pclifton wrote:<snip>There are APS, Sunny, Chilicon Power and now Magnium Energy has a new storage-ready micro-inverter (Micro GT-500) too.<Snip>
Do you have an opinion about SolarEdge ?
I think SolarEdge is a very good option. We have a few threads on SolarEdge here that you can review:Solar Edge Optimizers?SolarEdge HD-Wave Inverter TechnologyFailed SolarEdge optimizer causes entire string to fail
That last link recently had a drive-by posting which read:
12345678t wrote:I have a small commercial system that is about 4 months old. and have had 6 optmizers fail to date. System was working fine and just today tripped offline.
The bottom line is that we know that all of the options for module-based optimization will experience some failure rate. The question is this: Which ones are best? My spreadsheet
attempts to quantify Enphase microinverter real-life MTBF numbers. It's not perfect, but I believe it is in the ballpark for the M190s. It should be closing in on the M215s and M250s. Additionally, it gives you an idea of the RANGE of experiences different users have. How much of that is related to the installer rather than the manufacturer is anyone's guess. (Don't discount the ability of a sufficiently-bad installer to ruin the reliability of your equipment! GetOffYourGas suspects that might account for his issues, at least partially.)
But there is NOTHING to compare against the Enphase results on my spreadsheet. While it's true that the M190 failure rates are way too high, it currently looks like the failure rates for the M215s and M250s are quite good. Unfortunately, we do not have nearly enough data for the S280s to form any opinion. We know that the architecture is completely different from the M215s and M250s, but we also can expect that Enphase has applied all of their experience to try to reduce field failures.
I suspect the same type of analysis I have done with Enphase could be done with SolarEdge, but I have not pursued it.QueenBee has this little bit of information on APS.
Since you have not included your location in your signature, it is difficult to for us to say whether or not the S280 would be sufficient for 340W PV modules. My original installation employed PV modules rated for 20% more power than the microinverters were capable of producing and the production throughout the year was only reduced by a nominal amount (likely less than 1%). Your power ratio is only slightly higher, so your result should be similar or better if you live at a similar or lower latitude where temperatures are higher.
The bottom line is that if I were installing 340Wp PV modules, I might be inclined to go with 300W or 400W Optimizers from SolarEdge and purchase a central inverter that could take a battery from either Tesla or one of their competitors. (Just beware that adding the battery will both increase the initial cost AND the recurring cost, since it will likely be the least durable component.)