I dont remember exactly. It was a plastic cheapo compass and think did have arrow pointing to N.Compasses don't point north. They align with the Earth's magnetic field, save for any local magnetic fields which may overwhelm that. Depending where you are magnetic north can be quite some azimuth angle away from true north.
True North is easy to determine;I use google earth to look over my house to find a couple of things I can use as a "true north" reference.
Eg. a line drawn from the corner of the shed to a tree stump, then you can put a magnetic compass over that to get an "offset" measurement
This will give you an approximate North. To get true North you need to choose your marking times with care - they need to be same number of hours before and after solar noon, and also the shadows need to be cast onto flat ground, or ground with a slope that is all facing true North (or true South).True North is easy to determine;
Put a stick in the ground and make a mark where the tip of the shadow falls.
2, 3 or 4 hours later make another mark where the tip of the shadow falls.
The line between the two points indicates East and West. 90° to that line, and with the Sun to your back, is True North in Northern latitudes. In Southern latitudes you'll have the Sun in your face.
You can get deep cycle agms from costco. (just an fyi so you can explore all your options).Thanks for the recommendations.
Will consider AGM also.
A lot of my concerns about fire and explosions would be mitigated if the batteries, inverter and MPPT (everything) was stored outside. The problem for the batteries is that it sometimes (but not often) gets down to about 10° F here in the Winter. I'm sure I'd feel really safe if they were stored in a 1" thick steel vented box. There are plenty of photos of batteries and controllers mounted on...wood! That is not safe or smart. Even using some Hardi-backer board would be helpful.