Vanner [RE-wrenches]

[Lawrence Elliott]

Joel.

I have three Vanners out now for about 10 months.

1 off grid
2 grid intertie with backup..


Negatives.
They have a problem staying on line in sell mode. Frequent shut downs
although I suspect primarily due to the overly agressive and in some
cases silly regs in UL1741.
Had two that "leaked  FET smoke" for unknown reasons.
Slow response from Vanner engineering in truly solving the grid tie
problems although they have been working on it and now may have solved
the problems in 48vdc models.
The units are still not ready for prime time in off grid mode due to
lack of generator start or ability to reliably charge from generator.
Remote is not very intuitive and clumsy in navigating the menus and
setups.
My opinion is manuals need complete rewrite.
Bad habit of display lockup when left in certain modes for lenghty
periods.
CD software included is better but still could use some work.
One customer is certain that the inverter has been responsible for
killing a second Grudfos SQ pump but I am not convinced.
Pump installer would like it to be so.



Positives

In one of my installs with 3 kw wind and 2.4 kw PV in sell mode we have
seen as high as 70% overall efficiency in passing 4kw to the grid and at
times 6kw peaks at slightly less efficiency
Very clean power, good surge capability in backup mode and very quiet.
Ergonomically much easier to install than Trace SW and much cleaner
overall without optional conduit box.

Both customers are satisfied except for the fact that they will not act
as a UPS due to fault when grid goes down and they still have too
frequent grid drop outs per day.
(as many as 6-7 times per day with 5 min restart times)

By synthetic battery they mean a small bank of electrolytic capacitors
that allows the inverter to deliver power when grid goes down and sun is
shining.
Very limited due to lack of any real capacity in the caps so any
variations in load can easily drop inverter off line.
I have suggested they look at 2-3 thousand farads Ultracaps to improve
performance.
My opinion is that it has limited usefulness as SunLynx product and has
a hefty price tag.


Refuse to sell additional units until bugs are worked out.

Larry Elliott






> Vanner advertises the Sunlynx SLX as a non-battery "system" with a
> "synthetic battery." Anyone using this device? What is a synthetic
> battery?
>

>
>

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