Will a Battery Monitor properly show Solar, Wind, or Hydro Output?

Many boats these days have a battery or systems monitor permanently installed. Popular models include: E-Meter, Link 10, Victron BMV, Philippi BCM, etc.

With these meters, DC current is measured in and out of the battery by a device called a Shunt that is installed in the negative lead to the battery. A Shunt is simply a bar of metal with a known resistance between the two ends.

The resulting drop in current is then measured by the monitor and multiplied to give the correct current reading. The Shunt is the very last item connected to the battery negative post, and no other negative leads must be allowed to by-pass it. This is to ensure that it measures every amp of current going both in and out of the battery.

As you can see from the example below, it is possible for solar panels or a wind/hydro generator to supply power for DC loads directly, via bus bars or other connection points, without their current flowing into the battery or through the battery monitor Shunt. 

Read more: Will a Battery Monitor properly show Solar, Wind, or Hydro Output?

Marine Cooling, Refrigeration, Monitoring, And Solar Solutions


Are you a boat owner, or soon-to-be boat owner, with questions about your vessel's systems? Let us help you find those answers. For example:

    • Want to know how many amp/hours your solar panel is putting into your battery bank? Philippi's PSM System Monitor can help you there.
    • Water-cooled vs air-cooled refrigeration, see "Which Condensing unit should I use" in Refrigeration > Planning.
    • Where does one begin when planning for solar panels on a boat? With "Marine Solar Panels Planning and Installation Guide in Solar > Planning.
    • Can you have air-conditioning on your boat without running a generator, or the engine, or being plugged into shore power? (Hint: Yes!)

If you don't see the answer to your questions in our website, blog, facebook, or twitter posts, then contact us directly. We are here for you.


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Oh, the humidity!

humidity meter

When the seasons change from Spring to Summer, there is always a certain amount of reluctance to fire up the air conditioning in our house until it's absolutely necessary. After being closed up for the Winter, having fresh air blowing through is so refreshing there is no rush to seal off the outside world again until things get too uncomfortable.

The comfort issue is more a matter of excessive humidity rather than temperature, and when it gets to the point that you can feel

Read more: Oh, the humidity!

Featured Products - Expires July 28, 2015

Frigoboat Marine Refrigeration Vitrifigo America coastal cool-aids philippi marine

solara marine solar panels solbian  

CLIMMA MARINE AIR CONDITIONING Micro Air Inc MSI Marine Systems 


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