Northland wrote: Unsuitable?
You have made several errors in your snarky response.
1. Using a 50A shunt does not limit the inverter to 2.5kw. It limits output to 2.5kw AT NIGHT ONLY. Output can still be 5kw during the day. You forget that pv or battery or both can be inverted.
2. You are dismissing the possibility of using a bigger shunt before anyone has even tried, likely solving the 50A limit and wiring size issues. Even if inaccurate over 50A or 100A as the case may be, this would not limit the inverter to 2.5kw
Hi Northland. I'm sorry you found my response snarky.
I know you're an ex sparky, but I wanted to make sure everyone else realised they would need a 50 A (or less) fuse to prevent a possible fire if they used the 50 A shunt and whatever skinny wire it is possible to attach to its terminals, presumably by soldering.
You're right that I forgot about direct inversion of PV power. But whatever applies at night also applies to some degree when a cloud goes over. And fuses aren't cheap, so it doesn't sound very convenient to have to check the skies and the existing loads every time you want to turn something on.
And you're right that I'm dismissing using a bigger shunt before anyone has tried it. But that's because I have an uncanny ability to predict the future of such things, using the dark arts known as physics and maths.
Coulomb has pointed out the problems with one possibility -- keeping the same shunt resistance, or millivolts per amp, but with a higher power rating.
The other option, the one that offGridQLD suggested -- keeping the same maximum millivolts but using a 200 amp shunt -- has the problem that the amp, amp-hour and watts readings would only be a quarter of what they really are. But yes, the SoC figures could still be correct if you tell it the battery capacity is one quarter of what it really is.
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).