"My ElCon PFC 2000+ charger delivers an honest 28A @ 54V, more than 1500W into the batteries at full power. It is also efficient enough that my portable Yamaha EF2000iS (rated 1600W continuous) can power the charger under full draw (barely). I've driven my boat for 1 hour at 4.3kts on the generator/charger alone as a proof of concept. However I've never needed to use that system "in anger". One thing that I like is that the PFC2000+ has an onboard fan to keep the charger cool and while doing a full charge in less than 5 hours on shore power, the charger never gets more than warm to the touch.
So it works like this, once the batteries have some room in them for a charge, the charger can be plugged into the running generator. As stated before, my charger does a soft start, ramping up to producing 28A at 54V. If motoring and the drive system is pulling right around 28A (around 4.3kts for me), then very little energy is going into, or out of, the battery bank. If I slow down to 3kts, then 10A is going to the motor and the remaining 18A is recharging the battery. If I speed up to 5kts (48A), then 28A comes from the charger and the remaining 20A comes from the battery bank. My battery bank can support a 20A (1000W) draw for more than 6 hours or 30nm, before I would have to reduce speed. While I have verified the numbers for all three settings for a few minutes, I do not know if there would be any issues (charger or generator) that would arise in running this way for extended periods like 8+ hours.
That said, I've never needed to hybrid-motor when underway, except for the one proof of concept exercise. The generator needs to be on deck while running, but it just fits in my lazarette when not in use (the Honda version is 1" thicker and would not fit through the hatch). I have run the generator while on a mooring at Catalina, just to top off the traction bank, but I didn't come close to actually needing to, I didn't use much battery power on the trip back either."
So while I did engineer this emergency solution, just in case, the scenario where I would need to do this has not come up in the 10 years since I converted my boat.
Fair winds,
Eric
1964 Cheoy Lee Bermuda 30, 5.5kW drive, 8kWh LiFePO4 battery bank
Marina del Rey, CA
So while I did engineer this emergency solution, just in case, the scenario where I would need to do this has not come up in the 10 years since I converted my boat.
Fair winds,
Eric
1964 Cheoy Lee Bermuda 30, 5.5kW drive, 8kWh LiFePO4 battery bank
Marina del Rey, CA
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