Hi Anne,
You can Google either brand for prices and locations.
The converter outputs are isolated from the inputs, so the power converters can be linked in series, each tending a 12v battery(s).
The converters are designed for continuous output, and require free air for cooling.
A local electrician should install, or at least inspect, the AC power. Grounds are chassis mounted on the converters, and should not be tied with the boat ground (bonding) or DC negative. Bonding, grounds, and galvanic isolation are another discussion entirely, and also an excellent Google search topic.
Our moderator has had many years of experience using an old school Lester golf cart charger. These are available in 48v output, but I don't think you will be able to get quite the amps in continuous operation available with the power converters. $8v telecom power supplies are what I have in my laboratory. They can be found in electronics recycling stores for reasonable prices. My 10kw unit was $275.
Be Well,
Arby
From: amracel <amracel@stuffandjunk.net>
To: electricboats@yahoogroups.com
Sent: Monday, June 18, 2012 12:50 PM
Subject: [Electric Boats] Re: Backups
Thanks, Arby. Sounds like something worth pursuing. Can you point me to a link with more information?
Anne
--- In electricboats@yahoogroups.com, Arby Bernt <arbybernt@...> wrote:
>
> Iota makes a 120vac to 24vdc at 35amps continuous. Marine listed, use two and go slow. 35amps should move you to safety.
> WFCO power converters come in several sizes. One of my customers uses a 3500w propane genny and two 55amp convertors to back up his 4x L16 24v string. Although conformal coated, the WFCO converters are not marine listed. FYI
>
> Be Well,
> Arby
Anne
--- In electricboats@yahoogroups.com, Arby Bernt <arbybernt@...> wrote:
>
> Iota makes a 120vac to 24vdc at 35amps continuous. Marine listed, use two and go slow. 35amps should move you to safety.
> WFCO power converters come in several sizes. One of my customers uses a 3500w propane genny and two 55amp convertors to back up his 4x L16 24v string. Although conformal coated, the WFCO converters are not marine listed. FYI
>
> Be Well,
> Arby
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