neighbors sharing PV charge [RE-wrenches]

[Matt Tritt]

Eric,

Just to add my two cents-worth - a single AC source (like a stacked pair for
instance), larger battery bank and a few more modules would be way more
efficient and way less expensive than splitting the DC inputs. For that
matter you could have two un-stacked inverters sharing the same battery.

Matt T
----- Original Message ----- 
From: "William Korthof" <wkorthof at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Tuesday, August 19, 2003 12:13 PM
Subject: Re: neighbors sharing PV charge [RE-wrenches]


> I would definitely prefer the 1-system approach, but if  you need two
> systems with a connection for redundancy, how about tying the two
> battery packs together (48 volts) through a connection circuit,
> perhaps 60 amp C/B on both ends. You'd want to make sure the
> linking wires are large enough for the circuit breakers (ie #6 awg
> minimum for 60 amps), and large enough to have the right level of
> voltage drop (ie, with a difference of 10 volts between the packs, you
> might want the link current to be at 60 amps). Voltage drop should
> be low enough to allow useful power flow and also low enough that
> a short circuit would definitely trip the breaker, but not so low that
> you're buying excess wire.
>
> wk
>
> At 05:14 PM 8/18/03 -0700, you wrote:
>
> >Howdy wrenches,
> >
> >Does anyone have any experience with using a single PV array to charge
two
> >somewhat distantly separated battery banks?  We built a system for a
> >weekend cabin up here last year and now the guy's neighbor wants to
> >install his own battery and inverter system but tie in to the existing
> >array for charging.  There is room on the rack to expand to cover both
> >their needs and it would be difficult to site a new array for neighbor
> >#2.  They are good friends and want to share resources.
> >
> >I thought about using the C-40 in load control mode to float battery #1
> >and then dump the charging current to another C-40 at battery #2.  But it
> >seems like there might be a better solution.
> >
> >Its a 48V system and the distances are reasonable, so voltage drop should
> >not be a concern.
> >
> >Any suggestions?  Thanks,
> >
> >Eric Youngren
> >
> >[Non-text portions of this message have been removed]
> >
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