Post by Allen Aska on Dec 18, 2022 16:31:50 GMT -8
I'm not familiar with electronics, but the mentioned has a 0.02 Ohm shunt resistor instead of 0.1 Ohm which says that will let it measure high current.
I have a 100watt 12v solar panel connected to a 12v battery that runs 12v loads. I understand the original 0.1 Ohm can't handle more than 2A but how many Amps can the High Current one handle? Can it handle measuring the current of a 100 watt 12v solar panel?
Next question is, if my solar panel is 100 watts 12v and my loads are 12v and less than 15 watts is the high current one likely not a good match for measuring my battery & loads? If it's within 10ths I'd be find with that. As in, if the high current one will tell me my loads are using 15.2 watts that will be fine... I don't need to know I'm using 15.22 watts for example. Thanks
100w panel at 12V means a possible total of 8.3Amps going through the 0.02 ohm resistor.
However, this is very unlikely your system will handle that much charging current. I'd need to know the maximum charging rate of your system. Assuming it is 2A, then P = I^2R = 0.32W. That's a lot for a chip resistor that is spec'd at 0.25W, but it's probably ok.
Could you take a look at the product number code on your board (or post a picture)?
I've got another INA3221 board that has 0.01 resistors which could handle about 4A. Let's see what version you have and I might be able to swap you out.
Post by Allen Aska on Dec 19, 2022 11:08:49 GMT -8
I just ordered the "High Current INA3221" yesterday (order 5844) and a label has been printed. Maybe you can swap it out before it's actually sent to USPS? My order was 5844. Is that what you mean by picture?