Somewhat related, but I found this article helpful if you are chosing DIY vs turn key product: (https://www.explorist.life/goal-zero...03%2D4%20hours
So here's what explorist.life claims about the two:
DIY SOLAR VS GOAL ZERO – COST EQUIVALENT
If we were to build a DIY setup similar to the Goal Zero Yeti 1400, I’d need a 50 amp charge controller, an Inverter/Charger, a 100aH Lithium Battery.
Just with those parts, we’ve already racked up a hardware bill similar to the price of a Goal Zero Yeti 1400.
Let’s move on:
If we were to build a DIY setup similar to the Goal Zero Yeti 3000, I’d need a 50 amp charge controller, an Inverter/Charger, 2 x 100aH Lithium Batteries.
With those parts, we are already at the same price point as the Goal Zero Yeti 3000.
What I’m trying to say is… the DIY solution is not more cost effective than the Goal Zero Yeti Units for comparably sized systems under 200 amp hours.
Now, that example is sizing your system according to your budget, which is fine… but it’s a REALLY good idea to size your system according to your actual power usage. That’s why you need to do a power audit.
If your power audit comes back saying you’ll need less than 100 amp hours per day and you’ve got a hard budget of $1600 to accomplish your camper electrical goals, the Goal Zero Yeti 1400 is going to be the best bang for your buck.
If your power audit comes back saying you’ll need less than 240 amp hours and you’ve got a hard budget of $2500 to accomplish your camper electrical goals, the Goal Zero Yeti 3000 is going to be the one for you.
GOAL ZERO OR DIY SOLAR?
Yes/No Questions to ask yourself:
Do you want 500+ watts of solar panels?
Do you want more options on what solar panels you can use?
Did your power audit recommend more than 240 amp hours?
Is charging via the vehicle alternator a high priority?
Is getting a full charge overnight a high priority?
Do you want your system to be modular for future system expansions?
Is the Budget for your Electrical system over $2500?
If you answered YES to any/most/all of the first 6 questions and you answered YES to the last question, a DIY solution is going to suit you much better. If you had mainly NO’s in your responses, a Goal Zero Yeti 1400 or Goal Zero Yeti 3000 is going to be a better option.