Best Solar Inverters


Based on performance, quality, service and value, from your experience installing solar, what are the best inverters on the market today?

See CER article on Best Solar Inverters 2018.


Comment from ā€˜Johnā€™ on CER article:

I have gone SMA all the way and never looked back.
SMA sunny Boy inverters just connect to their Sunny Island off grid inverter without any issues whatsoever.

It all just works.

We ditched all our Lead acid rubbish, 2.5 tonnes of lead replaced by 350 kilograms of lithium by a compny called BYD.

I cannot emphazize how good the Sunny Island with Sunny Boy 5.0TL inverters isā€¦forget all the seperate charge controllersā€¦blah blah.

So happy with 30kw of Lithium and SMAā€¦


Does anyone know how are invertors connected together?
In case there are 50 invertors (in 1MW power plant), how are they connected.
I doubt there are 50 cables that go to a transformerā€¦
If SMA is used (for example) does it have input from an invertor that comes before it?
My concern is that it cannot just be simply connected in series - since it is AC currentā€¦


Hello @miro ,
The way we connect multiples of inverters together is in Parallel.
We normally would have a PVDB, where all the inverters would run to, then a Main Cable from there Through a Inverter Supply Main Switch to the Grid.


We have been using Solar Edge almost exclusively for our projects in previous years.
We have had 14 optimizer failures and 3 inverters . If I would say the customer service is abysmal it would be a compliment. The last inverter replacement took 3 weeks and the customerā€™s system was down almost a month during peak product, and forget about trying to get paid. We are still waiting for payment from 2017 (5). The person who handles this is gone with no replacement. When we call tech service from the field we wait an average of 52 minutes. Donā€™t go near this company. We have switched to Fronius and are quite happy with this product and the built in datamanager


best inverters on the market today in my opinion are Sunpower micro-invertersā€¦ 25 year parts and labor warranty. But, you have to be a Sunpower dealer to get them.

When we use string inverters, we generally use SMAā€¦ but are seeing a recent rash of failures in M series installed 9-10 years ago. They seem to fail almost exactly at the 10 year markā€¦


what type of battery management/monitoring system do you use to keep your 30kw of lithium balanced (to prevent un-even or over voltage at end of charging?) Does it have active balancing at the cell level, or just the pak level with cell alerts?


Since I have used micro inverters for most of my residential installations, I have found that Enphase M12s and M250s to be very untrustworthy. I have had to replace 5 at one siteā€“they were only 2 years old. And 2 at another siteā€“only 1 year old. And, APsystems are not much better. My last installation using APsystems 600s. 4 of them were faulty right from the factory.


25 years labour and parts warranty?


Yes, Sunpower has 25 years Parts AND Labor warranty on modules AND micro-inverters! The micro-inverters are Sunpower technology, and pre-installed at the factory. The combination with Sunpower modules (with degradation warranteed to be less than 0.25% annually), gives homeowners the most production, with lowest risk = highest value!


Please get me their number or email address. Thanks.


Sunpower is the manufacturerā€¦ They sell thru authorized Dealer/Installers all over the country. visit, and find a Dealer in your area.


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