FRZ0n

Larger batteries... less strings :-)

Hi FRZ0n,
Is both geysers close to each other or very far away?
If they close together, I would combine them to give a total storage of 300L. That will work great for solar heating.
Still keep one heatpump and use that for backup, rather than elements.
Through a lot of experimentation I found the best solar water heating to be a pumped system with a decent controller. Vacuum tubes works way better than flat plates, but they do cost more.
I have to ask why such a huge heatpump was installed on a 150L geyser?

Hi. This is my first post and i need guidance
 
I am planning to go grid tied over the next few months. I already have an Axpert 5kva inverter and will get my second one this week. Will take a few months to sort out.
I need to probably add about 20kwh max overnight with the inverters and batteries but that will be sorted later.
My problem is I have electrical geysers with heat pumps which are not optimised. No timer switches. I want to convert to solar
One geyser is a 150L Kwikot and the other is a Duratherm 150L (3kw element).
The heat pumps are Tasol TAS4-DU Heat Pump - 5.2 kw models. 
I want to replace the geysers with a solar solution and integrate with the heat pumps. 
Its a minefiled. Not sure what to get.
1) What is the system i should consider. Evacuated tubes or flat panel and with a low consumption backup electrical. With timer switch added.
2) Times for hot water are for afternoon/evening and morning
3) Recommend a company to me to install in Ormonde near gold reef city.
4) I dont want to spend a fortune coz the whole backup solar system is going to cost me a fortune..
5) Dont want to retrofit unless the elements in the existing geysers can be downgraded to say 1kw elements. I hope that can be done.
Any advice would be appreciated
Thx