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OK you got me confused here.
A T-105 is 6 volts @ 225 AH works out to 1350 Watt Hours of capacity. At $160 unit cost is $160/1350 wh = .1185.wh.
The Rolls S-460 is 6 volts @ 350 AH works out to 2100 watt hours. At $326 unit cost is $326/2100 wh = .1552/wh
Anyway what has me confused is 4 of the Rolls S-460 at the 20 hour rate has 4 x 2100 wh = 8400 watt hours capacity. 4 of the T-105's has 4 x 1350 wh = 5400 watt hours. It would take roughly 6 of the T-105's to equal 4 of the Rolls.
If you are going to go with T-105's at least use the T-105RE line up. But if you intend to use 8 of them in a 24 volt configuration means you will have to have two parallel strings which is going to significantly shorten the battery life. If you are going to use 8 of the T-105's I would recommend you configure them as 48 volts instead of 24 volts. If you use say a Outback FM 60 MPPT charge controller you can grow the system to 3200 watts vs 1600 at 24 volts.
I also encourage you to drop the PWM controller and move up to MPPT. A 500 watt panel wattage using a MPPT controller wil generate as much energy as your proposed 760 watt on a PWM controoler. There is also a added benefit of using MPPT controllers. You are not trapped into use solar panels made for battery systems. You can use panels made for Grid tied applications which as less expensive than battery panels.
You also get one more added benefit with MPPT controllers. You can run th epanel voltage much higher. That means less losses using much smaller less expensive wire. So overall you save quite a bit of money right up front using MPPT controllers. Panel $/w cost is lower, use less wattage, lower line losses, and less expensive wiring and installetion cost. Do that and you will be able to afford good batteries like the Rolls.
Did they tell you that on the other forum?
A T-105 is 6 volts @ 225 AH works out to 1350 Watt Hours of capacity. At $160 unit cost is $160/1350 wh = .1185.wh.
The Rolls S-460 is 6 volts @ 350 AH works out to 2100 watt hours. At $326 unit cost is $326/2100 wh = .1552/wh
Anyway what has me confused is 4 of the Rolls S-460 at the 20 hour rate has 4 x 2100 wh = 8400 watt hours capacity. 4 of the T-105's has 4 x 1350 wh = 5400 watt hours. It would take roughly 6 of the T-105's to equal 4 of the Rolls.
If you are going to go with T-105's at least use the T-105RE line up. But if you intend to use 8 of them in a 24 volt configuration means you will have to have two parallel strings which is going to significantly shorten the battery life. If you are going to use 8 of the T-105's I would recommend you configure them as 48 volts instead of 24 volts. If you use say a Outback FM 60 MPPT charge controller you can grow the system to 3200 watts vs 1600 at 24 volts.
I also encourage you to drop the PWM controller and move up to MPPT. A 500 watt panel wattage using a MPPT controller wil generate as much energy as your proposed 760 watt on a PWM controoler. There is also a added benefit of using MPPT controllers. You are not trapped into use solar panels made for battery systems. You can use panels made for Grid tied applications which as less expensive than battery panels.
You also get one more added benefit with MPPT controllers. You can run th epanel voltage much higher. That means less losses using much smaller less expensive wire. So overall you save quite a bit of money right up front using MPPT controllers. Panel $/w cost is lower, use less wattage, lower line losses, and less expensive wiring and installetion cost. Do that and you will be able to afford good batteries like the Rolls.
Did they tell you that on the other forum?
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