Am assuming you cannot endorse a particular solar battery manufacturer. However, am interested if you are aware of ratings or reviews that have taken place in relation to solar batteries.
In several of your articles it appears you have been quite affirmative of using L16 batteries. I have noted a battery manufacture “U.S. Battery” L16HCXC with diamond plate technology. This battery however has only a one year replacement battery. Then there is the Rolls Surrette L16 that comes in two models with First 24 months replacement, next 60 months prorated. Another is Trojan L16 coming in a couple models with 24 months replacement and next 60 months prorated as well. There appear to be a few other brands as well (i.e. Deka, Magnum, East Penn, Interstate).
Great to hear from you on what perceptions may be on the above batteries or if there are others coming out with new technology that need to be given a serious look.
You are correct that I think the L-16 battery is perfect for most residential solar power systems, and I do avoid indicating brands. However, I will give you some of my own feelings about battery brands.
The main reason I use Deca batteries for most of my smaller projects is there is a regional Deca factory distributor about 15 miles from our offices that always keeps a good inventory of fresh batteries and we do not have to pay for shipping. The East Penn you also mentioned is actually the same as Daca as they are a combined company.
I believe the original “L-16″ size designation was a Trojan model number, and I think they build a really great battery. But I have also heard from other solar installers that Trojan batteries are getting very pricey, and Trojan now makes their “L-16″ battery size in about 4 different amp-hour sizes, so you can no longer compare their battery just by the generic model number.
I have used the Surette / Rolls batteries which have a really long warranty period and are very well made. Some of this added life comes from the chemistry of the lead they use, but this also makes it harder to achieve an equalize charge unless you are still on the grid, so I like them better for grid-tie systems than off-grid systems. I have not used the other brands you mentioned, but this does not mean they are not good.
When comparing battery brands be sure to also check the amp-hour ratings as they are all different even for the same L-16 battery size.