I only find concerns about higher voltage and AC outlets, but my experience with service trucks, camping, boating and RV service has been the need of 12 Volt DC. I know the cars have a 12 volt battery for computer voltage that is charged off the battery bank, and I know Tesla does not recommend using it for jump starting. But trucks need to do that.
Towing a camper or trailer with electric brakes requires 12 V. to charge the trailer battery for trailer brake breakaway switch, and normally traveling with the alternator charging the deep cycle "House" battery gives you a full charge for the night when camping without electric hookup. You disconnect trailer plug to separate vehicle battery from house battery if there is no isolator between them. This runs the propane furnace overnight, supplies 12 volts to the fridge, water pump and lighting. In the morning you start the tow vehicle, and plug in to charge as needed. When longer duration is needed, dual 6 volt deep cycles are used. I assume the trailer connector, usually a Bargman 7 way standard plug will have this battery charge wire?
Many times I'll have a dead battery on a riding mower or tractor that needs a jump, or was cranked dead working on it. I've pulled trolling motors off boats camping somewhere for a weekend, connect with jumper cable to charge off the running truck, just tons of times 12 volts is needed. My boat trailer had an electric winch to pull the boat on the trailer that used the truck battery.... They use a separate plug so the trailer lights can be disconnected when backing into the water. In the RV Service business I had a 7 way connector on the bumper I could plug in to test fire propane furnaces on the tailgate before reinstalling in the camper. You can't service the furnace inside the case. So you need power to it out of the case on the bench. Contractors need to get to off road equipment to jump start diesels when cold, I've needed that for my own backhoe, this equipment sits and needs to be jumped in extreme cold. I forsee a lot of uses for low voltage, high amperage, needs that these batteries are not very good for. Seems a waste of efficiency to use an inverter to plug in a A.C. battery charger and wait for it to charge. What is everyone using to jump start ICE vehicles with their EV? I won't even get into 6 volt vehicles, those starters normally take 12 volt cranking in small doses without issue.
Towing a camper or trailer with electric brakes requires 12 V. to charge the trailer battery for trailer brake breakaway switch, and normally traveling with the alternator charging the deep cycle "House" battery gives you a full charge for the night when camping without electric hookup. You disconnect trailer plug to separate vehicle battery from house battery if there is no isolator between them. This runs the propane furnace overnight, supplies 12 volts to the fridge, water pump and lighting. In the morning you start the tow vehicle, and plug in to charge as needed. When longer duration is needed, dual 6 volt deep cycles are used. I assume the trailer connector, usually a Bargman 7 way standard plug will have this battery charge wire?
Many times I'll have a dead battery on a riding mower or tractor that needs a jump, or was cranked dead working on it. I've pulled trolling motors off boats camping somewhere for a weekend, connect with jumper cable to charge off the running truck, just tons of times 12 volts is needed. My boat trailer had an electric winch to pull the boat on the trailer that used the truck battery.... They use a separate plug so the trailer lights can be disconnected when backing into the water. In the RV Service business I had a 7 way connector on the bumper I could plug in to test fire propane furnaces on the tailgate before reinstalling in the camper. You can't service the furnace inside the case. So you need power to it out of the case on the bench. Contractors need to get to off road equipment to jump start diesels when cold, I've needed that for my own backhoe, this equipment sits and needs to be jumped in extreme cold. I forsee a lot of uses for low voltage, high amperage, needs that these batteries are not very good for. Seems a waste of efficiency to use an inverter to plug in a A.C. battery charger and wait for it to charge. What is everyone using to jump start ICE vehicles with their EV? I won't even get into 6 volt vehicles, those starters normally take 12 volt cranking in small doses without issue.
