Question Over voltage cut off

[MemoriesByTheMile]

In a split phase system (50 a) circuit loads should be balanced based on your utilization. The manufacturer guesses at how you will use the RV. If the loads are not balanced, and everything is on one leg, you then find yourself in a situation where you cannot run something because one leg is maxed out and another leg is under utilized.

When a large coach is running on battery and has dual inverters, this is even more critical. But it is possible to add load balancing devices so that each inverter is carrying an equal load - this was an option installed on our SuperC, and it is very nice. Don’t have to worry about running oasis fans, microwave, coffee maker, lights, fridge, etc.

 

[team bradfield]

I've always use the Burner, much more efficient with 2 long haired women on board, long showers....nuff said

Let me clarify, my DW and DD are the long hairs, Im pretty much working on bald

 

[redbaron]

In a split phase system (50 a) circuit loads should be balanced based on your utilization. The manufacturer guesses at how you will use the RV. If the loads are not balanced, and everything is on one leg, you then find yourself in a situation where you cannot run something because one leg is maxed out and another leg is under utilized.

When a large coach is running on battery and has dual inverters, this is even more critical. But it is possible to add load balancing devices so that each inverter is carrying an equal load - this was an option installed on our SuperC, and it is very nice. Don’t have to worry about running oasis fans, microwave, coffee maker, lights, fridge, etc.

Can you share a product link or name for a load balancing option on the in inverter? Curious how it would work

 

[Kevin D Pem]

Can you share a product link or name for a load balancing option on the in inverter? Curious how it would work

I could see a load shedding scheme. But an auto balancing scheme would double the load center size to meet circuit protection codes.

I think it could be an option on high load circuits, but not every circuit!

Maybe a circuit breaker assignment circuit, similar to assigning vip addresses?

I don't know how much more complex they can make RVs before they can't find anyone capable of working on them.

 

[redbaron]

I was thinking similarly that doubling each panel but again, how exactly would that wire scheme look?

 

[Kevin D Pem]

I was thinking similarly that doubling each panel but again, how exactly would that wire scheme look?

I envision monitoring the two lines. And using solid state relays to select the under utilized line. Maybe a history que that keeps track of use frequency, allowing preselecting of potential load.

You can devise a very complex system, but your troubleshooting system would have to be just as complex if you expected someone to fix it!

I would only offer such a system for maybe 6 circuits, if I was crazy enough to offer such a thing.

Some quality smart home systems could be adapted I suppose.

The biggest advantage I can see is lowered utility bills. I don't think high end RV users care about that.

 

[MemoriesByTheMile]

Can you share a product link or name for a load balancing option on the in inverter? Curious how it would work

Our inverters are Outback Power Systems. We also have Outback’s PSX-240-Relay which can configured in a couple different ways, one of which is load balancing across L1 and L2.
I am not an expert on electrical theory but love to learn what the downsides are to this. It works well as I can see on the inverter loads on the monitor panel.

https://www.outbackpower.com/products/integration-products/miscellaneous/item/autotransformer

 

[Kevin D Pem]

Our inverters are Outback Power Systems. We also have Outback’s PSX-240-Relay which can configured in a couple different ways, one of which is load balancing across L1 and L2.
I am not an expert on electrical theory but love to learn what the downsides are to this. It works well as I can see on the inverter loads on the monitor panel.

https://www.outbackpower.com/products/integration-products/miscellaneous/item/autotransformer

So do you use a Hughes autoformer with this setup?

Seems to me to use the same method as that unit, but works on 120vac independently, rather than both lines combined.

 

[MemoriesByTheMile]

No, we do NOT have a Hughes Autoformer.

This Outback unit, as I read and understand it, has a relay which shuts it off when there is AC power (shore or generator). This Outback transformer is only operating when using batteries to power the rig through the inverters.

 

[Joe Dutchstar]

It is somewhat surprising to me that I can look at a screen full of data and not see items..

The Silverleaf screen has so much to offer.

Simple stuff. Voltage being used on line. Amps on each line.
High draw items wired to line.
Status of the each line.
Plus various other battery data.

All this helps understand how to manage load.

 

[Kevin D Pem]

It is somewhat surprising to me that I can look at a screen full of data and not see items..

The Silverleaf screen has so much to offer.

Simple stuff. Voltage being used on line. Amps on each line.
High draw items wired to line.
Status of the each line.
Plus various other battery data.

All this helps understand how to manage load.

View attachment 25037

Yes things that took time to compile in the past, at your fingertips! The only data missing, is years of learning what it all means!!!