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What is an upgrade for a Schneider SW4048 120/240?

Starfish Prime

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Oct 25, 2019
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I've been off grid in 800sf farm house with a Schneider Conext SW4048. I have never liked the thing, its a cantankerous beast.
They tell you the "4048" stands for 40 amps and 48 volts. The 48 volt part is correct but the 40 amps is max.
Sticker on unit says max 24 amps continuous on 120 side and 24 amps for the battery charger. 3800 watts continuous.
It's supplemented by a WEN dual fuel 4200 watt inverter generator. I don't have any high inductive loads either. Gas heat and inverter fridge, also hi SEER mini-splits blah blah blah

Largest issue is trying to utilize 30 amps and get it to share between charger and supply side. I'm sure its a programming issue but even the tech guys couldn't nail it down.

Anywhoos. I'm looking to replace it and considering Victron. I have to supply 240 split phase to the service panel just like you would from the meter.
Not grid tied so no fear of back feeding.
Anyone have an experience they'd like to share with supplying 240 split phase to the panel? In particular: the Victron products

I have 3K watts of PV,
10.2 KWH of LiFEPo4 EG4's
Midnite solar classic 250

Thanks my new friends
Starfish Prime
 
I've been off grid in 800sf farm house with a Schneider Conext SW4048. I have never liked the thing, its a cantankerous beast.
They tell you the "4048" stands for 40 amps and 48 volts. The 48 volt part is correct but the 40 amps is max.
Sticker on unit says max 24 amps continuous on 120 side and 24 amps for the battery charger. 3800 watts continuous.

It's supplemented by a WEN dual fuel 4200 watt inverter generator. I don't have any high inductive loads either. Gas heat and inverter fridge, also hi SEER mini-splits blah blah blah
Largest issue is trying to utilize 30 amps and get it to share between charger and supply side. I'm sure its a programming issue but even the tech guys couldn't nail it down.

A dual fuel 4200W inverter generator is undersized for your unit. Period. You need a 6kW continuous output generator at your elevation (they lose about 3.5% per 1000' elevation) and on your chosen fuel.

I don't see a Wen 4200. I find this 6800W surge/5100W continuous:


On propane, it's rated for 6000W surge/4500W continuous.

It's undersized too, and it's the largest inverter-generator I found on their site.

Unless the Schneider has something equivalent to Victron PowerAssist, the only way you can manage it is to manually manage your loads and charger output so that you never exceed your generator rating for your fuel and elevation.

In other words, when running on generator, you are limited by the generator. You must reduced your loads to never exceed the surplus available after charging.

Anywhoos. I'm looking to replace it and considering Victron. I have to supply 240 split phase to the service panel just like you would from the meter.
Not grid tied so no fear of back feeding.
Anyone have an experience they'd like to share with supplying 240 split phase to the panel? In particular: the Victron products

A few of use have split phase Victron. It will of course take TWO inverters, but it works great. With a Cerbo GX, you can interface your EG4 batteries with it and put them in control of the system.

While I eat, drink, snort, gargle, and poop blue, I would be hesitant to abandon the Schneider. It's Tier-1 hardware.

Sounds like you just have a generator problem.

I have 3K watts of PV,
10.2 KWH of LiFEPo4 EG4's
Midnite solar classic 250

No need to change any of the above, but a Victron smartshunt setup as a DC energy meter on the Classic output would allow you to log your PV production in VRM.
 
Schneider, Xantrex, and even going back to Trace Engineering, inverter parts numbers indicate nominal voltage expressed as a 2-digit whole number on the right, and tenths of a kilowatt on the left. So, a "4048" would be 4.0kw and a nominal voltage of 48V. A "2512" would be 2.5kW and have a nominal voltage of 12V, for example. Also, "SW Series" was introduced by Trace Engineering in the mid 1990's and amazingly has survived as a Series until only the past few years.

The old Trace and Xantrex SW4048 was 120V only, not split-phase like the Schneider Conext version. Ratings for Conext SW are listed at 250V:
- Maximum 250V continuous load: 3800 Watts = Amps.
- Maximum Single-Leg 125V continuous load: 2700 Watts = 21.6A
- Peak load: 7000 Watts

The specs say the charger can do 45A DC. The specified input current to make that 45A is 12A at 250V AC = 3000 Watts.
The Conext SW use a 30A double-pole breakers for the supply, which at 80% is still capable of 6000 watts continuous. So.... the supply is there.

What is the limit on AC Input set to in the config? The only things I can thing of holding it back from pulling more would be that limit, or voltage drop. I don't have personal experience with Conext SW, but with XW they will tell you to use 60A input breakers and also set the input limit parameter to 60A also. I'm happier with 24A limits for 30A breakers, 48A for 60A, etc.
 

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