and planned PVC conduit all the way. Anyway, I'm still trying to decide between 3/4" EMT or the 1" flexible metal conduit (FMC). Again, just a heads up, I know you are off grid, but you still want to be safe and aware of were the code is focusing.

 

[HighCountry]

Okay.

My only point in asking was to make you aware of how you would bring the "Direct Current (PV) into your building". The new code rules (NEC 2020 690.31 (D)) require the use of "metal' conduit at the entrance point into your building up to your equipment (inverter or DC disconnect). Your are allowed the last 6ft to be exposed for connection purposes. When outside your allow to use PVC conduit.

I say this to you because I was unaware and planned PVC conduit all the way. Anyway, I'm still trying to decide between 3/4" EMT or the 1" flexible metal conduit (FMC). Again, just a heads up, I know you are off grid, but you still want to be safe and aware of were the code is focusing.

I see... Once the DC PV goes into the cabin, it needs to only go roughly 4-6ft. I was considering putting a DC disconnector (interior or exterior?) at the cabin thus I think the transition from PVC conduit to metal should be super easy.

While we are on this topic... Is there a depth that PVC conduit must be buried? Our plan: schedule 40 at 18in as it never crosses any road just dirt driveway.

 

[Bridgetown]

I see... Once the DC PV goes into the cabin, it needs to only go roughly 4-6ft. I was considering putting a DC disconnector at the exterior of cabin thus I think the transition from PVC conduit to metal should be super easy.

While we are on this topic... Is there a depth that PVC conduit must be buried? 18 in is what I assume as it never crosses any road just dirt drive way at one point.

18" for PVC conduit using individual THWN-2 conductors

Schedule 40 PVC is commonly used for the installation of underground wiring to a detached garage or tool shed, or it can be used indoors like a garage or tool shed. The NEC requires heavy-duty Schedule 80 PVC on the side of a building where you transition from below ground to above ground as added protection from lawnmowers and weed whips.

The wall cross-section for Schedule 80 PVC is thicker, but the external diameter of Schedule 40 and Schedule 80 is identical, so all the PVC connectors and couplings are interchangeable.

Reference: NEC Table 300.5 Minimum Cover Requirements

 

[HighCountry]

@Bridgetown Thanks for the details... Very helpful for my build.

I was wondering if a lightening and surge arrestor is needed for the EG4 6000XP?

On Signature Solar, their kit with the EG 6000XP has (2) AC arrestors and (2) DC arrestors. DC arrestors - one at the PV combiner box and other at the main breaker. AC arrestors - both at the main breaker (L1 and L2).

Complete Off-Grid Solar Kit - https://signaturesolar.com/complete...split-phase-6400-watts-of-solar-pv-kit-e0008/

 

[Bridgetown]

@Bridgetown Thanks for the details... Very helpful for my build.

I was wondering if a lightening and surge arrestor is needed for the EG4 6000XP?

On Signature Solar, their kit with the EG 6000XP has (2) AC arrestors and (2) DC arrestors. DC arrestors - one at the PV combiner box and other at the main breaker. AC arrestors - both at the main breaker (L1 and L2).

Complete Off-Grid Solar Kit - https://signaturesolar.com/complete...split-phase-6400-watts-of-solar-pv-kit-e0008/

I understand these lightning arresters from Midnight solar are quality surge arrestors. If your area is susceptible to lightning then its recommended. Especially if you know of equipment form your neighbors or yourself of being damaged by lightning.

Installation becomes important (beyond hooking it up), meaning the main objective is to divert unwanted energy from your equipment. So your ground path needs to be kept short as possible back to your ground rod. Avoid parallel runs with other wires, again its about getting the energy directed to ground (Earth) and away from your equipment.

In other words, after the surge arrestor does its job, don't mess it up by running the ground wire in parallel with others wires that could inadvertently re-induce the energy back into your equipment. The objective is to get that energy to ground (Earth).

Just be aware, grounding for lightning and system grounding for electrical safety are two different objectives.

So your installations effectiveness is proportional to your ground path distance. So if you install an surge arrestor with a long return path with the ground running parallel to other wires, the surge arrestor starts losing its effectiveness and starts to become more of a mental placebo (piece of mind). Just me 2 cents

 

[HighCountry]

Worth every cent...

 

[livefree]

Thanks!

EG4 LL-S manual reads at page 14: "Attach a grounding wire from the rack/cabinet to an equipment grounding conductor, then terminate the EGC at a grounding electrode."

Does the wiring diagram below comport to that standard by grounding batteries (or rack) directly to PE ground on EG4 6000XP?

View attachment 202729

how did you create this graphic? I would like to be able to do the same.

 

[orion7144]

That kit also includes 2 pair of 1awg battery cables. Not sure why it came with 2 pair. I just installed that kit. The AC surge arrestors, according to the manual, are hooked up to L1 and L2 so why are there 2 of each AC and DC? I assume the 2 DC one's are for the 2 MPPT inputs to the inverter.

 

[EG4_Jared]

how did you create this graphic? I would like to be able to do the same.

I've seen a few people use draw.io to make their wiring diagrams. However, you would have to source your own images for this program.

Flowchart Maker & Online Diagram Software

draw.io