I'm hunting the best price on a Victron SmartSolar MPPT Charge Controller 100 volt / 20 amp 12/24V with BUILT IN BLUETOOTH
The best price I can find is $169.00
At
www.ebay.com.au/itm/Victron-SmartSolar-MPPT-Charge-Controlle…
Can anyone beat that?
I can't help directly, but when I picked out my 30A mppt a couple years back from Aliex for ~$130 or so, I saw many cheapies were just mppt emulation in circuit, not big heavy transformers inside which are necessary. So double check.
Mine is 'Epever, Chaser', 4kg, about 10" long.
This one is 0.65kg, and about 4" long.
Maybe you are looking at a near useless overpriced emulated charge controller? I hope I am not misleading you.
This mppt 30A is $23.34. Which may be like yours inside.
https://www.ebay.com.au/itm/30-100A-MPPT-Solar-Panel-Regulat…
Here's my type, $154: but can get it cheaper.
https://www.ebay.com.au/itm/Epever-MPPT-Solar-Charge-Control…