Watts Help Needed.

Jim,

I think DB levels are taken at a distance of 7 meters (22.9659 feet). I may be wrong about this.

A larger generator with an eco switch may be more fuel efficient than a smaller one. It may also be quieter.

When the time comes that you have an RV with a microwave the 1800 watt will power it--and the 1000 may not.

your charge WON'T USE 25 amps, it might charge at 25 amps at 14v = 310 watts

25 amps 'use' times 120v would be 3000 watts

amps will 'ALWAYS' taper down

a charger doing 30amps at 14v will still taper to 1amp at 14v when the battery is near full

battery capacity & ability to accept the charge determines the amps at 'ANY' voltage

a partially used battery has a lower internal resistance than a charged battery
as the battery charges, the resistance to accept charge also increases
the battery controls the amount of charge it accepts, not the charger

automatic 'car' battery chargers, turn OFF, when the battery acceptance slows down
they shut off before the battery is fully charged

i know this is a lot to learn,
BUT learning to understand the 'terms' correctly, and correctly charging your battery, will save you money and future problems and expenses

Nice post Mr Wizard.

310 watts / 0.7 power factor gives about 443 watts.