Thursday, February 11, 2010

Power upgrade

Trevor at Adverc recommended a larger alternator and some Absorbed Glass Mat (AGM) batteries. This type have a longer cycle life and are low maintenance. I am told that the new spec with 600 Amp Hours of battery capacity and a 110 Amp alternator should meet our needs. Only time will tell as the proof is in the pudding. My old batteries were showing their age after 3 ½ years having lost much of their capacity. One of the reasons given for the 70 Amp alternators failing was that it did not have enough output for the loads put apon it.
AGM battery bank
Adverc delivered the goodies to Great Haven Marine Services and John installed it all. We were so lucky to be able to get in and out of the marina in between periods of ice and snow. Got to a mooring by 4 pm travelling through a blizzard! The batteries were full by then and we did not need to run the engine that evening as was previously usual. The next day after 18 hours of use the batteries were still reading 12.3 Volts after supplying 67 Amp Hours of power.

4 comments:

dundustin said...

Hi Chas
I posted this link http://www.fit-pc.co.uk/ to Bruce on Sanity. PC which uses just 11 watts power and small footprint.
Love the new batteries. Just a question.. how long would they run fully charged if i was running a pc, tv and couple lights , could i also boil a kettle a few time sin the evening?

Chas and Ann said...

I am using about 80 amp hours a day so should last between 2 and 3 days. Depends how many batteries you have. Each one can deliver up to 20 amps. I would not recommend any electrical heating device on batteries without the engine running.
Chas

Carol said...

Hi Ann, Chas - great to hear that you have now solved your battery/alternator problem. Happy cruising - Carol and George

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