I have a Verado with full electric power steering. Plus cooler, music, lights plotter, VHF, pump for inflatables, etc. The demand for power is huge. The BEP system is highly regarded. I fitted one two years ago with two batteries and it has been faultless.
This is the unit Power Store
And this article explains how it works and looks at some alternatives Battery Rigging for Verados: The club recommendation
The other part of the equation is a really good set of batteries. AMGs are the way to go for relaibility and these are highly recommeded. (Again I use them)
Not a cheap option but a proper solution, very reliable and a great safety feature. Not being able to start your engine at the start of a day out is a pain. Not being able to start it halfway through is much more worrying!