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My little grid tied system with tesla batteries
#1
Update: new cabinet für 6 x Tesla model S packs:
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Hi @all,

this is my first real post to this board. I read a lot here and come to the conclusion to build my own little
grid tied system ..... but with used tesla model s batteries. I used a Victron Multiplus II with a Simp BMS in combination with a
fronius solar inverter and a 3.5 kw solar array. As pictures say more than 1000 words: here they are Smile

 
 
 
 

 

 

The system works quite will even with the full load of about 5000 V/A. The current draw is more than 100 Amps then but
the components even don't geht warm.

Thanks a lot for all the informations i got from this forum !

greetings from germany

Jens
pau1phi11ips, hbpowerwall, camthecam And 2 others like this post
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#2
Very Cool!
hbpowerwall likes this post
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#3
Nice! So you feed 5kW from battery to grid after sunset?
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#4
Looks great mate, well done!
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#5
(09-16-2019, 06:49 AM)stevelectric Wrote: Nice! So you feed 5kW from battery to grid after sunset?

No, a max of 5Kw available to satisfy the local demand.
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#6
(09-16-2019, 06:49 AM)stevelectric Wrote: Nice! So you feed 5kW from battery to grid after sunset?

No .... both packs combined are more than 10 kW/h.

The inverter is programmed to serve my local demands. Excess power (if we are using more then 5 kw) is provided by the grid.

This is the case if my wife is using the dryer and washing machine in parallel.

There is a 3 phase meter on the grid side. In germany we have phase balancing meters. My inverter is on phase L1.

If i use let's say 500 Watts on L2 and L3 i can provide 1000 Watts to L1 (trough the inverter) and will not be billed for the energy on L2 and L3 -> L2+L3-L1 = 0

Jens

(09-19-2019, 04:38 AM)hbpowerwall Wrote: Looks great mate, well done!

thanks a lot Smile

Was my first time starter project  ..... will be enhanced to a 3 phase system in near future.

Jens
completelycharged likes this post
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#7
Nice job! You must be the same stxShadow I see on the TeslaBMSV2 github!
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#8
(10-07-2019, 11:42 AM)Bobby Wrote: Nice job! You must be the same stxShadow I see on the TeslaBMSV2 github!

might be possible Wink

sadly the owner of the github repository is not answering any comment.

cu

Jens

PS: Did you manage to compile the source now ? if not a can send you a pre compiled version.
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#9
Never got it compiled with the restart function working, though that's not a big deal. I'd love to learn more about your setup here, though. I'd like to stay grid-tied, but the inverter I have to pull power from the batteries it's for off-grid use.
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#10
Hi stxShadow, can you send me the compiled SimBMS file you are using with your setup.
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