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Inconsistent Alternator Charging, on May 02, 2017 asked:

We are very pleased with the Firefly Oasis AGM battery you installed for us. We can actually relax about our power consumption now. We should have made the changes much sooner! Regarding charging the AGM battery, is it harmful for the battery to be charged to inconsistent levels by the alternator? When on the boat for several days, the battery does not always get fully recharged each day. Is it better, when possible, to minimize alternator charging and maximize charging with the smart charger when connected to shore power? - Sean

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What Are Examples of a Good High Ouput Alternator?, on Jul 05, 2016 asked:

I read your Tech Talk article "Small Boat Electrical” and see in the costs chart you have $300.00 for a high output alternator. Could you give some examples of these types/brands/output and would they include a smart charger built in? Thanks for the great informative article. –Terry

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Does My Inverter Draw More Than What My Alternator Creates? - Doug, on Oct 16, 2015 asked:

My SOC was 51% and my meter said inverting -7 amps. I started the engine at 1200 rpm and my meter says inverting 66 amps. Am I correct in assuming that I am putting 60 amps per hour into my batteries? So after a couple of hours I will have another 120 amps in the batteries and should be good for the night?

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Bypassing an Alternator’s Internal Regulator – Erick, on Oct 01, 2015 asked:

I had a Delco Remy alternator in the boat when purchased it. It was hooked-up to a Balmar 612 external regulator. When it quit, I replaced it with same model Delco Remy and fried it in no time. I have been told by Balmar the problem is that the new Delco Remy had its own interior regulator and will not work with the existing set up. I have disconnected the Balmar 612 from the system and replaced it with the same Delco Remy. My question is it worked before (for several years) so how do you bypass the interior regulator?

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High Output Alternator Recommendation – Jean, on Nov 30, 2014 asked:

Can you recommend an alternator manufacturer? I would like to install a 150A unit. Do I have to change my wiring between this new alternator and my house bank? I imagine I will have to change the fuse also.

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Don – Overcharging the Start Battery, on Sep 28, 2014 asked:

On a sail boat with both a start battery and house battery that is charged by the engine alternator, why do you not overcharge the start battery if the house battery is discharged and the alternator is putting out high charging due to the low house battery?

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Brent – Windlass, No Payout, on May 27, 2014 asked:

My windlass will pick up the anchor but will not payout the anchor. There is a switch to reverse the mode but I think it is a mechanical issue. I took the windlass off the boat. I measured at the wiring connection to where the windlass had been, +12.6V when the windlass toggle switch is up and –12.6V when the windlass toggle switch is down. The electrical problem is internal to the windlass unit itself. Is there a company in the Lower Mainland that you recommend that would be able to take the windlass apart and rebuild it?

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Gordon – ProlsoCharge Alternator, on Mar 30, 2014 asked:

You may recall that you helped me identify that having fitted a Pro Mariner ProlsoCharge in my three bank battery system, I could no longer charge all banks from the inverter charger. I have come upon another issue which I need help with. On occasion, when I start the main engine I get a flashing green light from the ProlsoCharge indicating low alternator output <13.3V, but a blue steady light on the Engine battery 1 charging, with no reading on the engine alternator DC Amp gauge in the wheelhouse. Engine battery voltage on the engine panel is around 11.3V. After several minutes in this state everything returns to normal. All banks are charging, the green light is steady and the engine ammeter starts reading. The time varies: it can be not at all, or up to 10 minutes approximately, based on the engine alternator DC Amp. Is this a normal function or do I have an intermittent alternator problem? My alternator is not externally regulated. I only one engine and it is matched correctly. There is a shunt between the alternator and the ProlsoCharge unit.

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Peter – Charging Program, on Mar 15, 2014 asked:

I just bought a new sailboat with flooded batteries and Balmar charger. The program for these batteries starts at 14.6 volts, which is above the 14.4 that you mentioned in the PY article. The engine battery is up to 14.8 volts when charging off the engine, as the batteries are isolated. Should I change to a different program to avoid this? The boat is new to me and I believe that there is a temperature probe. I am not sure if the probe is on the house batteries or the engine starting battery, which is the one being overcharged when we have been at anchor and the house batteries are depleted to 12.2 volts or so. The engine battery is still at 13.2 volts, so I assume that the Balmar might be overcharging the engine battery as it is producing full voltage for the house batteries.

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Don – Overcharging Batteries, on Feb 21, 2014 asked:

On a sailboat with both a start battery and house battery that is charged by the engine alternator, why do you not overcharge the start battery if the house battery is discharged and the alternator is putting out high charging due to the low house battery?

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