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<font face="Arial">The KACO blueplanet 1502xi inverter has a minimum
MPPT voltage of 125Vdc but cannot be connected to a battery.<br>
<br>
I would not recommend hooking a battery up to the input of just
any grid tie inverter unless it was designed for it.<br>
The current from a battery is significantly higher than that of a
PV array and can damage the inverter or cause it to fail in a way
which could be unsafe.<br>
<br>
Sincere regards,<br>
Richard Scott<br>
KACO New Energy<br>
</font><br>
On 11/16/2010 10:34 AM, Peter Parrish wrote:
<blockquote cite="mid:6E673E9D98204966A11A72F11AD7C7DC@Angeles"
type="cite">
<pre wrap="">Bob,
So he is grid-tied. But his household loads are all 100 Vdc? I wonder how he
charges his battery bank…If it is PV with a charge controller (or wind),
then I think he can export to the grid and get both a rebate from his
utility and a Federal Tax credit. I assume that he is not interested in
powering the 20 HP motor for his sawmill! If he is charging his batteries
some other way (small hydro) I don’t know about the incentives.
But it looks like he is staring at a fully charged battery bank with
generation to spare and is thinking “Why not sell this juice to my utility
company? Fair question. I have no direct experience with the SB700, but it
has been around for eons, and presumably is rock solid and can MPPT at 100 V
all day long. The Fronius inverters only work down to 150 V. The Exeltech
inverters that I am familiar with work down to 200 V. There must be lower
voltage, grid tied inverters out there but the “battery backup” versions
assume 24 Vdc or 48 Vdc battery banks. So, with the exception of the SB700,
there seems to be a gap between 48 V (maybe 60 Vdc) and 150 Vdc.
- Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
<a class="moz-txt-link-abbreviated" href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
________________________________________
From: <a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On Behalf Of bob ellison
Sent: Tuesday, November 16, 2010 5:23 AM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] 120 volt grid tie inverter
Peter,
The fellow is living with a 120 volt DC battery bank, using it to power his
place and a 20 HP motor on his sawmill.
He wants to reduce the electric bill further than he already has.
So we are looking for an inverter that will take 120 volt DC nominal from
the panels / batteries and send it to the grid.
I am supposed to meet him tomorrow and hope to have more info afterwards.
Thanks,
Bob Ellison
From: <a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On Behalf Of Peter
Parrish
Sent: Monday, November 15, 2010 8:38 PM
To: <a class="moz-txt-link-abbreviated" href="mailto:glenn.burt@glbcc.com">glenn.burt@glbcc.com</a>; 'RE-wrenches'
Subject: Re: [RE-wrenches] 120 volt grid tie inverter
Bob,
Do you mean they have a nominal 120 Vdc input? Or do you mean that they want
a 120 Vac (RMS) output? If the former, what output voltage do you want? If
the latter, what is their nominal dc input voltage (better yet the range of
DC input voltages over a range of typical temperatures and irradiance
values)?
- Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
<a class="moz-txt-link-abbreviated" href="mailto:peter.parrish@calsolareng.com">peter.parrish@calsolareng.com</a>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
-----Original Message-----
From: <a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On Behalf Of Glenn Burt
Sent: Monday, November 15, 2010 5:29 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] 120 volt grid tie inverter
I think there is still an SMA 700W inverter available that uses 120VAC.
-Glenn
-----Original Message-----
From: <a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On Behalf Of Bob Ellison
Sent: Monday, November 15, 2010 11:14 AM
To: RE-wrenches
Subject: [RE-wrenches] 120 volt grid tie inverter
I have a customer who wants to grid tie a 120 volt dc system
Does anyone know of an inverter that can do this?
Thanks
Bob ellison
</pre>
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</pre>
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<pre wrap="">
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