Forum Discussion

BFL13's avatar
BFL13
Explorer II
Jan 15, 2018

Alternator to House Battery Charging Test Results UPDATE

Update 18 Jan-- This is for my rig with its particular wiring (some changes to original done by me). Has the dreaded Ford 2G alternator. Testing on a pair of 6s starting at about 55% SOC and 12....
Gjac's avatar
Gjac
Explorer III
Jan 17, 2018
BFL13 wrote:
A "700 watt charger" probably has PF of 0.7, so that is 1000 VA for the inverter to supply.

If the charger is set to 14.8v DC and is 85% efficient (typical) output watts is 595 and at 14.8v, amps would be 40.2.
Ok so I should have divided by DC volts not AC volts. So that means with my MSW 1000 watt inverter I should be able to charge my house batteries with my 40 amp B&D charger while in route to the next campsite right?

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,273 PostsLatest Activity: Jun 22, 2025