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Prioritise PV output to DHW ?

Solar Photovoltaic (PV)

Last Post by Lenny 9 months ago

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Lenny

(@lenny)

Trusted Member Member

410 kWhs

Joined: 12 months ago

Posts: 18

Topic starter 07/08/2023 9:17 am

I have ASHP and a PV array. (only been in for 3 months)

Even on dull days I am reading a +balance on the IHD.

I'm on Octopus "Cosy" and waiting for then to start FITT "connection".

The IHD , obviously (somehow?), knows which bit of power is from the PV array ............... is there a device that would

send any balance, when there is one, to top up the DHW if needed ?

Samsung 12kw ASHP, nine 415w PV panel array, upgraded radiators and DHW water tank (+ pumps etc). Two wireless zone thermostat controllers and Samsung MWR-WW10N

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iancalderbank

(@iancalderbank)

Noble Member Contributor

3640 kWhs

Joined: 2 years ago

Posts: 644

07/08/2023 10:18 am

yes. myenergi eddi, marlec solar iboost, and others that I can't remember the names of, are devices that do exactly this. you will typically be able to get all your DHW in the summer and a fair chunk in the spring / autumn.

Although depending on your tariff you'll have to do the maths on whether its better to export, use it to power the ASHP for the DHW, or use the PV directly.

I actually have an Iboost in my garage that is FTAGH, (an older version that didn't play nicely with battery storage so I swapped it for an Eddi) if you are anywhere near milton keynes you're welcome to it.

My octopus signup link https://share.octopus.energy/ebony-deer-230
210m2 house, Samsung 16kw Gen6 ASHP Self installed: Single circulation loop , PWM modulating pump.
My public ASHP stats: https://heatpumpmonitor.org/system/view?id=45
11.9kWp of PV
41kWh of Battery storage (3x Powerwall 2)
2x BEVs

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Lenny

(@lenny)

Trusted Member Member

410 kWhs

Joined: 12 months ago

Posts: 18

Topic starter 07/08/2023 5:13 pm

@iancalderbank

Thanks for the reply. I'm in Worcester but ........

How much do you want and what is included ?

Samsung 12kw ASHP, nine 415w PV panel array, upgraded radiators and DHW water tank (+ pumps etc). Two wireless zone thermostat controllers and Samsung MWR-WW10N

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Lenny

(@lenny)

Trusted Member Member

410 kWhs

Joined: 12 months ago

Posts: 18

Topic starter 09/08/2023 8:48 am

DOH .. I have just realised what FTAGH means 😊

Samsung 12kw ASHP, nine 415w PV panel array, upgraded radiators and DHW water tank (+ pumps etc). Two wireless zone thermostat controllers and Samsung MWR-WW10N

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iancalderbank

(@iancalderbank)

Noble Member Contributor

3640 kWhs

Joined: 2 years ago

Posts: 644

09/08/2023 11:22 am

@lenny yes, free - sorry, I can be guilty of too many acronyms. although if you are able, please make a red cross donation of what you feel its worth. Not the kind of thing that will get taken on freecycle and I don't want to take it to the tip whilst someone could still use it.

I have the iboost unit itself (which has to wired inline on the immersion heater power cable), and the CT clamp that goes on the meter cable. the CT clamp has a wireless transmitter to talk to the main unit.

exactly what is in these pics if you google it:

It was working when I took it out.

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Lenny

(@lenny)

Trusted Member Member

410 kWhs

Joined: 12 months ago

Posts: 18

Topic starter 10/08/2023 12:05 pm

Many thanks.

I would love to come and collect. How do you want to arrange this ?

(donation to MS Society if that's OK with you, son has MS)

Samsung 12kw ASHP, nine 415w PV panel array, upgraded radiators and DHW water tank (+ pumps etc). Two wireless zone thermostat controllers and Samsung MWR-WW10N

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iancalderbank

(@iancalderbank)

Noble Member Contributor

3640 kWhs

Joined: 2 years ago

Posts: 644

10/08/2023 1:11 pm

@lenny I'm of course absolutely fine with your choice of charity, particularly as it is personally relevant to you. I'll PM you.

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Lenny

(@lenny)

Trusted Member Member

410 kWhs

Joined: 12 months ago

Posts: 18

Topic starter 10/08/2023 2:06 pm

@iancalderbank

Thanks. Seen PM but cant reply to them yet 🙂

thanks

Samsung 12kw ASHP, nine 415w PV panel array, upgraded radiators and DHW water tank (+ pumps etc). Two wireless zone thermostat controllers and Samsung MWR-WW10N

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