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Hi,
Here is my wiring diagram, I am a bit worried about the size of the Pylontech cables 25mm2 connecting to the inverter, So I was wondering if you can connect your batteries like this and then have a 50mm2 cable from the lynx to the inverter? And if this is ok what size Mega fuses will I need in the lynx distributor?
The cables and fuses have to be sized based on the maximum current that should pass. If you start from the Multi II, then you have a maximum possible current of 70A (for 48V). The Pylontech cables are rates to 120A, therefore also one pair of cables should be enough for 2 batteries in parallel. Therefore, having them as in the picture is even better.
If use the Lynx distributor, then you need to use Mega fuses...and the smallest one is the 125A
The US3000s are rated for 37A each. So together close to 70A discharge nominal. Probably just referring to their discharge not what the inverter can do.
Batteries are undersized for the system as you pointed out it needs more amps.
I'm looking at an almost identical installation, with the difference being a GX Multiplus 48/5000/70 and a MPPT 250/100.
On the manual of the inverter, it is suggested for a 70mm2 cable to be used on the inverter battery connection, however, the pylontech standard cables are 25mm2 as mentioned on the thread above.
How does one overcome this?
Thanks in advance.
