I am new to the forum and have been studying a few threads, but couldn't find answer to our question so I thought I'd post it here - feel free to direct me to other posts if easiest! Contact online >>
I am new to the forum and have been studying a few threads, but couldn''t find answer to our question so I thought I''d post it here - feel free to direct me to other posts if easiest!
We are building a passive house and now need to specify the DHW tank. The house will have a large PV array, a battery, and direct electric heating (combination of small underfloor pads, electric towel rail and infra red panels).
I have been going back and forth between a sunamp Thermino ePV 300 and a Mixergy with a 3rd party PV diverter.
I plan to use home assistant which may give me an option of overcoming some of the short comings of each system.
I like the sunamp because of its low heat leakage and small footprint.
It would be great to get any advice/pointers/opinions on this choice and what I should take into account.
Whereas a standard cylinder needs to heat the entire volume both the sunamp and the mixergy should focus all the heating in a smaller volume that you can then use a lot quicker
Not entirely true, even heating a low immersion the heat will settle after a soon period at the top of the cylinder.
Just get a custom built uvc specify 2 or 3 immersions, to give lots of flexibility but also include a 3m2 coil just in case you want an ASHP later. Then just use relays or similar so you PV diverter heats top middle and bottom immersion in that order.
But why not look at cylinder with an heat pump in it, CoP of 3, better use of solar when it''s available.
Mixergy cylinders are quite good. Give them a call and speak to them and they will explain them in detail. Having the ability to heat the cylinder at cheap electric times and also to be able to heat what you need is a great feature. We have come across quite a few people that have them now and everyone we have spoken to seems happy with them. Better than a conventional direct unvented cylinder and cheaper than the Thermino although I don''t know much about the Sunamp heat batteries so I can''t express much of an opinion on them.
Passive House with just electric rad heating and 300L direct UVC on immersion here. 100% of DHW on cheap night rate (14c/kWh) and about 40% of space heating on day rate (48c/kWh)
For space heating a single A2A unit in central area for the bulk of space heating/cooling with electric resistive in the bathrooms to boost them is cheapest over a lifetime.
ASHP on UFH has very low running costs but is offset by the cost of installing first day and care is needed to get good COPs.
Direct electric is expensive even with our modest heat demand of about 3MWh/annum. Planning on an a2a soon.
ASHP not really worth it for DHW as the COP really drops off above 40deg and you need to have tremendous amounts of storage to heat only on night rate.
PV with divert is the cheapest here I reckon. With 2 adults and 2 small kids we use 10kWh per day. A 300l cylinder at 70deg suffices easily for the full day as it stores about 14kWh.
If you went for a 500l or left space for a 300l X 2 you would be well covered.
I designed and built our last house which was a PH. It was heated with three electric towel rails in the bathrooms and three square meters of electric UFH in the kitchen. A Genvex Combi 185LS supplied DHW heated with a built in EASHP. When required the EASHP also supplied warm air heating through the MVHR ducting.
Better than a conventional direct unvented cylinder and cheaper than the Thermino although I don''t know much about the Sunamp heat batteries so I can''t express much of an opinion on them.
The Thermino is a Sunamp, rebranded, eg the same device from the same people.
I''m not a fan of the Mixergy tanks, too much complication / faff / additional components / additional heat loss from the PHE / cost of running and replacing the pump and so on.
For DHW, simply follow the KISS rule. Adding a second low slung immersion in a well-insulated UVC is all you''ll ever need, and you wont ever convince me otherwise. Just an unnecessary over-complicated re-invention of an already time-proven wheel.
and direct electric heating (combination of small underfloor pads, electric towel rail and infra red panels).
About Sunamp vs mixergy
As the photovoltaic (PV) industry continues to evolve, advancements in Sunamp vs mixergy have become critical to optimizing the utilization of renewable energy sources. From innovative battery technologies to intelligent energy management systems, these solutions are transforming the way we store and distribute solar-generated electricity.
When you're looking for the latest and most efficient Sunamp vs mixergy for your PV project, our website offers a comprehensive selection of cutting-edge products designed to meet your specific requirements. Whether you're a renewable energy developer, utility company, or commercial enterprise looking to reduce your carbon footprint, we have the solutions to help you harness the full potential of solar energy.
By interacting with our online customer service, you'll gain a deep understanding of the various Sunamp vs mixergy featured in our extensive catalog, such as high-efficiency storage batteries and intelligent energy management systems, and how they work together to provide a stable and reliable power supply for your PV projects.
