Numax CVX 30 HMF
113AH and 1000 cca
I believe this to be the most powerful standard fit replacement!
From what I have read on the internet, Marine CCA and Automotive CCA are different.
1000 CCA on a marine battery equates to a much lower figure when compared to Automotive CCA which could be say 850 CCA. ( estimate for comparison purposes, as it depends on the construction and material of the battery)
The reason being that Automotive CCA is calculated at -18 C and Marine CCA is calculated at 0C. FROM what I have read...:nenau and there are a few dodgy sites out there..:augie
There may also be an issue with the amp hour rating when comparing, as they should be tested at a 20 hour rate, I am unsure at what rate the Marine batteries are tested at, but if it is over a longer period than 20 hours, then the current will be lower and the Ahr rate would be greater.
Would I consider this battery as a replacement for my 17 year old Maverick...:nenau
YES, TOO RIGHT I WOULD:thumb2:thumb2
Here's why...
There is a small drain on the Mav when sitting idle, and since I often use it for short journeys, then during the week the battery is slowly loosing the charge, so a starter battery is really unsuitable which can really only take a 10% discharge without doing serious damage to the life of the battery. I often do a float charge during the week, or for longer periods, and I use one of those 3 stage chargers.
A deeper discharge battery would be better for my application, and Marine batteries can take up to 50 % discharge without serious damage. They have fewer internal plates and larger spacing, than starter or automotive batteries.
However a full traction type battery will take an even deeper discharge, up to 80% discharge without serious damage. These would be better for cyclic use like trawling motors on boats, ie electric outboards.
So what do I know about this?:nenau
I own a boat and batteries come up all the time, they are often abused, left for long periods of time in a semi discharge state.
They often supply electric fridges, so are discharged regularly to 50%.
I hope my experience on this matter helps, backed up by some "information" found on the internet...:augie:augie
So do a google, have a look and see if you can confirm or contradict my findings please.
To estimate the charge condition of a battery, you have to measure the terminal voltage at no load, and having sat for some time, ie not just after a run.
I have seen several tables to show this, BUT it also depends on the ambient temperature, and not all tables show this, but basically if your resting battery voltage is showing 12.0 volts, it is in a discharged condition, and is sulphating up as you watch it.
If at 12.5 volts it is about 50% discharged, and automotive ie starter batteries are also becoming damaged and if over 12.8 volts then you are close to full charge.
See if you can find a suitable table based on ambient temperature, make a note, then buy a cheap multi meter and keep an eye on your battery.
Don't let a flat battery spoil your winter fun.:clap:clap:clap
Best regards,
Rustic
