Not enough hot water
If there has been very cloudy weather and all the water in the storage tank has been depleted, your boost element may be connected to Off-Peak 1 tariff and it will only run when supply is available. If your system is connected to Off-Peak 1 contact your l
Water not hot enough
The booster element may not be operating Check that the isolating switch marked 'hot water' or 'water heater' at the switchboard is in the on position. Also check if the fuse has blown and/or check if the circuit breaker has tripped. 
No hot Water
The solar controller may not be running. Check the power is on and the green LED marked 'solar' is lit. If the power is off, switch the power back on.