[RE-wrenches] Hybrid inverter with no battery

[Harry Mahon]

Sam - the SMA Backup Select is available for order from Authorized Distributors, but has not begun shipping (will likely be closer to Q4). Should be well under $1000.

Sunny Boy Smart Energy had the Backup Secure (old SPS) function to provide 120Vac power to dedicated outlet(s), requires manual operation with dedicated switch.
Can use Backup Secure with or without battery connected to inverter, up to 1,920W. Can also use with rapid shutdown on array, requires SMA Backup Start card accessory 9installs inside inverter) in that case.

The new SMA Backup Select is an accessory that is an MID with included backed up loads panel.  Still only 120Vac power in an outage, but automatic switching and powers up to 7 circuits in house (no need to move plugs).  Also can operate with or without battery, with or without rapid shutdown, up to 3,840W for 3.8-7.7kW SBSE inverter, up to 5,760W for the 9.6/11.5kW SBSE models.
Datasheet: https://files.sma.de/downloads/BU-SLCT-US-50-DS-en_us-11.pdf
Installation Manual: https://files.sma.de/downloads/SMABackupSelect-IA-en-10.pdf

SMA Backup Home (full power of inverter in outage, 240Vac backed up loads) is likely not going to be available this year unfortunately.

Best regards -
Mike


Michael Mahon (he/him)
Solar Academy Manager  |  SMA America
+1 916 918 9412
SMA America<https://www.sma-america.com/> | Solar Academy<https://solaracademy.sma.de/en/> | TechTip Channel<https://www.youtube.com/playlist?list=PLoiOll7F4i-_Wc4JVN8ga2x2vxc8xews_> | Upcoming Academy Trainings<https://solaracademy.sma.de/en/courses.html?filter%5b1%5d=English&filter%5b2%5d=United%20States>
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From: RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> On Behalf Of Sam Haraldson via RE-wrenches
Sent: Friday, August 1, 2025 7:09 AM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Cc: Sam Haraldson <sam at onsiteenergyinc.com>
Subject: Re: [RE-wrenches] Hybrid inverter with no battery

I have installed two of the SMA Sunny Boy Smart Energy hybrid inverters but only in a conventional solar-only, grid-tied design without batteries.

https://www.sma-america.com/products/hybrid-inverters/sunny-boy-smart-energy

There is a separate SMA Backup Select box required for off-grid backup operation and I have not laid eyes on it in person.

- Sam

[OnSite Energy]<https://onsiteenergyinc.com/>
Sam Haraldson
Operations Specialist
(406) 551-6135
1515 N. Rouse Ave Bozeman, MT 59715
Locally owned and operated since 2012
[B Corporation]<https://onsiteenergyinc.com/bcorp>

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