Low Volts after running audio in parallel

[Takisbak]

After reading a lot I’m now realizing I probably shouldn’t run my new wet sounds sound system with the batteries in parallel, just checking with you guys to make sure that is my issue. I got a low volts warning and my port motor went “limp mode” I would call it after my batteries showed 7 volts. I wasn’t running the sound for very long maybe 45 minutes at 30% and if I had it cranked up to 80-100% boat was on for 95% of it. What should I do? Get new batteries or hook them up to a charger and see if they are still good? 7volts or amps seemed very low for them to be fine long term.
currently running two amps, 6 interior speakers 1 10 inch sub and 2 10inch towers.
Any advice would be great!

 

[Takisbak]

Boat is a 2023 AR220

 

[Marvin willis]

Sounds like bad batteries. Have u put a volt meter on ur battery to verify ur boat is reading the volts correctly.

 

[FSH 210 Sport]

After reading a lot I’m now realizing I probably shouldn’t run my new wet sounds sound system with the batteries in parallel, just checking with you guys to make sure that is my issue. I got a low volts warning and my port motor went “limp mode” I would call it after my batteries showed 7 volts. I wasn’t running the sound for very long maybe 45 minutes at 30% and if I had it cranked up to 80-100% boat was on for 95% of it. What should I do? Get new batteries or hook them up to a charger and see if they are still good? 7volts or amps seemed very low for them to be fine long term.
currently running two amps, 6 interior speakers 1 10 inch sub and 2 10inch towers.
Any advice would be great!

First, the paralleling knob is for emergency use only, it says so right on the knob, the BEP battery switch DVSR is designed to isolate your start battery and charge it first so the engines will always start.

Second, Im assuming you do not have an on board charger that you plug in after each outing? The charging systems in our boats don‘t produce a lot of charging power, so absolutely must charge your batteries after each outing, and leave the charger plugged in when not using the boat, the modern smart chargers automatic chargers will charge your batteries and then go into a maintenance mode to keep the batteries fully charged without over charging them. You need at least a two bank charger with 10 Amps per bank of charging power. Further, it is a good idea to re configure your DVSR to the storage mode so that when you turn the battery switches off the DVSR is not active so that your batteries charge independently, otherwise the DVSR will close as it sees “charging“ voltage. We can help you with this, it’s a very simple process.

You can read about the operation of the DVSR here;

https://www.bepmarine.com/-/media/inriver/710-140A_INSTR_BEP.pdf?modified=20230328095440

Lead acid batteries should not be discharged below 11 volts. Your batteries might be salvageable if you charge them fully, but if you drew them down to 7 volts and then left them sit they’re probably ruined.

I’m curious, did the boat start with the paralleled batteries at 7 volts?

 

[scokill]

As others mentioned, if you have that low of voltage your batteries are toast. I have two amps on this battery. https://www.batteriesplus.com/productdetails/battery/marine-and-boat/deep-cycle/bci-group-31m/sli31mdc I'm on my second one in about 8 years. Batteries are about specs, not brand or cost. I just plug in my onboard charger when boat is not in the water 24/7/365.