Installed this on a 1 acre pasture about 6 months ago.  Also installed a good 6' ground rod with a double wire connection to the charger.  The horses learned real quickly not to go near the wire.  It has been showing "max" charge every check on it. I feel like the metal housing will last longer than the one we replaced, which burnout in the sun.  I love the capacity meter and the solid feel of the on/off switch.

update 18-jan-2016.  The battery lasted about 2-1/2 years so it's time to try a replacement.  The clear plastic of the meter has gone yellow, and I can barely see the needle anymore.  Disappointed with that but my previous brand didn't even have the meter, so it was better for a while.
Installed this on a 1 acre pasture about 6 months ago. Also installed a good 6' ground rod with a double wire connection to the charger. The horses learned real quickly not to go near the wire. It has been showing "max" charge every check on it. I feel like the metal housing will last longer than the one we replaced, which burnout in the sun. I love the capacity meter and the solid feel of the on/off switch. update 18-jan-2016. The battery lasted about 2-1/2 years so it's time to try a replacement. The clear plastic of the meter has gone yellow, and I can barely see the needle anymore. Disappointed with that but my previous brand didn't even have the meter, so it was better for a while.