US2200 vs T-105

landyacht318 wrote:
The Screwy31 is a USbattery, and it required(s) rather absurd absorption voltages and EQ charges every 14 to 18 cycles for me to get those 500 cycles from it. It is actually up in the high 500 cycle range now, but the cycles are lighter and less frequent, but might still be ~50% of its remaining capacity.

To be a valid comparison i would need to have cycled the life of a trojan group31.

And GC-2s are a much different animal than a group 31 as well.

Faced with the choice the OP has, I'd go for the trojans, but honestly the US Battery did pretty well, as long is it got those extended top charges and frequent equalizations. Getting that SG upto 1.275+ just took a lot of time, when cycled to 65% or below.

This was no different than my Trojan T-1275. However, it should be noted that 6V golf cart batteries are much much less fussy, and come up to full charge a lot easier that a Group 24, 27, 29 or 31 battery, as well as a T-1275. Shape and form and ratio of acid to plates make for much better ease of absorption and top charging in the 6V battery.

AGM batteries are better still, but one day, lithium will be hopefully cost competitive.

The Screwy31 is a USbattery, and it required(s) rather absurd absorption voltages and EQ charges every 14 to 18 cycles for me to get those 500 cycles from it. It is actually up in the high 500 cycle range now, but the cycles are lighter and less frequent, but might still be ~50% of its remaining capacity.

To be a valid comparison i would need to have cycled the life of a trojan group31.

And GC-2s are a much different animal than a group 31 as well.

Faced with the choice the OP has, I'd go for the trojans, but honestly the US Battery did pretty well, as long is it got those extended top charges and frequent equalizations. Getting that SG upto 1.275+ just took a lot of time, when cycled to 65% or below.

Trojan does not manufacture run-of-the-mill batteries.

Here we gots a BMW for $45,000 dollars

And a Yugo for twelve dollars

Which one is the better value?

Heavy boondocking use is a different universe than Power-Post Plug-In-Princess duty. If you are a casual, weekender, there is nothing wrong with an ordinary battery. On the opposite side is an individual whose life suffers greatly if a battery goes belly-up. I'd much rather spend more money for a battery that refuses to fail in a six year period of usage than one that costs half as much that has a 10-year warranty and is almost guaranteed to need two or three replacements. Such decisions are personal and shouldn't be criticized.

Here's something to chew on.

With -genuine- off grid use, the mark of a quality battery should be, "over it's lifespan how hard was it to recover the battery to an equalized state in all cells?". Some batteries should be labelled "----- incorporated". The Trojan, Rolls and a select few other good batteries are easier to equalize and they stay equalized much longer than lesser price-tag oriented specials.

RoyB wrote:


I too would pay the xtra and go for the Trojan T105s... We all know those are great batteries...

I might be interested in your battery sources too for this upcoming season...

Roy Ken

Was what I was thinking. Wasn't sure if it was worth $20 and 7amps vs the known.

As far as sources go, I need to talk to them first and see if I can get a cut for referrals. Hehe

Paul Clancy wrote:
I have been running the US battery Xc 2200 for several seasons. Had t105 previously. Find they work the same for me. I don't believe the us battery Xc 2200 are made by interstate.

Seeing how Interstate is a distributor only, not hard for you to be correct there.

For only $10 per battery difference I would go on reputation alone with the Trojans. Seems like a wash :)

I have 8 US 1800XC golf cart batteries in series for 48 volts. They are connected to two Outback 3,600 watt inverters. This provides battery back up to my house during grid outages. It runs all my lights and small appliances and my well pump. I can ride thru for about 12 hours if I'm careful with usage. These batteries have been installed for nearly 3 years and are still working well.

I have been running the US battery Xc 2200 for several seasons. Had t105 previously. Find they work the same for me. I don't believe the us battery Xc 2200 are made by interstate.

I would be going with higher rating for less money.

I have 4 US 145 Batteries in our coach and they have been great.