[RE-wrenches] Request for Gennie Recommendation

[Dave Palumbo]

Chris,

 

It would be very helpful if you quote "run hours" rather than "years". 

 

For example we have seen:

.         Inexpensive small generators (generally not worth rebuilding) 300
to 500 hours. These are gasoline models of various brands and Generac LP gas
models. 3kW to 10kW in size typically.

.         Honda gasoline generators 2,500 hours and then rebuild. 

.         10kW Kohler water cooled diesel gen set still operating within
specs at 9,600 hours (rebuilt after 5,500 hrs). This has been in service for
16 years, the first 4 years without inverter/battery system, and another 6
years before the client had us add a PV array to the system. Since adding
the PV array the generator has run 200 hours per year.

All are in off-grid service and loaded at 65% MAX continuous (see some
surges higher than 65%, typically run at 60%, or below, of rated power).

 

David Palumbo

Independent Power LLC 

462 Solar Way Drive

Hyde Park, VT 05655

www.independentpowerllc.com 

NABCEP Certified PV Installer

Vermont Solar Partner

24 Years Experience, (802) 888-7194 

 

 

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Comet
Systems
Sent: Monday, January 16, 2012 10:21 AM
To: Howie at catamountsolar.com; RE-wrenches
Subject: Re: [RE-wrenches] Request for Gennie Recommendation

 

The Generac QT and commercial units do not come with an ATS, you can buy
just the bare machine or have a complete solution designed for your load.

 

The Generac residential machines are good machines, as long as you
understand the intended use. We install lots of them. They are only designed
to be used occasionally, for residential backup. We get customers who want
to run their business all day on a 10KW residential generator and are
disappointed that the generator won't last ten years. They are a cheap,
lightweight and cost effective solution for people who get occasional
outages.

 

If your customer has worn out two generators already, then (s)he needs to
pay for a commercial level product. A 22KW QT is not that expensive and will
last ten years at a substantial load factor. If you give me more information
on the location, load factor and loading, I can have engineering recommend a
solution for you.

 

 

-- 
Chris Mason

President, Comet Systems Ltd

masonc at cometsystems.co

www.cometsystems.co

Cell: 264.235.5670

Int: +1305.767.2094

Skype: netconcepts

 

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