Recent content by DuncanHall

I am upgrading my electrical systems on my vessel to accommodate Lithium batteries and need a larger board to mount the elecrical inverting and charging systems. Currently my Inverter charger alternator to battery charger and MPPT sit on a sivler covered board that sits in the enging...

Thanks all I will go with the 30A Orion. It means that my Stirling Battery to Battery Charger is now redundant. On reflection running the engine to recharge is poor compared to running the honda Generator which feeds the multiplus delivering 70A. I have a 60A alternator at present and it may...

One final post. The time taken to do this thread has had an unexpected benefit. My final solution is to use 3 Foxstar drift 105AH units. Plus a stirling 1260 Battery to battery charger to prevent damaging the alternator, an upgraded 100A Alternator plus appropriate fusing. The choice of 3...

Progress I have a cost of Winston cells from Julia Yu. I took a quote for 8 300AH Winsrton cells and the cost delivered including all tax and duty is $2925. Just asuming the price scales lineraly then the equivalent 300AH wort of cells comes to about £1200 with no BMS. The 3 Heated Fogstar...

I have made a further discovery. in #45 is repeated the asertion that the Victron 200AH battery used Winston cells. Looking at the dimensions of the Winston cells this cannot be so as using Winstone cells would lead to a larger enclosure. Infact the energy density of the victron product is...

You are correct that the victron needs additional components external to the battery. However this link shows that internally it looks very similar to a 123 BMS with some of the cell balancing internal. My original thought was to use the Victron Smart BMS 12/200 as this acts as a current...

The Class T fuse requirement is a useful addition. Having read a bit more it seems sensible to change the existing 250A Megafuse in my system for a T Type. I did look at using Winston cells end an external BMS but the cost was comparable to buying the victron 200AH unit which appears to be...

Thanks all for the advice. I recognise that its some days since posting but I read the long self build thread! My professional background was in nuclear safety so I thought I would add some of the requirements of diversity and redundancy into my decision making. Several of the requirements...

Looking at other options I found Fogstar. It seems to have good customer feedback https://uk.trustpilot.com/review/fogstar.co.uk and has been trading dor arround 5 years. I may take a punt onto one of their 280 units coats £900 . They dont have the benefit of an external BMS but if the...

Yes its net of charge inputs. Batteries are usually fully charged as I plug into mains at my home marina. Consequently they are fully charged once the boat has had 24 hrs in dock. The solar can bring them up to charge. In 2021 I was stranded on the river turo for 40 days and when I left the...

This may help its a log of consumed AH over the summer. Thats what makes me think 200AH may be enough but 300 better. I would add I have a honda generator which is ocasionally used to top the batteries up.

My victron system is interfaced to a Raspbery Pi running venus and connected with a BMV the multiplus and a Victron MPPT 75/15. So setting charge voltages is not difficult infact I can do it from home!

After going through a set of AGM batteries in just over 2 1/2 years, I believe the time has come to change over to lithium. My existing system has about 480AH of capacity but I found this is down to a small fraction of that now following my system giving low voltage alarms after discharging...

Allan of this forum https://forums.ybw.com/index.php?members/allan.6793/ was one of the two blokes that recorded the trip on the Cardiff Yacht club website. I recall I lent him a spare mainsail. He is still active on the site. He was always very helpful as all the sailors at Cardiff were...

Yes I mean the small slip next to the jetty. I and others have used it many times. The problem with the slip is the lack of shelter. Its well out of the way of the steamer. There is a small breakwater to separate it from the jetty.