• Have you tried out dark mode?! Scroll to the bottom of any page to find a sun or moon icon to turn dark mode on or off!

diy solar

diy solar

SMA Sunny Boy Smart Energy SBSE7.7-US-50 etc. on CEC list

Hedges

I See Electromagnetic Fields!
Joined
Mar 28, 2020
Messages
23,062
SMA just announced Sunny Boy Smart Energy hybrid, SBSE7.7-US-50 and lower wattage models now on California's CEC website. (Larger up to 11.4kW not yet available.) This makes them available for approval by PG&E (Haven't tried yet, might take time for their system to be updated.)

This inverter takes the place of the Sunny Boy GT PV inverter line, also the Sunny Boy Storage battery inverter line.
The available models accept 3x 600V 15A PV inputs and one HV battery (currently only BYD supported.)
As a hybrid, they can be overpaneled to 200%, e.g. 15kW of PV, with the power not backfeeding grid going to battery (up to 10kW charging.)

Prices seen at the moment range from $2800 (about the MSRP of Sunny Boy), up to $3800 or so. More than the street price of Sunny Boy, around $1800. I hope they will come down in the future, but there may be pent-up demand for a while.




Download Excel file (near upper right of page) to see additional columns, with UL 1741-SB certification etc.

I anticipate installing one or two of these for family & friends. Not battery initially but might add later.
BYD 32kWh battery is about $18k.

I've acquired enough Sunny Boy of recently discontinued model to do my own new system, but not the others.

I don't think either price or performance of SBSE is compelling, given other AIO/hybrid options. In particular, it will require external transfer switch and auto-transformer for backup operation (nearly doubling the price), and its surge capability will be no more than 120% or 125% of continuous. Quality and durability should be very good, like virtually all SMA products.

SMA America
mail

The new Sunny Boy Smart Energy has been officially added to the California Energy Commission’s Solar Equipment List!​


At the heart of the new SMA Home Energy Solution, the Sunny Boy Smart Energy combines the functions of a PV and battery inverter into a single unit. Its innovative design not only minimizes electrical upgrades but also provides homeowners with the flexibility to expand the system as their energy needs evolve.

For years, installers have chosen SMA for reliability, performance and innovation.

Today, we invite you to make that same choice again.
 
I can't select it in SolarAPP+ yet.
My PG&E NEM 2.0 reservations, one approved one pending, I can't go back and try to select this, even though the pending one they say I can still change capacity.

The SBSE 11.4kW is due out 4Q24.
I'm considering updating pending reservation for SB 7.7 + SB 3.8, as place holder for SBSE 11.4, or Midnight The One, or other larger inverter.
That would need to connect differently to comply with 120% or other rule for our 200A panel.

What hasn't been announced yet is what ABU Automatic Backup Unit or similar will go with SBSE, providing transfer switch and auto-transformer.
SBS gets ABU, about $2500 msrp each. Since the pair is going to cost $5000 or more for SBSE version, other brands in that price range are worth considering. Difference in surge capability, and price of 48V vs. 400V batteries also important.
 
just was looking up specs on the SB 7.7 and saw it was discontinued 0__0 ... I don't think the SBSE is a direct replacement! Give me back my SB 7.7 for my second array! lol
 
It is the replacement for SB, and for SBS. At a higher price.
I scrounged up the SB 7.7 and 3.8 I needed for my NEM 2.0 reservations. If you're patient you might see one.
One reservation was 7.7 + 3.8 as placeholder for SBSE 11.5, but I got a deal on some more SI so will add those for backup.
 
So in a couple years if I buy a SBSE, at a higher price, it is all I need to buy to extend my off-grid setup with another array having two SI's, one SB, and only FSM talking between them? I can just plop it in place, configure it for island mode inline with the other SB and be good to go? No extra hardware / wiring / COMS / etc required?
 
Last edited:
Yes, that should work.
Off-grid, so long as SBSE has "Island mode 60" not just "Rule 21" it should work well.
(I think it has that, can't remember if I heard for sure.)

If HV batteries become inexpensive, SBSE's ability to put up to 10kW into battery while delivering up to rated wattage as AC is attractive.
Of course the big question is how well it actually integrates with SI. New platform, new firmware.
Only the key functionality for primary use case will have been test well enough, if my experience with SBS is any indication.

But keep your eye open for new old stock or low mileage SB. I like to buy for $0.10/W (e.g. $500 for 5kW)
 
From the SMA site commissioning via the 360 app

1736170169941.png

I think I would rather have the SB7.7 though ... just keep everything the same in the system and not have a unique inverter out of the bunch.
Something in the current documentation makes it seem like a PITA to configure the SBSE in my situation but I can't recall what I read.
Not sure there will be many SB7.7 on used market though because SMA stuff are like beasts and I don't think I have even seen a 7.0 ... lots of 5.0's though.

What is considered a HV battery? My Zero electric motorcycle, V2 and V3 IIRC, had 119v DC nominal.
 
Off-grid, so long as SBSE has "Island mode 60"
I have an SB1.5 AV 40, nowhere in the SMA docs or the Modbus listing of the possible Grid codes did it mention Island Mode 50 which I need. I connected to it using Sunny Explorer and with my Grid code explored Gridcodes on the Inverter settings and found only a few possible Grid codes listed and the Inverter was set to the UK grid code as expected. So I changed it to the German grid code, rebooted the inverter and went back into the Grid codes and was presented with a long list including Island mode 60 and Island mode 50.

So if they have kept this 'Feature' and you can't find an Island Mode 60 then try changing to a different grid code and rebooting.
 
I think I would rather have the SB7.7 though ... just keep everything the same in the system and not have a unique inverter out of the bunch.

Not sure there will be many SB7.7 on used market though because SMA stuff are like beasts and I don't think I have even seen a 7.0 ... lots of 5.0's though.


What is considered a HV battery? My Zero electric motorcycle, V2 and V3 IIRC, had 119v DC nominal.


Hmm, that didn't help much!


That is for SBS. They could all be supported by SBSE, but considering firmware development and testing I would expect only some major and current models. At introduction it was only BYD.

The issue is communication compatibility.

There is a project with code o Git Hub to translate from EV packs (complete with EV BMS) to HV inverters including SBS. There are working systems.
 
$2k ...that is $400 more than what I paid for mine shipped NIB from reseller >__< ... inflation + collectors item I guess lol
 
Ask not how much it costs, but how much it will save you.

That's $850 cheaper than SBSE7.7-US-50


SBSE does have the benefit of higher current per input. Could parallel two PV strings of different orientations on each MPPT.
I look forward to when I can get them for $0.10/W like the new old stock Sunny Boys I bought.
 

diy solar

diy solar
Back
Top