12v regulator

[dgadee]

I switch things off if I am not there.

Has the OP checked the voltage output from his 240/12 volt power supply for the unit? he may find it is in excess of 12volts and the unit will run quite happily at 14volts. These unit usually have an operating voltage range e.g. 9-15 V. Is there a voltage on the unit data label?

I did. Exactly 12v. No info or documentation about voltage range.

 

[Alan S]

I'm pretty sure your monitor will work just fine direcr from the lithium. 12V equipment is usually designed for nominal 12V input ie 11 to 15 or thereabouts. If I were you I would suck it and see. You said it was just a cheap monitor anyway ; )

 

[noelex]

This is a great video if you are interested in the basics of running devices directly from DC:

 

[dgadee]

I'm pretty sure your monitor will work just fine direcr from the lithium. 12V equipment is usually designed for nominal 12V input ie 11 to 15 or thereabouts. If I were you I would suck it and see. You said it was just a cheap monitor anyway ; )

Ha. It is monitor No 2. Not sure what I did but smoke exited monitor No1. Electrons! Not my thing.

 

[noelex]

Ha. It is monitor No 2. Not sure what I did but smoke exited monitor No1. Electrons! Not my thing.

Removing an AC brick that supplies 12V DC and replacing it with a direct 12V DC supply from the house bank will often (but not always as you unfortunately found out) work at least in the short term, but for long-term reliability or security with complex or expensive electrical devices, a DC to DC converter is a better solution. These converters are not expensive.

The exception is devices that specify a range of input voltages well above and below the maximum and minimum expected house voltages. In this case, direct connection is usually safe. The other application for direct connection is simple devices that are inexpensive enough where a shorter life is not a great concern.

 

[dgadee]

The new regulator arrived but not fitted yet. My RPi card seems to have gone. Pypilot took me 75 miles yesterday but OpenCPN couldn't read the card. Today card not readable.

I wonder if there are spikes. Never happened before. Only changes are lithium battery and Victron DC DC charger.

I may go 12v pc again for navigation. But Pypilot is good though needs the RPi.

RPi should have sorted proper disk access for V5. Too hobbyist just now.

 

[SeaCoyote]

On medical vehicles they use 12V to 12V voltage stabilizer. It protect the entire electronic such as your Pyplot or your monitor, and absorb peaks when starting your boat. While big battery packs can absorb heavy load, it's better to make a starting sequence like an aircraft, starting the instrument one by one. Victron model is nice but i run away of mofset system. Less robust at sea. Instead i have intalled a DC-DC stabilizer from Alfronix : PowerVerter Voltage Stabilisers, Voltage Converters | Alfatronix Ltd | United Kingdom and a smart battery splitter from Baywatt : 12V 140A Smart Battery Isolator (VSR) Splitter Charger . So far i am very happy with this setup up. The next step for bigger boat is DC-DC charger -> But careful, you need to have a + signal input to link with your alternator. So for that, don't take from Marine industry but from Truck industry (way more reliable).

 

[geem]

It's the solar panel that keeps it charged. Anyway, off for a few weeks so will see how it copes with fridge and autopilot in real life.

What are you mppt setting for your lithium? There is no need to have the lithium at a constant 14v. Once charged, the MPPTs should be setting back to float at something like 13.4v

 

[dgadee]

No idea. I just used the basic setting. I think it is maybe when the engine starts up. Couple of times yesterday wind went down and I motor sailed.

Here's the solar settings:

 

[geem]

No idea. I just used the basic setting. I think it is maybe when the engine starts up. Couple of times yesterday wind went down and I motor sailed.

Here's the solar settings:

View attachment 198317

Why is the float set to 8v? Set it to 13.4v I would also set the absorption to 14v. That would drop the voltage to your electronics to 14v and may reduce the risk of spikes. Set the dc/dc to the same settings

 

[dgadee]

Why is the float set to 8v? Set it to 13.4v I would also set the absorption to 14v. That would drop the voltage to your electronics to 14v and may reduce the risk of spikes. Set the dc/dc to the same settings

Do you have a float voltage for lithium? I thought not. But I know very little.

Have the regulator online now.

 

[geem]

Do you have a float voltage for lithium? I thought not. But I know very little.

Have the regulator online now.

13.4v would be below the natural lithium float voltage. I think you need to get everything set up correctly. You are using a user defined set of parameters but not considering all the settings

 

[dgadee]

I noticed that. No idea why. I go 'default' for any option.