We've seen such poor reliability with the Ecogens, that we can't
recommend them anymore. We've seen as high as 50% failure rates in full
time off grid use as backup. Charging batteries for hours is a very
hard load and does not compare to biweekly exercise mode. The failures
have been fairly catastrophic, resulting in blown motors.
The other issue with these types of pad mounted generators, as Allan
just mentioned, is that they need to be pulled and taken into the shop
for major repairs. This can quickly add another $500 to $1000 to the
cost, to have a tech with a crane pull it, truck it in, and then
reinstall it later. I'm actually just recommending a good quality
portable generator for this reason in many cases. At least the customer
can take it in themselves if there's a problem.
The alternative is to get into the bigger (>20 kW) units with water
cooled motors and 1800 RPM operation. I was surprised when I compared
fuel consumption, the big units can actually use less fuel than an
Ecogen when charging with dual inverters. The wildcat is interesting,
but I'm not ready to recommend a manufacturer I've not heard of before.
Another option I have not tried in cold weather, is diesels. I have
clients in warmer places with Kubotas that have offered excellent
service. I have clients in Alaska that love their diesels, but I'm not
sure what they've done to cold proof them.
Ray Walters
Remote Solar
On 10/19/2021 1:13 PM, Sindelar Solar wrote:
Gary,
Interesting that you bring up Generac in response to my request. The
customer for whom I made this request for recommendations has a dead
Generac EcoGen 15kW at her property now. I don't know what's wrong
with it; it had failed before she bought the property. But she had it
checked out and was turned down for a service call at her home, told
instead that it would have to come into the shop and that basically
the cost of repairs was more than replacement cost. So another EcoGen
isn't likely at this point.
Even on Generac's website, there are a surprising number of 'one-star'
reviews for the EcoGen 15 (the EcoGen 6 is discontinued). The one at
my own home, an early EcoGen 6 that Generac gave me around 2010 in
return for evaluation and review, had a throttle solenoid fail with
relatively few hours on it. So I remain cautious about Generac products.
Thanks for your reply, though.
Allan
On 10/17/2021 8:58 AM, Gary F Willett PE wrote:
Allan:
DISCLAIMER: I have no business or financial relationship with any
Generac dealer.
I have owned two Generac EcoGens in the past 10 years and am pleased
with their performance. The EgoGen is configurable using an option
setting to use either LP or NG fuel. It is warranteed for the
off-grid environment, with a 500 hour recommended interval for
routine maintenance.
Even though I live in an urban area, I setup my PV system in the
grid-tie battery backup configuration. I have always used LP for fuel
instead of natural gas because of some issues we've had with natural
gas reliability here in north Texas under extreme winter weather
conditions (last one here was in mid-February).
I use my EcoGen only as a battery charger in a grid-down situation,
it does not serve house loads directly. I'll admit that most of the
hours on my generator are the bi-weekly exercise runs!
I started with the 6kW 240V AC EcoGen as a field trial participant in
Generac's beta testing of the EcoGen in an off-grid environment in
2010. Later I upgraded to the 15kW kW 240V AC model. I very pleased
with this model too.
So, consider Generac as an option too.
Regards, Gary
On Sat, 16 Oct 2021 20:32:35 -0600, Allan Sindelar
<[email protected]> wrote:
Mac, I appreciate your suggestion, thank you. Indeed, I called a
longtime regional independent generator dealer about this before
posting here. I was surprised that he has Kohler 12s and 14s in stock
and available. I’ll go that route if I don’t hear better from our
fellow Wrenches.
Allan
On Oct 16, 2021, at 7:29 PM, Mac Lewis <[email protected]> wrote:
Hi Allan,
I suggest finding a local long-standing generator technician and see
if they can help provide the generator. We see so many generators
bought online with no way to get service because there are no local
and qualified service technicians to service that brand. If you buy
from a local technician, or at least ask for their advise, it may
allow you to get service in the future (maybe).
We have had good success with Kohler 14 RESA or RCA machines, they
do have off grid warranties, but good luck getting them now.
Let us know what you decide.
Thanks
On Fri, Oct 15, 2021, 4:42 PM MD Electric & Solar
<[email protected]> wrote:
Check out Wildcat Generators, hand built in Kansas.
I just placed my first order for one. 10KW LPG 1800RPM liquid
cooled, built to run 24/7. They even make a DC (battery direct)
generator.
You can purchase through a master dealer in the Reno Nevada
area, Freds Mountain Electric:
https://fredsmountain.com/
https://wildcatpowergen.com/
On Fri, Oct 15, 2021 at 3:37 PM Sindelar Solar
<[email protected]> wrote:
Wrenches,
Generators have become a moving target, especially for off
grid applications. Most are set up for grid backup, and I'm
assuming that many may simply be unavailable, given that
half of most everything else is on back-order with no
expected delivery date... I'm seldom asked to recommend a
generator these days, but I am today, so I'm requesting
recommendations from other off grid-savvy Wrenches, please.
I'm working with an older (2014?) existing dual Outback
VFX3524 system which will be upgraded to dual VFXR-3648s to
work with a 16kW Blue Ion LiFP battery bank; 4kW array with
upgrade infrastructure in place to later add 2kW more if
needed. Once the upgrade is done I expect relatively little
generator runtime. The customer would prefer LP fuel and
2-wire start (for remote control). Pretty much any
well-regarded model in the 8-14 kW @240 VAC rating range
could work.
Thank you for your suggestions!
Allan
--
*Allan Sindelar*
[email protected] <mailto:[email protected]>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*
--
Michael D Nelson
MD Electric & Solar Inc.
Office: 707-884-1862
Cell: 707-684-0064
www.mdelectricsolar.com <http://www.mdelectricsolar.com/>
www.facebook.com/mdelectricandsolar
<http://www.facebook.com/mdelectricandsolar>
--
*Allan Sindelar*
[email protected] <mailto:[email protected]>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*
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