Need some advice. I am building a truck, intended purpose is hard off-roading. It has a very small low profile living/storage/systems area. I have been trying to educate myself but to be honest the amount of knowledge you have to have to make good choices and find the right suppliers/products is more than I have time to acquire. Being completely honest I am looking for a bit of spoon feeding.
I have built trucks like this before and one of the biggest issues has been battery capacity and recovery time when extended duration and/or heavy winching is required. In the past with dual lead acid batteries, after 2 or 3 minutes of heavy winching batteries are exhausted to the point winching performance has seriously declined and you are best to sit there for a while and let the truck charge. If you have a legitimate 8 to 10 minutes of winching you could be there for a couple hours waiting for the LA batteries to recover to make it the last 30 seconds.
Here is what I think I want to do from the 10,000’ view:
I have a Yamaha EF2400iSHC inverter generator capable of 2kW continuous.
My intention is to use this inverter/charger:
http://www.xantrex.com/power-products/inverter-chargers/freedom-sw-12v_newgen.aspx
and 8 or 12 of these 200ah cells (or similar) in 2 or 3 12v batteries:
https://www.electriccarpartscompany.com/200Ah-CALB-SE-Batteries
I have no idea what BMS to use. If 2 batteries they need to be capable of at least 250amps. If 3 batteries then at least 160 amps.
All to power this winch:
http://www.warriorwinches.com/warrior-winches/premium-winches/samurai-20000-electric-winch-synthetic#
Winch specs:
I had thought to use the 24v version but its no load line speed is painfully slow and not only is it still slower under full load but it pulls way more than half the current of the 12v.
The idea is that if I have a huge and/or long pull, I pull the cord on the generator and start winching. Winches can usually only tolerate a 50% duty cycle under load and if operating at 480amps you are probably best to operate at about 20%, the generator is charging the whole time. There are other loads but these can be disabled while winching if necessary. I have no intention of any solar in the system at this time, I like to park in the shade. I might add a small amount at some time just to maintain the system during long idle periods if that makes any sense.
If anyone can provide me with input/direction/caution it is much appreciated.
Tim
I have built trucks like this before and one of the biggest issues has been battery capacity and recovery time when extended duration and/or heavy winching is required. In the past with dual lead acid batteries, after 2 or 3 minutes of heavy winching batteries are exhausted to the point winching performance has seriously declined and you are best to sit there for a while and let the truck charge. If you have a legitimate 8 to 10 minutes of winching you could be there for a couple hours waiting for the LA batteries to recover to make it the last 30 seconds.
Here is what I think I want to do from the 10,000’ view:
I have a Yamaha EF2400iSHC inverter generator capable of 2kW continuous.
My intention is to use this inverter/charger:
http://www.xantrex.com/power-products/inverter-chargers/freedom-sw-12v_newgen.aspx
and 8 or 12 of these 200ah cells (or similar) in 2 or 3 12v batteries:
https://www.electriccarpartscompany.com/200Ah-CALB-SE-Batteries
I have no idea what BMS to use. If 2 batteries they need to be capable of at least 250amps. If 3 batteries then at least 160 amps.
All to power this winch:
http://www.warriorwinches.com/warrior-winches/premium-winches/samurai-20000-electric-winch-synthetic#
Winch specs:
Line Pull lbs (kgs) | Line Speed ft/min (m/min) | Line Speed 24v ft/min (m/min) | Amp Draw 12v | Amp Draw 24v |
0 | 19.7 (6.0) | 13.8 (4.4) | 100 | 40 |
6000 (2728) | 7.2 (2.2) | 6.9 (2.1) | 220 | 100 |
10000 (4545) | 5.6 (1.7) | 5.9 (1.8) | 320 | 140 |
12500 (5682) | 4.9 (1.5) | 5.2 (1.6) | 350 | 180 |
14000 (6350) | 4.6 (1.4) | 4.6 (1.4) | 380 | 200 |
17500 (7938) | 3.0 (0.9) | 3.9 (1.2) | 450 | 250 |
20000 (9072) | 3.6 (0.9) | 3.3 (1.0) | 480 | 265 |
The idea is that if I have a huge and/or long pull, I pull the cord on the generator and start winching. Winches can usually only tolerate a 50% duty cycle under load and if operating at 480amps you are probably best to operate at about 20%, the generator is charging the whole time. There are other loads but these can be disabled while winching if necessary. I have no intention of any solar in the system at this time, I like to park in the shade. I might add a small amount at some time just to maintain the system during long idle periods if that makes any sense.
If anyone can provide me with input/direction/caution it is much appreciated.
Tim