No Power at Panel

[Cosmo725]

I have a 2001 B34 and installed a new House (200amp AGM) and Starter battery (100amp AGM) two years ago.  Boat was launched last week and I have no pawer at the panel. Battery Charger says the batteries are ready to go and I tested them with a voltage/amp meter and they are charged up.

When I turn on the battery switch under the Nav Table the low voltage light comes on for a few seconds and fades away.  I searched the forum but did not see any posts related to this issue, has anyone had a similar issue?

[Samoerai]

You'd better measure the volts while the main switch under the nav table is on.

I the voltage at the battery is still above 12.5V measure the voltage on the main bus bars which are probably located behind the main panel. The negative is a strip with cables next to each other. The positive a sort of pilar with cable lugs on top of each other.

If you measure no voltage there you probably have to look at your main fuse, located near your batteries.

If you measure the same voltage as at your battery, you have to follow the cable bundle to your panel and measure some points at the panel. You only have to put your positive lead at the panel, you can leave your negative lead on the main negative busbar

If you measure a (much) lower voltage at the busbar than on your batteries, you could have a bad (loose) connection on your batteries, or a bad cable, or corrosion.