[RE-wrenches] Advice needed on upsizing a battery & grid interactive inverter stack

[Mick Abraham]

Once again, the Wrench List has proven to be a most valuable resource.
Thanks to all!

Mick Abraham, Proprietor
www.abrahamsolar.com

Voice: 970-731-4675



2010/8/9 Richard L Ratico <Richard.L.Ratico at valley.net>:
> Mick,
>
> SMA has something:
>
> http://www.sma.de/en/products/off-grid-inverters/smart-load.html
>
> Dick Ratico
> Solarwind Electric
> Bradford, VT
>
> --- You wrote:
> Step three is most intimidating to me: We need a way to control 240 volt AC
> heating elements in a fine pulse width modulated PWM fashion, to protect the
> battery from destructive overcharge in event of a utility blackout. I say
> 240 volt AC because the amperage goes off the chart if trying to divert big
> energy from a 48 volt battery. Mr. Ohm would tell us that it's better to use
> a higher voltage/lower amperage, and on/off control is less sparky with
> alternating current.
> --- end of quote ---
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