One inverter or a couple?

[microage97]

What is the best way to approach circut design? A inverter for each or a big one for entine system? Or somewhere inbetween?

Dave

[microage97]

Opps I must be getting old. I asked this question before.

[Mike90250]

one smallish inverter for the small loads, and one large inverter for the large loads ?

[microage97]

I was thinking about going with this inverter: http://www.amazon.com/gp/product/B00...A2CK5NG72UVSTT and using one for each circuit. It is listed a 90% efficient and .8 amp no load draw.

[microage97]

But that doesn't seem to be all that great. Still learning.....

[paulcheung]

Those cheap inverters will kill your batteries in short time as the low battery cut off are preset at 10.5 volts and can't be adjusted.

[microage97]

Thanks for the tip! I am thinking going eith 24V or 48V bank. NOt sure yest still learning.

[Sunking]

Is this a battery system? If so multiple inverters is the right approach.

[microage97]

Thanks! Yes it will be completely off grid. Not sure how large to size it. basically we are talking 2 LCD desktops + laptop + 32" LCD tv + internet routers ect used all day long + maybe 100 watts of cfl lighting used for like 3 hrs total a day. THis is in Hawaii so sun isn't too much of a concern but hard to get a handle on estimates since my fridge, stove and water heater are all electric but the place we are building will be all propane except fridge being a concerted chest freezer.

[Beanyboy57]

Is this a battery system? If so multiple inverters is the right approach.

One section of my smallish roof faces North East and the other section faces North West (southern hemisphere). I have a PV array on both sections with separate inverters. The North east PV array catches the early morning to afternoon sun, the North West PV array catches the mid morning to late afternoon sun. This design averages 18kwh per day. I have Sunny Boy inverters which I would recommend as they have an extended warranty.