Very interesting. Could you explain your set up in detail for me please? Currently just have one 24ah battery like in the trolley systems so I guess this won't suffice for two pumps and controllers?
Don Kee got in first.
No it wont be sufficient.
Most trolleys have a small low amp motor. You will need the bigger Shurflo pumps (or equivalent) that are powerful enough to push a flow of water down 100 meters of small bore hose and then up to height. These pumps under load can draw anything up to 6 amps although ours run at around 4.5 to 5 amps.
Asking a 24 amph battery to do that is expecting a bit much.
In theory you will get 5 hours of pumping from this battery before it is flat drawing 5 amps per hour. However, most batteries won't tollerate being flattened and work well if they aren't run down below 50% discharge. This means that a 24 amph battery will drive your pump for 2.5 hours. From our own experience, I believe we spend about 50% of our time actually pumping water and washing windows on residential. By extension, a 24 amph battery will last around 2/3rd of your day just powering one pump.
Using a split charge relay to charge a 24 amph battery will probably damage the battery in the same way my son cooked his Honda motor cycle battery when he decided to stick an 8 amp car battery charger on it.