SMA specifically says they can go to 42V.
This is a link to the SI5048 Installation and Instruction Manual:

http://download.sma.de/smaprosa/dateien/7995/SI5048U-TUS091012.pdf

It is a 6 Meg. file.
See page 92.

Vaseline & lead. I have observed what may be lead oxide on battery terminals.
It's grey to black crud. Seen lots of it on lots of auto batteries over the
years. Car barely cranks,
remove cable from post, brush both well to restore shiny lead surface, coat
everything with vaseline, reassemble. Vehicle will often crank 100% better and
start. Vaseline prevents this problem from ever happening again.
Do not be concerned about getting it on mating surfaces. Is this starting to
sound like a pun? ....Nevermind :-)

Dick
Solarwind Electric

--- You wrote:
Yes, I've had a 48 v system survive a dead cell (Outback inverter), but 24 or 12
v systems are done.
So I guess the Sunnyboy can go down to 42 V?

R. Walters
ray@solarray.com
Solar Engineer
--- end of quote ---

