Aren't they under warranty?
Interstate covers marine deep cycles for a year and then nothing. I bought all three of these 13 months ago
Jethro from my experience, you likely have a bad ground. Do you have a breaker on your power? You should for these for several reasons. Are you using a barrel connector to connect/ disconnect power to the unit? Also Jethro I used to run the cheapest deep cycles ever with a 12v 55lb thrust unit. 2 group 34's, rv batteries from tractor supply. Would spot lock for 8-10 hours in total per day and never killed the batteries. I'm not using expensive agm's now and have literally been spot locked for more than 6 hours on a single reef.
That sucks!! I'd still try and get them to cover it... you have nothing to lose!
Geoff - LiFePo2!!!Quit BS’n around. Yea, LA batteries should never be drawn down past 50% or they degrade. Each time you do this. But we all do this!!The LiFePo2 batteries can be drawn down. And if you don’t draw them down, the allowable recharge cycles increase. This is why I decided on 200ah instead of 100ah.
Sam’sClubI bought the Duracell 31’s for $99 eachAnd my 200ah LiFePo2 was $1600 plus $400 for shipping.
Oh wow, I thought the 200ah would be way more expensive. I just emailed Jeff again. If it's $2k to get it to me, I may go that route.
Agm for me. They work. They can deep discharge and while I could afford the lithium I am uninterested in the pricing. Not to mention if you accidently puncture one of those lithium batteries in any manner your rig goes up in flames. Low chance but if it happens that's what you can expect...Jethro if you go Mac's route I want to hear all about it...and the challenges. God bless you Mac, back yard battery builders...made me laugh.
Mac, the research I've done shows AGM is slightly more resistant to deep discharge, you can discharge to 20% of capacity rather than 50% of capacity without damaging them. May fall under the "I read it on the the internet so it must be true" category though. All my batteries are in the back of the truck today, I'll bring them to Interstate this afternoon and see what they say.
Nope!AGM are LA batteries.Discharge below 50% and they go to nuts.