.
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Carl Emerson
Sent: Tuesday, March 26, 2013 5:29 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] P1 micro performance
Friends,
Keeping the record straight.
I need to
Friends,
Keeping the record straight.
I need to say that I have had correspondence 'off list' from a development
engineer from a prominent manufacturer who assures me that his product is
designed to run 'flat out' 24/7.
The unit in fact is just coasting at it's maximum power rating.
Nick,
Is Enphase going to be introducing to market any time in the near-term a new
micro with a higher output? It seems very likely that the trend toward
higher output mods will continue. The M215 will surely be left behind to a
greater degree as this trend continues if there are higher and r
to a customer is like trying to explain photovoltaic equipment to the
> general
> public.
>
> As a competitor to Enphase .. I'm not coming to their defense. However,
> what Nick said (below) IS fact.
>
> Whether you elect to believe this or not is up to you.
>
>
> Reg
Marco,
I still challenge those who believe that “some clipping is good” to make their
case.
Well, the way you've phrased it, you've made my job pretty easy-- though
it seems to me that several folks have already done this for you.
Some power limiting at some point over the 25-year life of
Fellow Wrenches,
No stones from this Missouri P.E. Perhaps if more Greybeards gave such
candid comments it might influence others toward something other than a
race to the bottom.
Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094
On 24-Mar-13 12:07 PM, Ray Walters wrote:
Hear, Hear, Car
Hear, Hear, Carl.
That has also always been my experience as well. In my off grid work,
reliability trumps budget, and I almost always over size charge
controllers, relays, inverters, fuse holders, etc. Most failures seem
to be related to pushing the design limits of the equipment.
I spent t
>From Dan at Exeltech:
Trying to explain in depth the "how and why" slightly larger PV is of benefit
to a customer is like trying to explain photovoltaic equipment to the general
public.
I still challenge those who believe that “some clipping is good” to make their
case. And as far as the g
said (below) IS fact.
Whether you elect to believe this or not is up to you.
Regards to all,
Dan Lepinski, Senior Engineer
Exeltech / Exeltech Solar Products
With 41 years experience as a design engineer in solar energy.
--- On Sat, 3/23/13, Marco Mangelsdorf wrote:
From: Marco Mangels
Whether you elect to believe this or not is up to you.
Regards to all,
Dan Lepinski, Senior Engineer
Exeltech / Exeltech Solar Products
With 41 years experience as a design engineer in solar energy.
--- On Sat, 3/23/13, Marco Mangelsdorf wrote:
From: Marco Mangelsdorf
Subject: [RE-wrenc
aper" overly self-serving.
marco
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nick Soleil
Sent: Thursday, March 21, 2013 8:04 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] P1 micro performance
Good points David, we ar
Good points David, we are in peak season for inverters to be limiting
power.
Marco, your diagram shows that the modules are only overproducing the
Enphase M215's output of 225 watts for a single 15 minute period during the
day. That would only equate to about 3 watt-hours of lost power on a day
w
hes-boun...@lists.re-wrenches.org] On Behalf Of David Brearley
> Sent: Friday, March 22, 2013 8:43 AM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] P1 micro performance
>
> Thanks for the clarification.
>
> FWIW: Flat topping is exactly what occurs. Inverter limiting clips the
It would be good to quantify the amount of peak
energy that is lost through power limiting. We
have a 2160 Watt array on a 40 degree pitched
roof with a SB 2500HF US inverter. The other day
I watched the meter hover over 2000 W and peak at
2490 W. It was a clear, cold day. It runs in the
STC
Engineer
Exeltech / Exeltech Solar Products
--- On *Thu, 3/21/13, David Brearley
//* wrote:
From: David Brearley
Subject: Re: [RE-wrenches] P1 micro performance
To: "RE-wrenches"
Date: Thursday, March 21, 2013, 11:37 PM
Thanks for sharing the screen capture, Marc
1/13, David Brearley
//* wrote:
From: David Brearley
Subject: Re: [RE-wrenches] P1 micro performance
To: "RE-wrenches"
Date: Thursday, March 21, 2013, 11:37 PM
Thanks for sharing the screen capture, Marco.
Interesting issues to think about here. This is actually p
1/13, David Brearley
//* wrote:
From: David Brearley
Subject: Re: [RE-wrenches] P1 micro performance
To: "RE-wrenches"
Date: Thursday, March 21, 2013, 11:37 PM
Thanks for sharing the screen capture, Marco.
Interesting issues to think about here. This is actually p
ditional increase
in the output for an increase in available energy at the input. Think
"governor"
on an engine
Thanks.
Dan Lepinski, Sr. Engineer
Exeltech / Exeltech Solar Products
--- On Thu, 3/21/13, David Brearley
wrote:
From: David Brearley
Subject: Re: [RE-wrenches] P1 m
Thanks for sharing the screen capture, Marco.
Interesting issues to think about here. This is actually prime clipping season
in many places (not sure about Hawaii) due to the cool weather. While there are
more sun-hours in the summer, the cell temperatures are often high enough that
you won't t
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