XW6848 load shaving balancing?

new2PV

I read on the Schneider website that when using load shaving they recommend for best results to keep the phases balanced. Is this something I should be looking into? Maybe install a outback balancing transforner? If anyone has more info on this please post.

BB.

I would suggest contacting Schneider directly about this question... You can put a balancing transformer on the AC input to the inverter or on the AC output--I am not sure which would be best. Done wrong, and you can have other issues (circulating currents through the XW and balancing transformer).

-Bill

Dave Angelini

I would say this is a basic electrician skill. You always try to balance the split phase loads to keep the panel balanced. Balancing the panel has very good effects on any split phase inverter.

new2PV

I called Schneider and basically they could not tell me anything about this transformer for balancing loads when on grid. Hard to balance loads when the loads are intermittent, ie. a toaster or hair dryer used at different times.

BB.

Yea--Short term loads are a pain. And probably not worth worrying about in the big scheme of things. The cost of the balancing transformer and its losses probably will not have payback from the energy savings/efficiency (and the complexity can cause other problems too).

-Bill

Dave Angelini

BB. wrote: »

Yea--Short term loads are a pain. And probably not worth worrying about in the big scheme of things. The cost of the balancing transformer and its losses probably will not have payback from the energy savings/efficiency (and the complexity can cause other problems too).

-Bill

But long term loads like having all the lights, the toaster oven, the hair dryers, a 120V jet pump,and a microwave on L1 and a few small loads on L2 can cause a split phase inverter to not work well on a 60 amp service like all of these are. This happens alot when someone upgrades to from a single phase battery based inverter to a split. It is a basic electrician skill that is called for anytime a panel is wired by a pro or someone who wants to do it right.

new2PV

Question how much power is lost in this transformer?

new2PV

12 watts is lost for idle for the psx-240 transformer.

new2PV

That is 6 watts per phase.

mike95490

ion the scheme of things, that 12w loss, is nothing

inetdog

mike95490 said:

ion the scheme of things, that 12w loss, is nothing

Depends on your scheme. It is after all still 288wH per day. It is less than the tare of most large inverters.

Dave Angelini

I would say that the key to a 12 watt loss for an offgrid application, is being able to shed the loss in bad weather. It is the key to being able to live off 4 KWH per day without a generator. It is also as Mike said, "nothing" when you have the 40 KWH available.