SMA Sunny Boy inverter with SPS (Secure poer supply)

[Naptown]

I'm trying to figure out which way to go... I've decided on 34 300lg's instead of SP 335's... I have lots of roof, and they extra $$$ for the SP panels will prob have a 10year (+) payback.. so lg's it will be ...but do I go with the sma's, or the solar edge... while my roof is not a perfect southern exposure , its real good for producing power, no shading ... I installed 17 327's SP's panels at my sons house, and he has a perfect south view... not a tree with 500feet... and the installer used solaredge

just wondering which way to go, and is one more $$$ then the other

Solar edge is generally not in the Sunpower offering of inverters.
That may have to do with the rapid shut down requirement in the 2014 NEC.
SMA , ABB and Fromius are just now catching up

[kaeley]

My idea with a SPS is to use a remote power supply like a computer battery back up to connect to SPS and then charge things from it or use small electrical things and keep it charged during the day with the solar power SPS feature. I need computer battery back up anyway and it would also act as a surge protector and give me a smooth power supply for small items. At 1500 watts and 15amps I don't expect to run major appliances for that I have two 2000 watt Yamaha inverter generators that you can wire together that give 25 amps and 4,000 peak watts which can run my fridge.

[inetdog]

The SPS installation cost about an extra $150 installed. It appears to be an easy thing to do. However to keep the warranty I would let the installer do it. He is the SMA video that shows the installation of SPS

https://www.youtube.com/watch?t=192&v=BaJP4P8pikg

My biggest objection is that he mentions that #18 wire is sufficient (in terms of VD only) to run up to 75 feet, but he does not mention the minimum wire size required by the NEC for a branch circuit (#14 in most cases.)
My second objection is where he said that a GFCI is not needed since there is built in overload protection in the circuit. That is not why a GFCI would be installed and it does not provide any overload protection in the first place.

[SunEagle]

The SPS installation cost about an extra $150 installed. It appears to be an easy thing to do. However to keep the warranty I would let the installer do it. He is the SMA video that shows the installation of SPS

https://www.youtube.com/watch?t=192&v=BaJP4P8pikg

Sounds like that $150 is worth spending to get full function out of the SPS option. I would just be careful what load you connect to it during a grid outage.

You want to make sure your load is first "not critical" and second can handle intermittent power outages should clouds come over for brief periods.

Not a problem for some lighting or fan loads but I would not run any type of compressor load (small fridge or A/C unit) because they do not like to see intermittent power.

Even some cheap battery chargers will "restart" their charge at the beginning should power be interrupted during a cycle.

[kaeley]

I am not dissing the SPS feature and I really like and support the products made by SMA.

What I said was that if there is additional costs (like the receptacle and wiring) needed to take advantage of the SPS option I would have to weigh that cost to what a small portable generator costs me that will provide me "hours" of the full 1500 watts of power anytime of the day. If my outages were mostly during the sunny part of the day then I might lean towards the SPS but my outages are usually when the sun isn't shining so the SPS option is not as justifiable to me than maybe others.

The SPS installation cost about an extra $150 installed. It appears to be an easy thing to do. However to keep the warranty I would let the installer do it. He is the SMA video that shows the installation of SPS

https://www.youtube.com/watch?t=192&v=BaJP4P8pikg

[SunEagle]

How do you dis the Sunnyboy SPS feature when compared to all other grid-tie inverters, at least it is working somewhat during an outage? Its a standard feature that doesn't cost anything extra on an inverter that has competitive pricing, the best reliability in the industry, and dual MPPT inputs. Yes, it doesn't work at night, will struggle to keep 1500w going in cloudy weather, and you should have some kind of alternate power if you really need power in an emergency, but for most people - a little solar power during an outage will put them way ahead of everyone else.

I am not dissing the SPS feature and I really like and support the products made by SMA.

What I said was that if there is additional costs (like the receptacle and wiring) needed to take advantage of the SPS option I would have to weigh that cost to what a small portable generator costs me that will provide me "hours" of the full 1500 watts of power anytime of the day. If my outages were mostly during the sunny part of the day then I might lean towards the SPS but my outages are usually when the sun isn't shining so the SPS option is not as justifiable to me than maybe others.

[solarix]

How do you dis the Sunnyboy SPS feature when compared to all other grid-tie inverters, at least it is working somewhat during an outage? Its a standard feature that doesn't cost anything extra on an inverter that has competitive pricing, the best reliability in the industry, and dual MPPT inputs. Yes, it doesn't work at night, will struggle to keep 1500w going in cloudy weather, and you should have some kind of alternate power if you really need power in an emergency, but for most people - a little solar power during an outage will put them way ahead of everyone else.

[kaeley]

If you'd like to see some real world data for how useful the SPS might really be, you can look on PVOutput for systems like yours and see how much of the day they are producing power. For example, here is a 4 kW system in 94112 that has panels facing east and west. That tends to lower the peak power, but stretches out the amount of the day that useful power is generated.

Summertime is OK, but a good day in winter will get above 1500 W for maybe 5 hours per day, and above 1000 W for maybe 7. On a cloudy day like this one it might be tough to keep any load going.

Well I have a flat roof with no shading, however I do live in a foggier area, zip is 94121. My idea with a SPS is to use a remote power supply like a computer battery back up charge things from it and recharge it with the SPS. I need one anyway and it would act as a surge protector and give me a smooth power supply for small items. At 1500 watts and 15amps I don't expect to run major appliances I also have a 4000 watt inverter generator that can run my fridge. It is the Eagle scout or small time preppper in me.

[SunEagle]

If you'd like to see some real world data for how useful the SPS might really be, you can look on PVOutput for systems like yours and see how much of the day they are producing power. For example, here is a 4 kW system in 94112 that has panels facing east and west. That tends to lower the peak power, but stretches out the amount of the day that useful power is generated.

Summertime is OK, but a good day in winter will get above 1500 W for maybe 5 hours per day, and above 1000 W for maybe 7. On a cloudy day like this one it might be tough to keep any load going.

Cloudy days or minimal sunlight has always been a stumbling point for me to understand getting the SPS feature.

Unless you get a lot of power outages during the "sweet spot" of the day that SPS will not provide much in the way of power for any length of time. Especially during a storm or at night when I get my power outages.

So depending on the cost of everything you need to make the SPS option work, IMO a small inverter generator might be better justified.

[sensij]

SMA says this is a 15 amp 1500 watt outlet that connects to their inverter. This would be handy to charge phones, laptops and smaller needs. It doesn't have enough watts to run my fridge but it is better than nothing.

If you'd like to see some real world data for how useful the SPS might really be, you can look on PVOutput for systems like yours and see how much of the day they are producing power. For example, here is a 4 kW system in 94112 that has panels facing east and west. That tends to lower the peak power, but stretches out the amount of the day that useful power is generated.

Summertime is OK, but a good day in winter will get above 1500 W for maybe 5 hours per day, and above 1000 W for maybe 7. On a cloudy day like this one it might be tough to keep any load going.

[solarix]

I vote for SunnyBoy. Should be a bit less $$ than SolarEdge, and has the SPS feature. Hands down more reliable too.

[paris401]

I'm trying to figure out which way to go... I've decided on 34 300lg's instead of SP 335's... I have lots of roof, and they extra $$$ for the SP panels will prob have a 10year (+) payback.. so lg's it will be ...but do I go with the sma's, or the solar edge... while my roof is not a perfect southern exposure , its real good for producing power, no shading ... I installed 17 327's SP's panels at my sons house, and he has a perfect south view... not a tree with 500feet... and the installer used solaredge

just wondering which way to go, and is one more $$$ then the other

[ButchDeal]

That's SPS, Secure Power Supply, not SMA. (Auto-correct??)

corrected my post for clarity. Thanks

[kaeley]

SMA is the manufacturer and SPS does stand for secure power supply. My poor typing skills left out th ew.

[inetdog]

No they are all the same size SMA, 1500watts. With your system being larger, to get the SMA you would have to have TWO smaller inverters to get it as well.

That's SPS, Secure Power Supply, not SMA. (Auto-correct??)