Recent content by wholybee

I disagree. Although they might not be suitable for outboard engines with smaller less sophisticated alternators. But for inboard engines or RV's etc. they should be fine. Many people are already using non-starter rated drop-ins connected to engine alternators without problems. Only they aren't...

That you see voltage bounce around between 14-18 volts is concerning. That actually sounds like the battery had already gone into protection. If the battery had not gone into protection, then the voltage would not fluctuate, but would sit at the voltage of the battery. In protection, the battery...

There are endless answers as to what can be done politically or by regulation. But you, personally, there is one thing that stands out far and above any other. Don't have kids. Over the next 50 years, there isn't anything you can do that is worse for the environment than having kids. If you have...

They are mostly likely just fine as starter batteries. If you also use them for "house" loads, maybe/maybe not. The first consideration is that many new "dumb" alternators do have a temperature sensor, which solves one of the biggest issues. Second, as a start battery, it is always full...

The Lithium with BMS is actually safer for powering devices that must always be on like bilge pumps. If the LFP battery is run down, the BMS turns of and your bilge pump stops working. That isn't good. But if the Lead Acid battery runs down to such a low voltage that the pump won't run, you...

I have not every heard of a boat needing to be signed off by an ABYC inspector. I'm not sure such an inspector even exists. Most insurance policies require a survey within 3 years to start a new policy, but a Marine Surveyor doesn't normally hold any ABYC certifications. Rather, (in the United...

Before E-13 was released the discussions I read were using examples like an electric powered boat that suddenly lost propulsion in tight quarters and that could cause a collision. It really isn't much different than lead acid. An overcurrent situation blows a fuse. Voltage drops below 11V and...

To truly alarm before the BMS disconnects requires a BMS that has that feature, and that will always only be on the more expensive BMS units. Prices will come down, but the cheap ones will never have that feature. There just isn't much demand for it as a it is a niche within a niche. I don't...

ABYC does not require such an alarm. You could have nothing and still be ABYC compliant. ABYC does has a recommendation for one, but without any specifics. As, such, any alarm you install that you are happy with will work.

Yes, I know that, but when you order a 120A BMS from a cheaper source, maybe you really get the 80A and never know unless you remove the heatsink. That is my point. For a few extra dollars, I know I am getting what I really ordered.

200% might seem like a lot. But it's $50 on top of a battery bank that may cost thousands. And the risk is real. I bought "the same" JBD BMS from Amazon as a test unit for another project. When I removed the heat sinks only half the FETS were populated on the board. It would easily pass as the...

I think you are wrong in assuming it will be low cost. That is the main thing. The smart shunt is a very limited device. It doesn't even have the relay the more expensive display has. You are talking about a hardware change that probably involves a more powerful microprocessor, a larger...

What brand batteries, and do you have a way to see the individual cell voltages? If you disconnect the 4 batteries, are they all charged to exactly the same voltage? If the cells are out of balance, with one or two cells charged over 3.5V, and the other 2 cells below 3.5V, then a small change...

It's a relay. With both N/O and N/C connections. In my other post, I said that you can connect the battery to the common terminal, and it will provide a voltage. But it is just a relay. You can connect it to the Y cable (you will need the pinouts and signal descriptions of the wires) and it...

Just looked up the EC-AGS+. See page 13 of the manual, it supports a remote start/stop switch. Connect that to the relay on the BMV-712. https://www.cummins.com/sites/default/files/2021-05/A065F574_I2_202106.pdf