Hi Jay Hi Larry The X240 is a 4000 watt transformer it is also available in the PSX-240 Both can be used as a step up, a step down or a balancing xfmr.
Below is a link to the manuals. https://www.outbackpower.com/resources/documents/product-documentation/item/autotransformer-technical-documentation Balancing transformer is not required by the Radian or the FXR inverters. I was used in the older FX series usually as a step up/balancing Xfmr. In step up operation it allows a single inverter to be on and will provide a second ac voltage of the opposite phase. If 2 inverters L1 and L2 were present it would load balance which allowed the least used phase to contribute to the most used phase. It can still be used as step up with a single FXR inverter meaning a single unit and the X240 will provide two phases L1 and L2 with 180 degrees of phase separation. It will not work as a load balancing xfmr using the FXR inverter. With the FXR we lost the load balancing ability. What we gained was the ability to sell back in a multi inverter stacked system, the 7 modes available from the Radian and Selling with in a 3 phase 120/208 system up to a 9 inverters. I hope this helps. Take Care All From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Jay Sent: Wednesday, February 3, 2021 4:45 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] Load imbalance issues with SolArk? Hi Larry I’m not so sure about that. The X-240 doesn’t work with the Radian or FXR versions. IE it won’t balance the loads so that the inverter sees a balance on L1/L2. It did do this for the older FX versions. Jay On Feb 3, 2021, at 2:10 PM, la...@starlightsolar.com<mailto:la...@starlightsolar.com> wrote: Amos, When using it in balancing mode, as seen in the attached image, the PSX will provide 120Vac from either leg and the inverter output should stay balanced. A 240Vac circuit from the main panel goes to the PSX then to a sub panel and any 240Vac loads stay on the main panel. Larry Crutcher Starlight Solar Power Systems <Screen Shot 2021-02-03 at 2.00.39 PM.png> On Feb 3, 2021, at 1:49 PM, Amos Post <integrityenergy...@gmail.com<mailto:integrityenergy...@gmail.com>> wrote: We have had this issue with a recent installation. It’s a new off-grid house build, and so not many loads to speak of yet, except mainly power tools. The Solark 12K will not start any of: portable air compressor, table saw, and sometimes struggles with a miter saw, which are each 16amps or less at 120V, but I have measured close to 50amps start up for the air compressor and table saw. The air compressor and table saw are 1.5HP each. What helps is if the motors are warmed up, or putting another load on the other leg to balance the inverter’s output. Was thinking we would install a couple of dedicated 120V outlets for “high-current” 120V loads with a PSX-240, stepping down the inverter's 240 to 120. My understanding is this will solve the issue for starting these loads, but not sure if we might run into issues with inbalance down the road... Would be curious to know if there’s another way to balance all of the house loads using the PSX-240?.. <IE LOGO 150x78.jpg> Amos Post Integrity Energy W 802.763.7023 C 802.291.2188 ienergyVT.com<https://protect2.fireeye.com/v1/url?k=1446f2de-4bddca0a-1445fb55-860a66ff9d26-4a559e51315323ab&q=1&e=8bda5334-eefc-4426-882f-473bf8f783da&u=http%3A%2F%2Fwww.ienergyvt.com%2F> Facebook<https://protect2.fireeye.com/v1/url?k=4dfa2226-12611af2-4df92bad-860a66ff9d26-6f5b7f95c12f7468&q=1&e=8bda5334-eefc-4426-882f-473bf8f783da&u=https%3A%2F%2Fwww.facebook.com%2Fintegrityenergyllp%3Fref%3Dhl> On Feb 3, 2021, at 2:41 PM, la...@starlightsolar.com<mailto:la...@starlightsolar.com> wrote: If it turns out to be true, could you simply add the Outback PSX-240 to balance the loads? Larry Crutcher Starlight Solar Power Systems On Feb 3, 2021, at 10:52 AM, Nick A Lucchese <luccheseso...@me.com<mailto:luccheseso...@me.com>> wrote: Good morning Wrenches, I’ve strongly been considering using the SolArk 12K unit for awhile but have heard from a few folks that there can be somewhat frequent issues with the inverter shutting down from line to line imbalance. As little as 1400 watts? I could see where these instances would be minimized with attention to detail on balancing all the loads but if’s as little as a delta of 1400 watts that might occur with something as innocent as a toaster oven. Seems like it would also be less of an issue in a grid back up or AC coupled scenario but for off grid I’d be bummed to be getting calls every couple weeks from an off grid client that trusted me to offer the right equipment. How much of an issue is this? Is it getting exaggerated? Those that have NOT had this happening was it on a full time off grid site? Has it happened less on sites using the "Limited to Home” mode? I have an upcoming project that was going to be setup with a couple Radians in HBX mode and my thought was perhaps it might be an ideal solution there but if the continuity of electrical service was going to be provided mainly through batteries and inverting and not through the pass through relays the majority of the time then the site might likely experience this issue with imbalance shutdowns. There are many attractive features of the SolArk and I really like the thought of taking advantage of the 185 amp DC charger versus the Radian’s 115 but I’m kind of thinking the risks may outweigh the benefits if these shutdowns occur even once every couple of months. Any of you have a long enough history with them to chime in with your observations? Are they most reliable for AC coupled with backup rather than off grid or the “Limited to Home” mode? 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