Re: $2/kwh is a lot of money
> As it stands at the moment my solar is useless during a power cut because the system disconnects at mains failure to avoid putting power into the grid
With a straight solar install, no mains also means no solar...
Battery systems have an "emergency power supply function" (aka UPS) that switches in when there is a power outage.
>'Correctly sized' is the issue
Being 'techies' and comfortable with maths, we spent far too much time analysing data... Because the batteries are largely used overnight, it is this usage data you need, as that is what your batteries will be called upon to deliver. However, daytime draw is also a consideration, as you really want your panels to recharge the batteries and at the same time supply your home.
But then perhaps being the US its a one size fits all approach to home batteries, so whilst we in the UK debate whether to have a 2.4 or 4.8kWh battery (£500 more), there 24kWh is the smallest battery unit.
Biting the hand that feeds IT
