36v to 12v

[DJSmiley]

Likely that stepdown is not sufficient. Both diesel heater and fridge at startup will easily exceed the 20A at 12V.

Also, that 20A are 'Chinese amps': More likely to be 10A continous in real life.

I would suggest
- Sizing up to a 40A version
- Getting a proper branded stepdown
- Maybe try adding a big capacitor to overcome inrush current, but I'm not sure if that thing actually can handle that properly.


Personally I would consider a normal 12V setup. Li-ion scooter cells, crap breakers, a cheap powMR solar controller and all thown in a box... Fine if you run it with a 50ft wire outside your house, so if it goes wrong you're safe, but in all other situations I won't even dare to run it unattended.

 

[Kamaleon91]

Here's a few more pictures of my set up

 

[MisterSandals]

Here's a few more pictures of my set up

Are the voltages of the battery packs all the same?

 

[Kamaleon91]

Likely that stepdown is not sufficient. Both diesel heater and fridge at startup will easily exceed












































































































































































































































Also, that 20A are 'Chinese amps': More likely to be 10A continous in real life.































































































































































































































































I would suggest































































































































- Sizing up to a 40A version































































































































- Getting a proper branded stepdown































































































































- Maybe try adding a big capacitor to overcome inrush current, but I'm not sure if that thing actually can handle that properly.































































































































































































































































































































































































Personally I would consider a normal 12V setup. Li-ion scooter cells, crap breakers, a cheap powMR solar controller and all thown in a box... Fine if you run it with a 50ft wire outside your house, so if it goes wrong you're safe, but in all other situations I won't even dare to rThe breaun it unattended.































































































































Likely that stepdown is not sufficient. Both diesel heater and fridge at startup will easily exceed the 20A at 12V.































































































































Also, that 20A are 'Chinese amps': More likely to be 10A continous in real life.































































































































I would suggest































































- Sizing up to a 40A version































































- Getting a proper branded stepdown





























































- Maybe try adding a big capacitor to overcome inrush current, but I'm not sure if that thing actually can handle that properly.































































































































































































Personally I would consider a normal 12V setup. Li-ion scooter cells, crap breakers, a cheap powMR solar controller and all thown in a box... Fine if you run it with a 50ft wire outside your house, so if it goes wrong you're safe, but inThe all other situations I won't even dare to run it unattended.































































Likely that stepdown is not sufficient. Both diesel heater and fridge at startup will easily exceed the 20A at 12V.































































Also, that 20A are 'Chinese amps': More likely to be 10A continous in real life.































































I would suggest































- Sizing up to a 40A vers































- Getting a proper branded stepdown































- Maybe try adding a big capacitor to overcome inrush current, but I'm not sure if that thing actually can handle that properly.































































































Personally I would consider a normal 12V setup. Li-cooter cells, crap breakers, a cheap powMR solar controller and all thown in a box... Fine if you run it with a 50ft wire outside your house, so if it goes wrong you're safe, but in all other situations I won't even dare to run it unattended.
















































The solar controller is no longer that one I have a bougeRv 40a mppt controller the breaker is being changed as well but im pretty sure it's not the cheap powMR or the cheap breaker







That' causing my issues

 

[Kamaleon91]

The solar controller is no longer that one I have a bougeRv 40a mppt controller the breaker is being changed as well but im pretty sure it's not the cheap powMR or the cheap breaker that's causing my issues

 

[Bud Martin]

So right now do you have any 12V loads that can pull 20A to verify that the Buck converter can really put out 12V at 20A per published spec.?

 

[Kamaleon91]

I don't have anything 12v that pulls that much but I don't think it's putting out the 20A

 

[12VoltInstalls]

I don't have anything 12v that pulls that much but I don't think it's putting out the 20A

This is an essential tool imho. It will tell you.

 

[MisterSandals]

I am still wondering what the 12 pack voltages are. It’s apart and would be nice to rule out battery issues while it’s easy.