Thread: Newbie
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Old 10-15-2020, 04:21 PM   #3
rsn48
Guru
 
City: Qualicum Beach, Vancouver Island
Vessel Name: Capricorn
Vessel Model: Mariner 30 - Sedan Cruiser 1969
Join Date: Feb 2019
Posts: 1,940
I have added solar and an Efoy fuel cell (methanol). See what you have, the real energy burner is your electric stove/oven. I installed a Force 10 2 burner stove/oven using propane.

You don't mention your battery bank so I can't comment.

But you want:

1) large battery bank with batteries that hold more energy than the standard flooded lead acid batteries. Consider AGM/Fire Fly/Lithium batteries, each one more expensive than the last, but each holds more energy and can be discharged to a deeper rate and charged faster.

2) You don't say how long on the hook.

3) You may want to upsize your alternator or add a second one.

4) Solar with give you roughly 20 amps per 100 watts in the summer. Obviously you aren't going out in the winter but they can keep your batteries topped up in the winter. Add as many panels as you can.

5) I have developed a system for myself where I will be using roughly 150 amps per day. Between my alternator, solar and fuel cell powering one smaller fridge, one smaller freezer (both with one inch foam around them), and 30 minutes of 1200 watts of "stuff." So for example, I can make toast (four slices, 2 slots at 940 watts), one 5 minute session with my wife using the hair blower on medium, 5 minutes of a 700 watt microwave use/day (remember it takes power to make power, a 700 watt microwave probably is around a 1000 watt unit), and watching a much lower wattage small LED TV for about an hour and a half (movie), and charging tablet, phones, etc.

Remember: Lithium is a "system," you don't just add lithium batteries or bad things could happen particularly to your alternator.

When I bought for my boat (not that large), I bought the cheapest of appliances as these cheapies have the lowest wattage, so low watt toaster, microwave, tv, convection oven, one burner induction burner. The convection oven and induction burner are for when hooked up to shore power, I get to save propane not using the BBQ and propane burners/oven.
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