George_Moore
New Member
- Joined
- May 3, 2022
- Messages
- 24
Can SMA SUNNY BOY SB10000TLUS-10 208V SINGLE OR 3 PHASE STRING INVERTER SOLAR be used in US residential 120V/240V grid-tied system?
The SB10000TLUS-10 specs indicate it can be configured for 240V single phase output. (edit: I got more info, thank you very much. NEW ones indicate this. I was going to buy one, but I don't know if it is new enough. Others reading this, be careful.)
It looks like it can be used in US residential 120V/240V systems, but when I went to buy it it has a warning that it is not for a 120V/240V system.
Well, I see it is not 120V, but then can't it still be used on a grid tied system by tying to the 240V? Is that not allowed? (Edit: the version I was buying might not have been able to be configured for anything except 208V in which case my 120/240V system won't work.)
Why would SMA make a 240V single phase option if it can't be used on the grid? (answer: The 240V system will work, but the warning pplies to older 208V systems. They can't be used on 120V/240V systems due to the inability to sync the phase.)
What am I missing here?
(edit: I meant, it doesn't seem reasonable that SMA made a residential system that can't be tied to the grid. It turns out, this can be used just fine, IF the unit is one of the new ones that can be configured for 240V single phase. The older ones only have L1, L2, and Neutral, which I believe means it won't work on my system. But that means the designation of 208V three phase may be incorrect. 208V three phase has 3 legs, L1,L2,L3, and provides 240V single phase from L1 to L3. Using L1 and L2 and neutral is sometimes (misleadingly) called 208V dual phase or double phase or two phase, all of which are not really accurate. It could be called split phase, too.
As far as I can tell, a true three phase L1, L2, L3 system could be wired to 240V even if it did not have the specific option to set a switch to make it 240V by using L1 and L3 to the 240V main with L2 being the high (wild) leg. BUT this one can't. So, anyone with a similar question, just check the specs and the installation manual, and make sure your electrician does too. Make sure your version is new enough to support your grid configuration.)
The SB10000TLUS-10 specs indicate it can be configured for 240V single phase output. (edit: I got more info, thank you very much. NEW ones indicate this. I was going to buy one, but I don't know if it is new enough. Others reading this, be careful.)
It looks like it can be used in US residential 120V/240V systems, but when I went to buy it it has a warning that it is not for a 120V/240V system.
Well, I see it is not 120V, but then can't it still be used on a grid tied system by tying to the 240V? Is that not allowed? (Edit: the version I was buying might not have been able to be configured for anything except 208V in which case my 120/240V system won't work.)
Why would SMA make a 240V single phase option if it can't be used on the grid? (answer: The 240V system will work, but the warning pplies to older 208V systems. They can't be used on 120V/240V systems due to the inability to sync the phase.)
What am I missing here?
(edit: I meant, it doesn't seem reasonable that SMA made a residential system that can't be tied to the grid. It turns out, this can be used just fine, IF the unit is one of the new ones that can be configured for 240V single phase. The older ones only have L1, L2, and Neutral, which I believe means it won't work on my system. But that means the designation of 208V three phase may be incorrect. 208V three phase has 3 legs, L1,L2,L3, and provides 240V single phase from L1 to L3. Using L1 and L2 and neutral is sometimes (misleadingly) called 208V dual phase or double phase or two phase, all of which are not really accurate. It could be called split phase, too.
As far as I can tell, a true three phase L1, L2, L3 system could be wired to 240V even if it did not have the specific option to set a switch to make it 240V by using L1 and L3 to the 240V main with L2 being the high (wild) leg. BUT this one can't. So, anyone with a similar question, just check the specs and the installation manual, and make sure your electrician does too. Make sure your version is new enough to support your grid configuration.)
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