20-40? We talking walk-in refrigeration?
Laptop 4 or Netbook 2
Stereo car receiver 1.5-2
Raymarine depth/speed/wind/ap computer with AP and radar 5-10
LED lights 2 all-on
We're still not quite at 20.
Add 3A for a smal Danfoss powered fridge, and subtract 1.5 for 50% duty cycle. MAYBE we're hitting 20 peak.