I'm looking for ideas on a quick and dirty way to make a cheap load tester for a 18V 20A boost converter, ideally with household parts that I can salvage. My first thoughts are electric kettle elements in a bucket of water but I believe they are around 10 ohm so I'd need around 10 to get the amperage i'm looking for. Also possibly electric radiator fans, a little outside of their usual operating voltage but I think they should be fine. Has anyone made something like this/any recommendations for testing circuits with high amperage? All of my projects so far have been max 5A so any input is welcome
A little bit of background info behind the project:
I'm looking to add a 21700 Li-ion battery pack to my car to run a centre console fridge almost indefinitely and charge it from the alternator and possibly a small solar setup. The pack will be 4S (16.8v) and around 30AH. I haven't actually purchased the cells yet, however I've found uncycled tesla 21700 cells around the same price as used ex laptop batteries, but the customisable size/shape as well as the cost and life is the rationale behind going with them, 4S as 3S's voltage is too low for the fridge and I'd prefer to do the voltage conversion on the charge side to get the most out of the pack. To charge this correctly I'll need an input of 16.8-18.1V which means I need a boost converter to up the alternators voltage, I would also like it to charge at around 20A (post voltage boost so around 25A on the input) or as close to as possible. I've linked a boost converter I'm looking at below, but I'd like to do some testing on it before I hook it up to my battery pack as I've found most of these converters are electrically noisy and I'd prefer to still be able to listen to the radio in my car.
Boost converter I'm looking at: https://au.banggood.com/1500W-30A-D...yCh1jFA9XEAQYAyABEgKob_D_BwE&cur_warehouse=CN
TIA SimpleJoe
A little bit of background info behind the project:
I'm looking to add a 21700 Li-ion battery pack to my car to run a centre console fridge almost indefinitely and charge it from the alternator and possibly a small solar setup. The pack will be 4S (16.8v) and around 30AH. I haven't actually purchased the cells yet, however I've found uncycled tesla 21700 cells around the same price as used ex laptop batteries, but the customisable size/shape as well as the cost and life is the rationale behind going with them, 4S as 3S's voltage is too low for the fridge and I'd prefer to do the voltage conversion on the charge side to get the most out of the pack. To charge this correctly I'll need an input of 16.8-18.1V which means I need a boost converter to up the alternators voltage, I would also like it to charge at around 20A (post voltage boost so around 25A on the input) or as close to as possible. I've linked a boost converter I'm looking at below, but I'd like to do some testing on it before I hook it up to my battery pack as I've found most of these converters are electrically noisy and I'd prefer to still be able to listen to the radio in my car.
Boost converter I'm looking at: https://au.banggood.com/1500W-30A-D...yCh1jFA9XEAQYAyABEgKob_D_BwE&cur_warehouse=CN
TIA SimpleJoe