[RE-wrenches] Low voltage DC v. higher voltage DC

[Harry Mahon]

Marco -

The Sunny Boy Storage "Advanced Backup Unit" accessory or ABU will be discussed at SPI in a couple weeks - first units are being stocked now at our warehouses in US.  The ABU will allow the SBS to be a grid former in case of utility outage, however there are no plans to have any generator inputs/controls to allow for battery charging from generator.

And yes, BYD BBox HV 5.12/7.68/10.24 devices will be supported when available in US (will be this year I understand)

Mike

-----


The SMA Sunny Storage looks promising.



It will be able to work with the LGC RESU10 HV battery and, sooner rather

than later I hope, BYD package as well.



And it will allow for a backup generator tie in.



Ta-dah!



marco



On Thursday, September 13, 2018, Bruce Erickson <bruce at mendocinosolar.com<http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org>>

wrote:



> Hi Marco,

>

> I partially agree with you. I recently bid Outback, StorEdge, and Pika

> options for a GTBB customer, partly to understand pricing for myself, and

> found OB to be so much more expensive. The customer really wanted a system

> that would be to be able to charge the batteries off a generator in an

> outage, understandably. But the extra thousands in cost for OB ended up

> being prohibitive. Add-on rapid shutdown is a killer. So he's opting for a

> nice modern high voltage DC system, with optimizers and built-in RSD, but

> when there's an extended outage, he'll have to hope the sun comes out right

> after the storm to recharge the batteries, or he'll end up in the dark

> again, until the grid comes back. Maybe there's a high voltage inverter

> that allows generator charging, or a third-party battery charger, that I'm

> not aware of. Otherwise high voltage systems are very limited for backup,

> at least in winter storm scenarios.

>

> *Bruce Erickson*

> Mendocino Solar Service

> PO Box 1252

> Mendocino, CA 95460

> 707-937-1701

> 707-937-1741 fax

> bruce at mendocinosolar.com<http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org>

>

> *Connecting Mendocino County to Solar Since* *1994*

>

>

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