^So does a new Trik L Start. It’s a mini DCDC charger.
It’s another way to skin the cat but it’s a poor way except maybe in the case of long term storage with solar maintainer already wired into the house setup.
Makes no sense to continuously draw from and cycle the house batteries, shortening their life, to charge the start battery.
Nvm the loss of efficiency with DCDC charging.
AND like usual folks aren’t answering the OPs question. He wants to charge start batt while on shore power WITH the perfectly good converter he already has. And he’s on the right track.
One could make a case diffenrt batteries different charging needs and batteries fighting each other figuratively. However on shore power with a high powered smart charger (converter) it’s going to keep the house at full SOC easily and any equalization between the 2 systems will happen pretty quick after combining them.
If not doing the above just plug in a 120v battery maintainer and keep ‘em separate.
Don’t complicate things.
