Advice on Solar geyser installation

[faizk]

Good day , I am looking for some advice in relation to having a solar geyser installed on my property.
I live in Durban and from information gathered i am looking at having a 300lt Solar Beam , evacuted tubes Thermosiphon geyser installed. A friend of mine had one installed and he kept his high pressure geyser , basically the solar fed into the HP geyser and that fed into the house. His element was kept on the old geyser . I want to do the same ..Is this a good idea to keep the old geyser as a secondary storage tank?Any advice on any part of the installation is highly appreciated....I am looking at having a solar beam geyser installed
Thank you

 

[Gaz{M}]

No, why would you need more than 300L? Are you more than 5 people in the house?

Feeding the existing geyser is silly. It will then use the electric element all the time to boost the water to 55/60C.

The solar geyser has a controller that can be set to make sure the water is your desired temp at morning and at night. No need for "additional storage".

I would keep the existing geyser as a backup in case you have many visitors staying with you. Maybe you can plumb it with bypass valves.

 

[RudderVator]

No, why would you need more than 300L? Are you more than 5 people in the house?

Feeding the existing geyser is silly. It will then use the electric element all the time to boost the water to 55/60C.

The solar geyser has a controller that can be set to make sure the water is your desired temp at morning and at night. No need for "additional storage".

I would keep the existing geyser as a backup in case you have many visitors staying with you. Maybe you can plumb it with bypass valves.

Why would it be silly to feed the existing electric geyser with the warm/hot solar geyser water?
Would he not just need to turn it off at the DB and turn it on if he runs cold on Solar if needs be? At least OP would then have a backup for those cloudy weeks.

Sure the temperature of solar would exceed lets say 45c most of the time? So the moment the temp drops 10c below set temperature then the thermostat would kick in?
Or am I missing something