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New Build Advice

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douglnc

New Member
Joined
Jun 3, 2025
Messages
10
Location
Franklin NC
I have purchased 2 Sungold SP6548 inverters to run in parallel, 5 SOK 48v batteries in a rack configuration, and 32 450 watt bifacial panels to be ground mounted. Everything has been in storage for a while and now i am starting the installation.

I have been reading some horror stories about the Sungold inverters recently and trying to decide if I should proceed with them or try to sell them and go with another brand like the EG4. Looking for advice from those who have worked with these before, I should have done more research before I made the purchase. I want to do this right the first time.
 
Are you going to be off-grid or retain grid connectivity for backup?

I don't know these inverters but if I were you, and you will have grid backup I'd just install what you have, no point spending $$$ unless you really have to :)

The wiring for all hybrids is pretty well identical, so if you leave enough space around the beasts you should be able to drop in alternative replacements with minimal hassle.
 
crossy said:
Are you going to be off-grid or retain grid connectivity for backup?

I don't know these inverters but if I were you, and you will have grid backup I'd just install what you have, no point spending $$$ unless you really have to :)

The wiring for all hybrids is pretty well identical, so if you leave enough space around the beasts you should be able to drop in alternative replacements with minimal hassle.
Click to expand...
I will retain grid connectivity. I am laying it out with plenty of room so it easy to work on or expand
 
Depending on how long you've had your batteries, this might be of interest:
Bluedog225

Thread 'Storing SOK rack batteries'

I‘ve had my 48 volt rack batteries for over a year and hope to install them this fall. I got worried about the state of charge so I topped them off with the aimes charger. Now they will sit in my closet till around December.

Do I need to worry about storing them fully charged? And if there an easy way to bleed off some charge for storage?

Something cheap and easy would be great.

Many thanks
 
douglnc said:
I might buy one of these just to put my heavy startup loads on like the well pump and a compressor. Are they compatible with the SOK batteries?
Click to expand...
Compatibility only applies if you are running closed loop. If you want closed loop on the XW Pro, you need to also get the Insight Home device. I recommend Insight Home in any case because it's the interface to the inverters that allows detailed configs. The XW Pro is a great inverter out of the box. But having control over configs and being able to update the firmware are really nice to have.

It's a great candidate for running inductive loads. They weigh about 140lbs each, and have a MASSIVE torroidal transformer. Be careful mounting - they are HEAVY.

Might also pick up the little conduit box that attaches to the bottom, or a mini PDP, for easier wire management.
 
Here are the data labels. Appreciate any information you can give.
 

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douglnc said:
Here are the data labels. Appreciate any information you can give.
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They are the older version OEM'd by Voltronic. The newest version currently available is OEM'd by SRNE and split phase from one until.

I've seen some reports of the older version having issues but I'd say there is more positive then negative.

Since you already have them I would run them so you can start benefiting from your system.
Your version was also labeled by MPP Solar as the LV6548. You'll likely find a lot of useful info if you search that model.
Note - the original version of that unit had a max VOC of 250V, the updated version with the higher VOC had more issues early on but I think they got better with time.

If SGP gives you the option to return them for the SRNE version, I would definitely do that. https://sungoldpower.com/products/6500w-48v-solar-charge-inverter-parallel-wifi-monitor

Hope that makes sense and doesn't confuse you.
In a nut shell if SGP lets you swap them for the version I linked I'd do that, otherwise run with what you have.
 
I have written to SGP requesting the swap we'll see what they say thanks for the input. If they say no I may decide to buy the ones you linked to anyway and try to sell these. They are 1250 each with the father's day sale. The current ones have a max input of 390 volts. My design has 4 arrays, 8 panels in each array in series putting out 404 volts. I don't want to reconfigure my arrays as that will reduce the potential power output.

Thank again for the info.
 
Another option i am considering if I am unable to swap these. Rather than buying the new Sungold versions I could buy one of the Shneider Electric XW Pro 6.8s, the Conext MPPT 80 Amp 600VDC Solar Charge Controller, Insight Home management device, and accessories for the same money as the new Sungolds. Everything i am reading about them says it is a beast of an inverter and very reliable. I would reconfigure my arrays to 6 panels each in series to get within the voltage range of my current Sungolds. Then I would use the 8 panels I pulled out of my current arrays to feed the Shneider electric system. I could move my heavy startup loads like the well pump and compressor to a sub panel powered by the Sneider electric system.

Does that make sense and would I gain a degree of reliability / redundancy. Or am I over thinking this. Trying to do this right and ask all the right questions before I spend any more money. Still learning.
 
You can't go wrong with Schneider.
I've always wanted one of them but once I switched from Voltronic to SRNE I couldn't justify the XW Pro.
I keep telling myself I should buy them while I can but must resist the urge... Needs vs wants....
 
douglnc said:
Then I would use the 8 panels I pulled out of my current arrays to feed the Shneider electric system.
Click to expand...
The Schneider does not have DC solar charge capability. There are Schneider SCCs that have the ability to work with the inverter. They ain't cheap but apparently equally reliable.
 
MisterSandals said:
The Schneider does not have DC solar charge capability. There are Schneider SCCs that have the ability to work with the inverter. They ain't cheap but apparently equally reliable.
Click to expand...
If you look at my list I have the Shneider Electric XW Pro 6.8, and the Conext MPPT 80 Amp 600VDC Solar Charge Controller. Does that work? Or am I missing something
 
douglnc said:
If you look at my list I have the Shneider Electric XW Pro 6.8, and the Conext MPPT 80 Amp 600VDC Solar Charge Controller. Does that work? Or am I missing something
Click to expand...
Oops, i missed that reading thru the posts.
Yes thats a good combo from what i've heard. I wish i had a Conext SCC but i already owned a Morningstar.
The 600V capability will be great for your huge array.
 
Those Schneider components are designed to work together.
If you decide to run your batteries without communication then you can even use another MPPT controller, some people on this forum are using Suyeego of alibaba at about $250 per unit delivered, no issues so far. I ordered one for my HV build but they are "adjustable" when it comes to batteries.
 
I am selling the Sungolds and I am going with two of the Schneider XW Pros. I also ordered one of the Schneider 100 amp 600v MPPT charge controllers, and the PDP (power distribution panel). I will be connecting my bank of 5 SOK 5.1 KWH 48v rack mount batteries. The MPPT charge controller will accept 3 strings of Panels. Each of my arrays will be 10 450 watt bi-facial panels in series. Everything should be delivered over the next couple of days. I am finishing my utility room where the equipment will be mounted this weekend. Hope to have everything built with permitting and approval by first week of August. I will report back once the system is running and let everyone know the result.
 
douglnc said:
I am selling the Sungolds and I am going with two of the Schneider XW Pros. I also ordered one of the Schneider 100 amp 600v MPPT charge controllers, and the PDP (power distribution panel). I will be connecting my bank of 5 SOK 5.1 KWH 48v rack mount batteries. The MPPT charge controller will accept 3 strings of Panels. Each of my arrays will be 10 450 watt bi-facial panels in series. Everything should be delivered over the next couple of days. I am finishing my utility room where the equipment will be mounted this weekend. Hope to have everything built with permitting and approval by first week of August. I will report back once the system is running and let everyone know the result.
Click to expand...
Don't forget to get an Insight Home. I know they seem a bit pricey, but you will LOVE having it, if for no other reason than to install the updated firmware.
 
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