Fuel Engine Toggles?

[Elijah of Worldbuilding]

so I am wondering how to create a toggle for a fuel engine to kick on (power generating directly to batteries) when the battery is under 75 percent. I know that i can do that part easily, but I am wondering how to get it to turn off and not consume any fuel once the batteries are charged over the percentage.

the context is that I am trying a laser raft for adventure mode and thus resources are scarce.

[DreamScape]

This used to be a basic setting. Now.. Its complicated but nice.
Breadboard or specific Engine name control ACB.
Instead of an all in one control you can have sets of engines activate as needed.
You just gotta dig into ACB control or learn Breadboard.
Theres some Breadboard builds for engine control on the Discord.
Place copy and name and your ready to go.
Me i would suggest breadboards. They can control not only output and where it goes. But also RPM and whos on and off under what circumstance.
All in one block. Plus many many other features all tied into a crazy cluster buck of controls commands and parlor tricks to amaze and confound anyone who witnesses your builds.

[MemeMachine86]

Create two ACBs. There should be a condition setting for when battery capacity is lower than a percentage. Select this condition for both, but set one to be inverted. For target actions, set the non-inverted ACB to increase the fuel generator's battery fraction to 1, and set the inverted ACB to reduce it to 0.

This will run something like this:

if battery level is below x then:
set fuel engine battery fraction to x

if battery level is above x then:
set fuel engine battery fraction to x

Alternatively, there's a simpler method: set the engine to operate at 100% battery fraction continuously, but assign it a lower priority in the Vehicle power menu (V).

[Knux Redbeard]

So the advantage of breadboards is density. The advantage of ACBs is redundancy. Put both ACB's right next to the engine block, set the range really low, and now the control scheme for the engine is located *on* the engine, so if the ACBs get destroyed, the thing they control also most likely gets destroyed. But that's two ACBs per engine block. With breadboards? That's a single block that can control and manage power generation throughout the entire craft.

A good method for redundancy is to have it so that engines only get fired up as needed by setting the cutoff/startup points for each engine to be different, and having more engines than you need even under max load.

[Estrateking]

Originally posted by Knux Redbeard:

So the advantage of breadboards is density. The advantage of ACBs is redundancy. Put both ACB's right next to the engine block, set the range really low, and now the control scheme for the engine is located *on* the engine, so if the ACBs get destroyed, the thing they control also most likely gets destroyed. But that's two ACBs per engine block. With breadboards? That's a single block that can control and manage power generation throughout the entire craft.

A good method for redundancy is to have it so that engines only get fired up as needed by setting the cutoff/startup points for each engine to be different, and having more engines than you need even under max load.

There are no rules that you can't have many bread boards, each only controlling a local system.