[RE-wrenches] Off-Grid Sizing Case

[jay peltz]

Hi Mark,

I'd install as much PV as I could afford, a MPPT controller and a battery capacity meter to keep an eye on things.
And if they are still looking to throw money around then a new generator as Allan suggested.

jay

peltz power

On Dec 3, 2009, at 9:22 AM, Mark Frye wrote:

> Folks,
> 
> I have a customer with a 3 year old system  in northern CA:
> 
> 8 - Deka 370AH, 6V, 2x4 banks - 740Ah @ 24V 
> 2 - DR2424 120/240V series 
> 4 - EC-120-GL 
> 1 - C40 CC 
> 1 - 5000W, old portable gas gen
> 
> The problem is increased gen runtime probally due to chronic undercharging.
> 
> Based on estimated consumption in the home, I think he needs about 2X the PV to meet the energy production needs in the summer (5 kWH/day)(30% DOD/day). But in order to get C10 charging during the summer he would need 5X the PV?
> 
> Money is and issue. So what should I recommend:
> 
> 1 - Increase PV 4X to 5X, add MPPT controller to get to a PV based system with gen support 
> 2 - Get a 3K to 5K propane gen and and run as a gen based system with PV support 
> 3 -? 
>   
> Mark Frye 
> Berkeley Solar Electric Systems 
> 303 Redbud Way 
> Nevada City,  CA 95959 
> (530) 401-8024 
> www.berkeleysolar.com 
> 
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