Best battery to run 4 helix 12s, mega 360, hydrowave

[Rbalden]

Need some help with batteries. Finally was able to go and fish a full day on the water running all the electronics.
4 helix 12s, mega 360, hydrowave, and livewells. They are all running off the starting battery which is a group 27 with 750 cca (109ah). Boat lasted less than 8 hours on full charge until I had to jump the motor with trolling motor batteries. Need help finding the right setup so that I can run everything all day with out worries.

[bobcoy]

Group 27 with 109AH ? What brand and model? Group 31's are the only ones I have seen with 100+ Ah. I would suspect there is some kind of glitch in the spec's for your 27. (normal Ah for a 27 is 65 to 70 Ah)
A quality 31 size battery should handle 8 hours.

[Rbalden]

It’s an everstart 27DC.

[RGK456]

Batteries Plus X2 Group 31, about $400 after 10% online order discount. It’s a relabeled Northstar.

https://www.batteriesplus.com/produc...er/sli31agmdpm

[bobcoy]

The spec's are what walmart shows, but they do not say at what rate that is calculated or give reserve minutes. For a 50# battery 109Ah sounds like a stretch. I have not used that battery. Just going by my experience. The 12's are listed at 1.75 each. 360 and hydro wave are not much. but hard to guess on everything else. If you actually have true 109Ah After 8 hours I would say it could be risky to make sure the motor will turn over. Especially if your wet cell is over a couple years old. I would think a second battery or a super battery for replacement. Or maybe just a starter pac, but that will run close to the cost of your 27.
You could put a couple of the 12's in standby too. Bob

[Rbalden]

Batteries Plus X2 Group 31, about $400 after 10% online order discount. It’s a relabeled Northstar.

https://www.batteriesplus.com/produc...er/sli31agmdpm

what about lithium ? How do these compare? I think I’ve jumped in the rabbit hole

[RGK456]

what about lithium ? How do these compare? I think I’ve jumped in the rabbit hole

I did same, added second Helix 12 and M360 at the bow, only to find out my crappy Interstate Battery wasn’t big enough. And, Mercury doesn’t recommend Lithium for cranking battery. And I wasn’t willing to fork over $1000 for a lithium.