Alternatives to battery box for venting???

Re: Alternatives to battery box for venting???

For motorcycles and some aircraft batteries--They do have a single vent for a plastic tube.

Should work OK, but seems a bit of a pain when you have to check electrolyte level (tubes and caps getting in the way ~once per month).

Catalytic battery caps do work--Basically, that is also what is used in AGM type batteries.

The Catalyst does have a life--Basically some number of AH's of charging (and converting Hydrogen + Oxygen back into water).

http://www.hydrocapcorp.com/picts/installing.jpg

The life expectancy of a Hydrocap Vent is more than 5 years with overcharge rtes below 3 amperes for 2 hours each day. Other rates can be calculated from the minimum expected life of 10,000 Ampere-Hours of over charge current.

So--If you have a tendency to pump a lot of current into your battery bank (during final charging/equalization) with the cells gassing quite a bit--You can overheat and destroy the caps (the recombination back to water is generating heat).

Hydrocaps are not cheap these days (one vendor on the web is quoting $18 each--don't know if this is high or low price). Back 25 years ago, they were probably less than $6 each. They contain platinum--And we know what is happening to the price of noble metals.

NAWS used to carry them, but, if I recall correctly, they were having problems having their orders filled on a timely basis.

http://webcache.googleusercontent.com/search?q=cache:4isNhxzqlEoJ:www.solar-electric.com/batteries-meters-accessories/batteries/baacma.html+&cd=4&hl=en&ct=clnk&gl=us&client=firefox-a

We no longer stock Hydrocaps due to lead times of several months

You might try Water Miser Battery Caps ... They are cheaper and don't "wear out". Some folks here have purchased the taller version of the caps--They have a more surface area internally to capture electrolyte mist and save a bit more water (I have an on-grid system--Just information from what I have read here).

http://www.flowsystemsusa.com/water-miser-vent-cap.html

If you are thinking of going with Hydrocaps--You may want to look at good quality AGM batteries... Overall, similar life to hydrocaps and a nicer (and more expensive) lead acid battery.

If you are going for cost and long life, a good quality flooded cell battery + Water Miser caps (if you wish) may be more cost effective.

And if this is your first off grid power system... Trying a less expensive set of batteries for your first or second bank is probably a better use of money too... Most of us have killed our first set of storage batteries (over charging, under watering, under charging, over discharging, etc.).

-Bill

Re: Alternatives to battery box for venting???

You may be right about the palladium... I could not find the catalyst on their website.

-Bill