Barely fits 4, in fact if they haven’t changed anything, you would be wise to have them move the battery trays all the way forward on your initial setup. There was room to move mine forward about 2″, and had to pay to have that done last year after replacing the starting battery they installed with a Odyssey 31 series. Reason being I could not see the charger, its lights, or access the buttons with where they initially set the trays. If I had known about this before they set the boat up, would have been part of the normal setup. Also, even though they originally added a 6 port elec terminal on the initial setup to help with so many wires going to the battery, I had them add a second when they moved the trays as I still had a bunch of wires going to the starting battery and I wanted that cleaned up further. I can now see the charger, the lights, and just get at the buttons. One positive thing for you is, while they upgraded my locator wiring to 10ga, from the stock 12ga for me, I’m pretty sure all new boats with 200 hp and up this year are coming with 8ga wiring standard from the factory. My son has ordered a new 2060, and hopefully its a nice new wiring setup. You are going to have to give up part of a compartment if you want a 5th battery unless something has changed. I just installed a Helix 15 and was worried about the power draw. Set the brightness on 9, and haven’t had any issues.