[gtojohn]

All electric home, if you don't already have a heat pump I'd compare your cost of replacing your outdoor unit with a heatpump vs the extra solar string. The average minimal heat pump uses about 1/3 the power of electric strip heat. That could be considerable since most strips are 10-15kw and bigger systems have mulitple strips. Its usually cheaper to make things more efficient than to add panels to generate more power. Remember the utility company buy back of solar isn't much. Because the usual utility rate structure is tiered, the first 500kw or so of usage is often very cheap, much cheaper than over building your solar. Our kw rate doubles after the 500kw. From a cost payback standpoint I recommend just enough to keep your average low bill inside the cheap energy tier.