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Quick Question on wiring up the input so that I can enable charging and failover if the battery bank is low.

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(@dickson)
Noble Member
Joined: 4 years ago
Posts: 1047
 

I   am  preparing  for your  GS  12kw  inverter  now  but will order when  I  see on youtube that it is ready  .  I   will  wire the 4 ton heat pump  directly  to the 48v 220vac  inverter .   It  will never run at full load  as the heat pump  run at  4000 watts  and surge  is 7000 watts to start  .  I   will  only need to run  the  inverter 8 hours  and charge the  most  dangerous  bmw  mercedes  nissan  LG  panasonic  lithium ion  and lithium cobalt  batteries  at night .   I  will  not use your inverter for charging  but  am  using  many  e-bike  4 amp  chargers  .   It takes 10 hours  to  charge the  batteries  very  slow  but safer .   The  batteries is cover  with  concrete box in case  of thermal  runaway  and  never get wet   in the  covered  patio .   I  will  use the wifi  board to shut down at 170 degree  F .     The  inverter is  in the  coverd patio   and  will never get  wet  .   I  only charge  the 16s  lithium  batteries  with many  voltage  regulators to  61 volts  shutoff  to be safe  .   Last  summer I  run  the 15kw   powerjack  1  hour  and  let it  cool   for  2 hours  and  run  another  1   hour  and  let it cool down  again  and  again  and at most  4 hours a day running .   


   
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(@sid-genetry-solar)
Member Admin
Joined: 4 years ago
Posts: 2883
 
Posted by: @dickson
It will never run at full load as the heat pump run at 4000 watts and surge is 7000 watts to start

GS 6kw inverter should do this without hesitation.  Assuming this is some sort of large mini-split unit?  If so, you'd be quite adequate with a GS 6kw inverter.  Will run 6kw continuous 24/7 at roughly 130 degrees Fahrenheit internal temp (ambient ~75 degrees).

A "15kw" PJ should be able to hold 4-5kw continuous output, so are you sure the load is only 4kw continuous?

Posted by: @dickson
I will not use your inverter for charging but am using many e-bike 4 amp chargers . It takes 10 hours to charge the batteries very slow but safer .

Charge current (and voltage settings) are fully adjustable on a GS inverter.  I've tested it for several hours at 10A (24v); it can easily regulate much lower if you want.  What doesn't help is that the current charge efficiency has been measured around 65-70%; I hope to increase this with a PFC charge firmware update.


   
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(@dickson)
Noble Member
Joined: 4 years ago
Posts: 1047
 

Yes  I  see  your video  on the load test  of GS 6kw  last year .   My  heat pump is a 4 ton  high efficiency american standard  rated  3900 watts running  .  I tested with  wattmeter  at most  4400 watts  running  .    Starting surge  at  most is 29 amps which is 7000 watts  so your  6kw GS inverter  will  work  now .   I think your 12kw GS  inverter  will  run 8 hours  at half  load at 100 degree F  .    If  the 12kw GS  shut down at 170 degree  due to  heat in the summer  I  connected  a  50 amp beaker to  switch over to the  15kw powerjack  to run  a hour  and  then switch back to the  12kw GS .   

My  lithium ion cobalt batteries  is so dangerous   that  I  only charge  at  most  4 amps  to  67 volts  16s  and  offline not connected to inverter  .   My  voltage regulator  to each battery  will shut  each e-bike  charger  off  at  61 volts at  this time when  connected  to inverter .  I  see in one of your video that the wifi board can set the overvoltage to  65v  and  shutdown  .   My inverter  can only run 8 hours  being charge  by  3600 watts  solar panel  otherwise the batteries  must supply power . 


   
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(@the-blind-wolf)
Prominent Member
Joined: 4 years ago
Posts: 878
 

Seems like Sid need to make a Poroid with a water jacket and a small chiller, make sure its all incase with a drain tube to go outisde the caseing andthen  you can sell a inverter that made for anyting you throw at it.

 

I only know of one invewrter by signitur or something trhat is like over, and I mean over kill, its completely sealed and is made to go inside of mines and able to handle some serious heat, but dang its got a price tag for it.


   
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(@inphase)
Estimable Member
Joined: 4 years ago
Posts: 159
 
2 hours ago, The Blind Wolf said:

Seems like Sid need to make a Poroid with a water jacket and a small chiller, make sure its all incase with a drain tube to go outisde the caseing andthen  you can sell a inverter that made for anyting you throw at it.

 

I only know of one invewrter by signitur or something trhat is like over, and I mean over kill, its completely sealed and is made to go inside of mines and able to handle some serious heat, but dang its got a price tag for it.

Why not just go straight for the liquid nitrogen coolant loop? He could wind the transformer with a superconductive material and power the cryo equipment straight from the inverter. Also make the core 3 feet wide and 9 inches tall to reduce the stress on it. 


   
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(@the-blind-wolf)
Prominent Member
Joined: 4 years ago
Posts: 878
 
1 hour ago, InPhase said:

Why not just go straight for the liquid nitrogen coolant loop? He could wind the transformer with a superconductive material and power the cryo equipment straight from the inverter. Also make the core 3 feet wide and 9 inches tall to reduce the stress on it. 

Well, if you got the money, I'm sure Sid would make that dream come true. and sean would personaly deliver it to your door.

 

They did back in the early2k, made a chiller that was for cpu, that would sub zero the cpu.  but that was a area of what 1:x1: with the intel heat sheild cover. . .  Why not make the core a rolled up log instead of a donut?  I always wonder about that.  I guess its got to do with something with the magnet fields. but, seem like you could get more wire and all that with a rolled up log shape instead of a donut shape.

 

 

Heck why not have two equally size donuts one for one phase and the other for the other phase, then you can mkae them just as big and able to take anything thrown at them.  I mean I got a auto tran step up and step down that got a coil probley two times the size of what in the gs inverter.


   
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(@inphase)
Estimable Member
Joined: 4 years ago
Posts: 159
 
3 hours ago, The Blind Wolf said:

Well, if you got the money, I'm sure Sid would make that dream come true. and sean would personaly deliver it to your door.

 

They did back in the early2k, made a chiller that was for cpu, that would sub zero the cpu.  but that was a area of what 1:x1: with the intel heat sheild cover. . .  Why not make the core a rolled up log instead of a donut?  I always wonder about that.  I guess its got to do with something with the magnet fields. but, seem like you could get more wire and all that with a rolled up log shape instead of a donut shape.

 

 

Heck why not have two equally size donuts one for one phase and the other for the other phase, then you can mkae them just as big and able to take anything thrown at them.  I mean I got a auto tran step up and step down that got a coil probley two times the size of what in the gs inverter.

The magnetic flux is completely contained within the toroid, at least theoretically. Other types of cores have much greater flux leakage. A toroidal transformer is just about as good as the laws of physics allow a transformer to get.

There is only one phase, split in half to produce two voltages. Tying two single phase transformers together still makes a single phase. It is basically what is already going on in the standard transformer: Two transformers on the same core joined together in the middle. I think you'd actually lose something by having two separate transformers because you now have two primaries instead of one.

As far as autotransformers go, they are quite a different beast. Autotransformers are a lot more efficient than regular transformers because energy is transferred by conduction as well as induction. For a given size, an autotransformer can be much smaller for the same kVA. But they aren't electrically isolated between input and output. It's just too easy to accidentally put an unintended voltage somewhere it shouldn't be with an autotransformer.


   
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(@the-blind-wolf)
Prominent Member
Joined: 4 years ago
Posts: 878
 

Yeah now I remeber Sid said that before, forgot about the primery  wire thing and stuff.

 

yeah I've been seeing a lot of You Tubers use a 240v inverter and have a auto tran split it to the breaker with good results.

 

Just seems like something would go wrong with doing that full time though.


   
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(@waterman)
Reputable Member
Joined: 4 years ago
Posts: 313
 
Posted by: @inphase
But they aren't electrically isolated between input and output. It's just too easy to accidentally put an unintended voltage somewhere it shouldn't be with an autotransformer.

Isn't that the truth. 😉 If the autotransformer is built right though, you can split them and turn them into a regular transformer. But just remember, if it Chinese, they have smaller Watts so claim higher ratings.


   
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