on grid, but want off grid capability?
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Ya, I guess I wasnt thinking about the excess power created by the GT, it now makes perfect sense. I guess for my situation, the hybrid inverter would be the "best" way to go if I wanted that functionality.
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9 kW solar, 42kWh LFP storage. EV owner since 2012Comment
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Tesla was supposed to come out with a off grid version but for whatever reason decided to not bring it out. The off grid version was supposed to have lower input voltage inherent to off grid systems. The version they currently market has a high DC input voltage more inline with Grid Tie systems.2 Kw PV Classic 200, Trace SW 4024 460ah,Comment
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Tesla was supposed to come out with a off grid version but for whatever reason decided to not bring it out. The off grid version was supposed to have lower input voltage inherent to off grid systems. The version they currently market has a high DC input voltage more inline with Grid Tie systems.9 kW solar, 42kWh LFP storage. EV owner since 2012Comment
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No, No, No, you can not run a GT inverter on anything except the grid. The inverter not only needs an AC waveform to synchronize to - it also needs a close to infinite load to dump the solar power into. It will not run on a generator, it will not run on itself. However, SMA does make an "Island" inverter that is designed to create a little grid that the GT inverter can work off of, but it needs big batteries to absorb any or all of the power the GT inverter is producing.BSEE, R11, NABCEP, Chevy BoltEV, >3000kW installedComment
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No, No, No, you can not run a GT inverter on anything except the grid. The inverter not only needs an AC waveform to synchronize to - it also needs a close to infinite load to dump the solar power into. It will not run on a generator, it will not run on itself. However, SMA does make an "Island" inverter that is designed to create a little grid that the GT inverter can work off of, but it needs big batteries to absorb any or all of the power the GT inverter is producing.
AndyComment
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No, No, No, you can not run a GT inverter on anything except the grid. The inverter not only needs an AC waveform to synchronize to - it also needs a close to infinite load to dump the solar power into. It will not run on a generator, it will not run on itself. However, SMA does make an "Island" inverter that is designed to create a little grid that the GT inverter can work off of, but it needs big batteries to absorb any or all of the power the GT inverter is producing.Comment
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Yes. Switch the main breaker off to disconnect from the grid. Then connect your UPS (or genset) to the main panel.Comment
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That will definitely power loads, but most likely will not pass the test a typical GT inverter goes through to verify it is seeing a real grid or a hybrid inverter that is designed and configured for AC coupling. Have you actually done that without smoke being released from the UPS? Since a GT inverter is designed to output all of the solar to the grid, what is your experience with a genset or UPS being able to absorb all that energy?9 kW solar, 42kWh LFP storage. EV owner since 2012Comment
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Last edited by Ampster; 06-08-2022, 09:35 PM.9 kW solar, 42kWh LFP storage. EV owner since 2012Comment
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That will definitely power loads, but most likely will not pass the test a typical GT inverter goes through to verify it is seeing a real grid or a hybrid inverter that is designed and configured for AC coupling. Have you actually done that without smoke being released from the UPS? Since a GT inverter is designed to output all of the solar to the grid, what is your experience with a genset or UPS being able to absorb all that energy?Comment
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So, back to my question about your experience hooking up a UPS or Genset to a GT inverter? How long did it take before the smoke came out? Are you trying to imply that the voltage limit of a GT inverter will prevent it or the Genset from damage? A lot of things can happen between 240 volts and 263 volts and a lot of Amps can flow. Are you ignoring the important fact that a GT inverter is only limited by the solar generation which has no relationship to the load. In the case of the grid, which presents an infinite load that is not an issue. A genset or UPS has no mechanism to buffer the output of the GT inverter.Last edited by Ampster; 06-08-2022, 09:42 PM.9 kW solar, 42kWh LFP storage. EV owner since 2012Comment
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Originally posted by nerdralphGrid-tie inverters have an upper voltage safety limit beyond which it cuts back on the power from the array by increasing the MPPT voltage. With my Solis 240V inverter the specs state the maximum output is 264V.
some of the illegal type connections mentioned above? Maybe, the GT inverter
certainly is not going to much change the line voltage. It will be, regardless.
So someone said lets put an upper voltage cutoff in, but what? Line here should
not exceed 120/240VAC, so a 264V limit should be OK. EXCEPT, the PoCo likes
to run as high as they can, voltage here was running 127/254VAC. That voltage
can be expected to rise slightly as the GT pushes power out. Add here a long
run of adequate but somewhat lossy feed, pick up another 9V. That puts things
pretty much at 264V, though there is no danger to anything.
My GTs were capable of 277VAC operation, I bumped up the monitor to that limit
to stay operational. In the long term, I got the PoCo to lower their voltage, and I
installed a much bigger feed to eliminate most of the 9V increase. Bruce RoeComment
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