[RE-wrenches] DR Power curve

[Larry Crutcher, Starlight Solar]

Hi Bob,

This does not answer your question but may be of interest. Over the  
years we have found that customers will operate 2 to 3 kW inverters  
just to run 50 to 100 watt loads. Most of the time the inverter AC is  
also connected to many parasitic loads. Combine that with the low  
efficiency of operating a large inverter at low power and the  
following makes much sense.

We recommend and install small dedicated sine wave inverters. For  
instance, a refrigerator needs power 24/7. A well made inverter, like  
an Invertek 600 watt, can power this load and leave the main inverter  
off line. Lots of people are using CPAP breathing machines all night.  
For under $100 we can put in a sine wave inverter that does double  
duty during the day charging laptops, shavers, toothbrush or any small  
load that needs to operate for extended periods. This has worked very  
well in conserving power.

Just some food for thought.

Kindest Regards,

Larry Crutcher
Starlight Solar
(928) 941-1660
Renewable Energy Products, Service and Installation

Mailing Address (NO SHIPPING):
11881 S Fortuna Rd.
#210
Yuma, AZ 85367

Shipping and retail store (NO MAIL):
2998 Shari Ave
Yuma, AZ 85365



On Apr 21, 2009, at 8:04 AM, robert ellison wrote:

> Does anyone have a power curve for a DR 2412 inverter?
>
> I need to show a customer that it is not 94% effecient with a 10  
> watt ac led pluged into it alone.
> I am betting that it needs 500 watts to get into the 75 or 80% range.
>
> Thanks,
> Bob

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