It gets pretty damn hot here in boise during the summer, snows in the winter too. I was told it wasn't needed but I do like to disengage the system when starting in when it's below freezing, something that isolator allows me to do.My interest is quite piqued. My last disappointment was from an IOXUS Super Cap. Although that may have been my fault since I mounted it under the tool box with no other protection from the South Texas heat.
I run a 4500 watt system of a stock alt and a GloweVoltage series 1 LifePo4. The GloweVoltage will support systems of up to 8000 watts on a stock alt.
Used to be that the Alt was the go-to but that isn't the case anymore. Grab a GloweVoltage Series 1 or 2, run it parallel with the primary and call it a day.
It's all you'll need to 8K on a stock alt. especially considering what a PITA an alt upgrade can be in newer cars.
My 2/0 gauge was already there, If you got it, use it is the motto I live by.I just did some research on these batteries. They are pretty amazing. They are designed like the batteries for heavy equipment, like electric forklifts. They hold 12v up until they are about 75% charge then the voltage starts to drop and a very steep slope.
With this battery, you can have a 5000 watt system, but you only need to run nothing larger than a 4g power wire. That's because your alternator and main battery will not be able to supply more power than what a 4g will provide. When your system is not being pushed, or played under what the alternator will provide, it will recharge the Glowe battery. Of course, from your Glowe battery to the amps, you would run much thicker wire.