Kayteg1 wrote:
theoldwizard1 wrote:
A DC to DC charger is the only way to fully recharge a RV house battery bank. And they do not need extra heavy duty wire !
RV exist at least for 50 years and they never had B2B chargers, even when old insulators would cut 0.4V right on them.
Nobody in those 50+ years made an issue about not charged batteries.
Fully charged battery is 13.5V, when typical alternator runs 14.5V.
So even when you loose 0.5V on wires, you still will have fully charged battery.
Obviously smaller wire will limit current, so required time will be longer.
Just like AGM batteries are oversold, so are B2B chargers, who are not needed for led-acid batteries.
Yes and 50 years ago you had a propane light, no electronic controls, hand water pump, pilot on the water and fridge, no electric slide outs, wall propane heater with no fan, no propane detector. Standard car start battery would last a long time. Extended off-grid was done with a tent. A 80% charged battery after a drive did just fine.
Battery power demand today has changed. Getting a full charge is more important than ever.
