EcoRenovator - View Single Post - Off-the-grid with grid-tie inverter?

Xringer · 10-12-11, 12:31 PM

Timers work. I use one on my oil burner and save big bucks on oil and a little on electricity.

I have the basic 'default' NStar residential rate, so I'll have to check out their website
and see what they offer for for off-peak plans these days.

The last time I looked, I wasn't using mostly electric heat, and I was using less kW hours..

Have you looked at the actual losses in your system. How many watts of heat are
lost when charging and then converting the DC back to AC later on??
I've heard systems recover 85% of the power used to charge in good systems,
but if the charge and discharge rates are real high, efficiency can drop to 60% pretty quick.

Is your system breaking even? (when compared to grid cost).

10-12-11, 12:31 PM	#52
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	Timers work. I use one on my oil burner and save big bucks on oil and a little on electricity. I have the basic 'default' NStar residential rate, so I'll have to check out their website and see what they offer for for off-peak plans these days. The last time I looked, I wasn't using mostly electric heat, and I was using less kW hours.. Have you looked at the actual losses in your system. How many watts of heat are lost when charging and then converting the DC back to AC later on?? I've heard systems recover 85% of the power used to charge in good systems, but if the charge and discharge rates are real high, efficiency can drop to 60% pretty quick. Is your system breaking even? (when compared to grid cost).