Steve’s Yacht Repair uses Magnum Energy inverters, a leading manufacturer of premium inverter/chargers for marine

Magnum Energy inverter chargers are designed with marine use in mind. The easy to use remote combined with the ME-BMK. Makes monitoring your battery bank easy. The SW2012 true sine wave inverter charger is a great way to go for most boaters.

Magnum sign wave 2012, with 2000 watts of continuous power it is capable of running most microwaves. The clean sine wave is safe for computers, stereos, plasma screens, and other sensitive devices. If you use laptop navigation good clean AC is a must. I have used small inexpensive inverters for navigation and have my computer crash at the most inappropriate time. Or charge my cellular phone only to find the batteries are wrecked  after a week or so of charging on a cheap inverter.

Magnum makes a wide variety of inverter/ chargers to fit every need from the cost effective MMS to MS-PAE at 4400 watts (48volt DC) units. Made right in Everett Washington. I never have a problem with these inverters they just don’t fail. I have gotten great support from the guys at Magnum Energy and that is why I sell there product.

Magnum Energy offers Generator auto start function ME-AGS-S, No battery monitoring required. Also works with your A/C system to monitor the inside room temperature. Walk away from your boat knowing when you return. The boat will be cool and have a full bank batteries.

Some things to know about inverter / chargers. Inverters require a large amount of DC power having an adequate battery bank is a must. On most sailboats having 400 to 700 amp hours is about right. Power boats have more room and a little bigger bank is good. I don’t like to go over board with battery banks. Batteries are really heavy and take up a lot of room. I have people say to me all the time.  “I want to be able to stay on the hook for three or four days without having to charge my batteries.” A more practical approach is a twenty four hour cycle. When you get up in the morning you should have enough battery power to get your day going, make some coffee get everybody up. If you have a generator it would be a good time to run it. This is where the charger part of the Inverter/charger really kicks in. Step charging raises the charge voltage allowing for a faster charge or Bulk Charging, stepping down to Absorb charging, and then to Float. Once the inverter/charger is in float mode shut the generator off and keep an eye on your voltage. Once the batteries reach around 12v its time for another charge cycle. Probably in the afternoon some time is about right.

Sailboats or boats without generators are little different. I recommend having a good Balmar alternator and ARS-5 regulator  for fast battery charging. you may need to run the engine to charge your batteries while on the hook . Solar panels really help in keeping the battery banks full.

Conservation is the best way to achieve battery independence. LED lighting has come a long way in this department and replacing out your light bulbs with led really works. Keeping loads down during the day is important.

Some things you can’t run off your inverter, the hot water tank or electric heat. Both these things will flatten your battery bank in no time and wreck your batteries in the process. Battery chargers; I find these on the AC panel looped in all the time. Inverting DC to make AC to make DC to charge the batteries?

Location of the Inverter is important. ABYC states, not over the battery bank. The hydrogen sulfide gas can get inside the inverter and damage it. Keep the cable leads as  short as possible. 2/0 cable is expensive. If you go to a 3000 watt inverter you will need to go to 4/0 cable. If your inverter is any distance from the batter bank you will need to jump up to the next size of cable.

The inverter requires a high AMP fuse located close to the battery and a switch. If you plan on installing an AMP counter all loads to the battery negative will need to go through the shunt. A large bus bar located next to the shunt works really well. If you plan on tapping into the existing AC power panel isolating your loads takes some skill and isolating the inverted neutrals is a must. If you don’t do this you can back feed the AC system and create a shock hazard.

Let me know what I can do for you.

Steve