I have a mppt 100/20 controller and I want to add a dc/dc charger 12/12/30. I will have 400ah of battery with 200 watts of solar. Is this mppt enough or should I bump it up? Any guidance on this is appreciated.
The MPPT is sufficient for the amount of solar that you have. Whether you need more solar depends on you usage and battery chemistry /type. Not sure what you plan to do with the dc/dc charger but the additional power would certainly be helpful.
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