I been running on SRNE 12 kw 3 phase inverter for a year now with minor problems. With the latest thunderstorm it got hit through the incoming AC lines and shut down. It still works off grid if I cut out the AC connection and only run on batteries. That could work during dry sunny season but not so good in rainy season. When they no longer sell this inverter it obviously been problems with it. 

 

So need a new inverter soon. I'm thinking of DEYE 15 or 20 kw. The reason for the 20 kw is to get more amps from batteries on each phase without inverter switching to grid or shutting down as the old SRNE sometimes did. I have 12 kw of panels. Missus sometimes use too much amps in the kitchen and together with water heaters it gets above 7 amps on some phase. 

 

Anyone see a problem with oversize inverter? Another question that I think was up here earlier regarding DEYE, to connect everything to the backup load connection instead of the using the CT to avoid feeding back to grid. This is how old inverter is connected and that would be easiest to do as cables are already in place. 

 

Appreciate your Thoughts.

Deye are well regarded in the international DIY solar community.

 

The only possible issue with going over-size would be increased inverter self consumption, but being future proof is a significant advantage.

 

We have 4 x 5kW single-phase units running in parallel. We did have small issue due to a local (20m away from the inverters) lightning strike but it was only a configuration corruption, no actual damage.

Im always been worried for lighting strikes to hit be the AC line so I did not connect AC to my inverter. I switch manually when needed from inverter to AC. I maybe done less than 10 times in 2 years. Its not a 100% solution, if thunderstorm hit  when Im not home at the moment as an example of that.

 

 

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