CarpeDiem

Thanks IT, I was curious if you had an opinion? If we take MHT as the single source of truth, ArgoFET isolator splitters aren't the be all and end all for load dump protection. Quote "and yes we have seen FET isolators fail". Blowing up an ArgoFET isolator vs blowing up alternator diodes appears to be a similar proposition If you wanted to be more risk adverse then going for a diode to your start battery could provide that, at the expense of voltage drop. Personally I think I would risk it.

You set up your alternator/regulator pair for the Li and use the dc/dc to top up your start. So you can take your start battery to 14.7 while your Li is charging at 13.2... Or if your Li has topped out at 13.8 then your dc/dc will continue at 14.7. All numbers are made up and will depend on your setup but are realistic. Now you have 2 chargers. Your alternator, that is smart because of your mc612, and the dc/dc charger. The voltage from the alternator while charging your Li should be too low to charge a agm start fully.

Also, Victron ArgoFET is the best splitter I have come across: https://www.victronenergy.com/battery-isolators-and-combiners/argo-fet-battery-isolators But in hindsight and thinking about it right now, I am not actually sure how these would cope with an alternator load dump/voltage spike which is your use case - maybe that is something @Island Time could comment on?!? Maybe a traditional diode splitter would be better just cranking up the voltage at the alternator to compensate for the voltage drop.

I got mine a year ago +/- from here: https://www.ivent.co.nz/product/category/951/12v 100ah deep cycle lead carbon battery/38317 I am pretty sure I paid $275 incl.. I note that site now says $275 and I suspect that that is excl GST, so maybe I got that wrong... although prices may have also gone up....

You definitely cannot charge any LA as fast as Li. You may be thinking that you can only charge so fast because of your alternator capacity, therefore it makes no difference - that's not correct either, because LA will push back on the current far far sooner than the Li will. Eg, the Li will continue to accept 100amps up to 95% capacity. While the LA will probably be down to 15amps at 95% capacity so your charge time is considerably longer to reach the same capacity. If you have a 100ah alternator and a 100ah LFP battery, you can pretty much gaurantee that after 1hour the battery w

Yes. Exactly that battery. Cost $275. The best value deep cycle around IMO. There's so many different ways to build a solution. You need to build based on the outcome you want to achieve. You'll only get as much current as the battery will accept. If it's fully charged it will be f.all and certainly not 12amps.

Use a splitter to charge the lithium and have it connected to the start as well. And use a cheap dc/dc from the Li to top off your start battery. You've already got the mc612, it's not what I would recommend for a greenfields installation but it's an investment you can leverage. Obs you need to set the right specs. Connect your current solar controller to your new Li and set it up for whatever Li charge specs you are happy with.

Lithiums don't need dc/dc. But that is one of many options. I would recommend against dc/dc for lithium. One of the main benefits of lithium is the fast charge rate and you lose that with dc/dc. You raise valid issues but there's other ways to skin the cat... The MC612 can't measure current. It limits the output and that's it. I run my stock alternator at max output for a couple of hours and have never had any problems. The reality is you cannot charge two different chemistries (incl lead carbon) with one charging source. Their will always be a compromise.

I have one of these for the anchor winch and a backup start battery. The equalization applies if you are using it as a standby battery. It would sit on float for 6 months and then undertake a equalization charge. You're using it as a cycle battery. They don't provide a termination current but it's safe to assume 1amp. Charge to 14.7 volts at a max current of 20a when the current drops to 1amp switch to a float charge of 13.8v I don't float charge mine, I just switch off and let the battery sit. It's usually 12.9v after 2 weeks in winter. During summer it's generally

The reports coming out of Northland indicate that the finding at Omakiwi Cove is probably ground zero for New Zealand's Caulerpa infestation. It was called out previsouly in this thread that Caulerpa was very possibly transferred to Great Barrier from a yet to be determined location in NZ. Looks like the authorities may have found that location... This now starts to give more credence to the Aquarium theory, introduced into the storm water by a BOI resident. The finding certainly doesn't rule out the more likely anchor theory. Particularly that BOI is the obvious first stop

I find the story of this ship fascinating. An ocean liner passenger ship sunk by the Germans just off the Hen and Chickens... like wtf!? This is a great book on the story, including the recovery of the secret cargo. https://www.seatech.co.nz/products/deep-water-gold-by-keith-gordon Deep Water Gold is the complete story of RMS Niagara, a famous Pacific liner sunk in 1940 with eight tonnes of gold bullion off the Northland Coast of New Zealand by the German raider Orion. If you're ever visiting the restaurant at Tutukaka Marina there's a big photo on the wall of the dive b

I am using Chrome on Windows 10. Same results with Firefox and Edge. Also same results on my Android Tablet and Phone with Chrome. It's a permissions issue - not a browser compatibility problem.

I don't see those options. After selecting Crusing it then takes me to the upload page with no options to create a album. Also, I can only choose the Cruising entry, Racing and Non-Sailing are ghosted for me and cannot be selected.

Thank you. Really good to know and understand that. I was definitely not aware that the MRXs were in survey. Infact I had been told completely the opposite when I enquired several years ago.

Now that it's up there in those shallow bays the tides and currents are going to spread it everywhere. Boat anchors are going to play a very minimal roles.

A few years ago mnz ran a campaign which contradicts that. They might have changed their position, but the campaign went something like "if a friend gives you money for boat petrol then that's OK, if he gives you money to borrow the boat then that isn't". As you said it is MNZs opinion, on the law. Until the law is tested in court and case law is established the definition of what the law means isn't defined. Your club can't test it in court, only MaritimeNZ can test it in court and only by bringing a prosecution against the club officers - that's the risk. Consider also the comple

That's a bit different from what we are discussing here, isn't it? That's paying someone to operate a boat which they or the club, or someone else owns. Presumably the operator is making a profit? If your skippers are volunteers, they are club members and they are receiving a "nominal wear and tear gear allowance" eg, $25/day and a beer and a meal afterwards at the bar, then that would need to be tested in court to determine if that was payment for service, in my non maritime club experience in relation to, Worksafe, DOC Concessions and the Adventure Tourisim Regulations, the courts hav

I thought patrol craft had exemptions? Like the start boat, which is clearly funded by paying race entries, and the boat they use to tow the Elliott's around, which is clearly paid for by the learn-to-sail fee. You're saying no exemptions have ever been granted?

It thasn't been tested in court with a not for profit club There's a lot of grey area. Funds go to the club which can then be disbursed as running/operating costs to the boat and boat owner. Does the boat owner make a profit, can it be shown to be running costs? By extension are contributions from crew to a owner of a race boat subject to the same rules? What about when you go out with a mate on your launch and he pays for the petrol/diesel? Or the crew get together and decide to buy you a new headsail because they flogged your old one? Are the (literally) cans and cans of beer I

The MRXs at Squadron were discussed once. The conclusion provided was because they are a club they don't need to have the MRXs in survey. I felt the position didn't align with common knowledge but I conceded that knowledge comes from MaritimeNZ themselves whom are not the law. The reality is that no one has actually tested the law in court, MaritimeNZ actually need to bring a case against a club that is doing this. And to date they have not. If you ask MaritimeNZ for their opinion then that's what you'll get. It's not a legal position, it's their interpretation, for that you need

If your theory is right, then it should be found all the way down the eastern coast as far as the Chatham rise. PS: Blind, not Bland

Both conversations seem to be taking place simultaneously Once introduced it can move on coastal currents. According to MPI, their theory is, that as it can't survive below 40m and it sinks, it's very unlikely to spread to the rest of the gulf on it's own. I have not read any reason for why they reached that conclusion. I guess we wait and see cause there is nothing else to do

Not according to the this document from POAL. The Cuvier Dump Site ranges in depth from 500m to over 1200m and the seabed is likely to be primarily mud (60- 80%) and sand (20-40%), similar to the material being dumped. Since World War II the site has been used for the disposal of ammunition, decommissioned vessels, and dredged material from Auckland marinas. POAL used the Dump Site for the disposal of dredged material in the 1990s. Information on the ecology of the disposal area is limited because of its isolation and depth.

Pretty sure that dumping ground was only approved at the end of 2022 and it got tied up in court battles. That dumping ground also as far from the barrier as the Ports of Auckland are.

These are the two native NZ species. https://en.wikipedia.org/wiki/Caulerpa_articulata https://en.wikipedia.org/wiki/Caulerpa_brownii It is toxic to NZ fish and therefore has no natural predators in NZ. Assuming the NZ fish were able to adapt to it then they would likely store the toxin on their flesh potentially making the fish toxic. MPI are saying this will not happen. However as we know nature has a way of adapting. Apparently it is not toxic to humans in small doses according to tests done on rats (can't find the reference now). However every publication says "d