hot water heating partial eco solution

[dguzzi]

I'd like to add an electric "boost" to my gas water heating loop. That way I can turn the temp down on the main gas unit and heat as needed by an electric point of use unit. (or other type)
Can I hear some methods I might use? Background: Single family dwelling, natural gas unit is very new (so I'm not removing it), price of natural gas is very high here and I'll soon have solar panels.