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Thermal Stores > Akvaterm Thermal Stores > Akvaterm Solar Thermal Stores

Akvaterm Solar Thermal Stores

Akvaterm Akva Solar Thermal Stores

Akva Solar accumulator tank

The Akva Solar tank is designed for use with heating systems that incorporate solar thermal heating. The Akvair Solar accumulator tanks all have a solar coil installed at the bottom of the tank.

akvair solar accumulator tank cut out
For domestic hot water there are 2 coils installed, one at the bottom of the tank, one at the top. The water in the bottom of an accumulator tank should be much cooler than the water at the top (a sign of good stratification). The cold mains water supply is run through the first coil at the bottom of the tank - which raises the water to this lower temperature, typically 30-40 degrees. The water then goes to the top coil where it is brought up to temperature. Because it was preheated in the bottom coil less heat is taken from the very hot water at the top of the tank which helps to maintain that nice hot water at the top = good stratification.

Each Akvair Solar accumulator tank comes with a solar baffle. The solar baffle is essentially a round plate of metal about half way up the tank which splits the tank into two compartments, a top and a bottom. In the middle of the round plate there is a round 150mm hole. When the solar coil is heating the bottom of the tank it is liable to create water currents in the tank. This could potentially mix the cooler water at the bottom of the tank with the hot water at the top resulting in a mixed (badly stratified) tank of warm water. The baffle stops the water at the bottom of the tank from mixing with the hot water at the top, but at the same time still allows water up into the top of the tank as and when needed.

Like the AkvaStandard thermal stores the Akvair Solar tanks have tappings which allow you to link in a heat source (like a boiler stove) to the tank, 2 tappings for electrical immersion elements (for backup heating), a place to attach a thermostat, and a tapping on top for the pressure relief / air bleed.

The Akvaterm Akair Solar thermal store is rated at 3 bar which means you can install it on vented or pressurised systems. Our heating engineer can assist you with determining which size of accumulator tank is right for you and can help you to plan a renewable heating system which really works. Generally a high output boiler stove will require a larger volume of water than that needed for the solar thermal. So the size of the Akvair Solar accumulator tank is usually determined by the size of the boiler stove - as long as the boiler stove is intended to heat the whole tank in the winter, not just contribute in a smaller way to heating the tank.

An upgrade from the Solar tank is the Solar Plus. The Solar Plus tank means that you can effectively provide domestic hot water from a large accumulator tank. The Solar Plus has an extra solar coil at the top of the tank. The hot water from the solar panels is directed first to the bottom coil until the temperature has gone over 53ºC at which point it starts to be routed to the top coil. By directing the warm (but not hot) solar hot water to the bottom of the tank this heat is captured and, if the top of the tank is not above that temperature already, then this heat will then also spread to the top of the tank through the solar baffle. Once the solar hot water starts to shift over to the top solar coil the top of the tank will heat up very fast giving a very fast response time, which is especially important with larger accumulator tanks. The solar hot water is still going through the bottom coil which will pass any remaining heat into the bottom of the tank. This means that more total energy is recovered from the solar panels than would otherwise be the case, plus the tank reacts faster than a single coil version so you have usuable domestic hot water in less time. The Solar Plus comes with an Oras valve as standard which cleverly makes use of both hot water coils. Our Solar tanks also come with this valve as standard as we think it makes great sense.

You will find details for the Akvair solar tanks below. The DHW (Domestic Hot Water) coil is 9.4m long and made of 22mm finned copper tube, the solar coil is 12.2m long and made of 18mm finned copper tube.

We have a range of immersion elements in stock. Of note are the 1kW and the combined 1kW and 3kW immersions. These are ideal for use with PV systems because the Feed In Tariff assumes that you consume 50% which in actual fact you usually do not. So you may have either an intelligent controller which diverts 50% of the electricity produced, storing it as hot water in the thermal store, or a more simple setup using a timer to achieve the same end. For a 4kW system the 1kW and the combined 1kW and 3kW immersions are most suitable.

Key features :

  • Insulation – sprayed on polyurethane. Thickness – 100mm
  • Coils:
    Solar Coils – Yes
    Extra Solar Plus coil – Yes (apart from the 300 litre)
    Domestic Hot Water coil – Yes
    Pre-heat Domestic Hot Water coil - Yes
  • Coil material – Copper
  • Finned coils – Yes
  • Coil length:
    Solar coils – Lower 13.1m @ 22mm diameter
    Upper 13.1m @ 22mm
    DHW coils – Lower 12m @ 18mm
    Upper 6m @ 18mm
  • Tank Baffle – Yes
  • Flush mounted tappings – Yes
  • Number of tapping points - 16
  • Suitable for open vented or pressurised systems - Yes
 

We pride ourselves on offering a great service which we hope will quickly become apparent when you deal with us. At the same time we like to balance that by being competitive and we are keen for you to choose us. So if you are offered a better deal elsewhere then let us know and we will beat it.

Contact Us Ring stovesonline on these phone numbers

Ring Stovesonline on 0845 226 5754 | 01803 712316 | 01580 201385 When you ring Stovesonline you will never be held in a queue, given options or made to listen to music. If we are too busy to answer immediately then simply leave your name and number on the answer phone and we will ring you straight back.

Or write to us via our enquiry system

Akvaterm Akva Solar Thermal Stores details
PRODUCTHEIGHTDIAMETERINSULATION THICKNESSPRESSURE RATINGPRICE
AKVATERM AKVA SOLAR 300 LT TANK 3 COIL2050 MM810 MM70 mm3 BAR£2,205.11
AKVATERM AKVA SOLAR 500 LT TANK2050 MM900 MM100 mm3 BAR£2,385.63
AKVATERM AKVA SOLAR 750 LT TANK2100 MM1050 MM100 mm3 BAR£2,596.53
AKVATERM AKVA SOLAR 1000 LT TANK2100 MM1150 MM100 mm3 BAR£2,955.30
AKVATERM AKVA SOLAR 1500 LT TANK2150 MM1350 MM100 mm3 BAR£3,534.89

Akvaterm Akva Solar Thermal Stores extras
STOVESONLINE 1KW IMMERSION£115.08
STOVESONLINE 3KW IMMERSION£80.64
STOVESONLINE COMBINED 1KW AND 3KW IMMERSION£179.09
STOVESONLINE 6KW IMMERSION£158.93
DIAL THERMOMETER - EXTRA SMALL PROBE£18.50
SAFETY GROUP£65.00
EXTRA 2 1/2 INCH TAPPING£82.05
GRAVITY COIL£320.00
REMOVABLE SIDES FOR THE TANK FOR NARROW ACCESS£131.28
BROCHUREpdf iconView

Akvaterm Solar Plus Thermal Stores

 

We pride ourselves on offering a great service which we hope will quickly become apparent when you deal with us. At the same time we like to balance that by being competitive and we are keen for you to choose us. So if you are offered a better deal elsewhere then let us know and we will beat it.

Contact Us Ring stovesonline on these phone numbers

Ring Stovesonline on 0845 226 5754 | 01803 712316 | 01580 201385 When you ring Stovesonline you will never be held in a queue, given options or made to listen to music. If we are too busy to answer immediately then simply leave your name and number on the answer phone and we will ring you straight back.

Or write to us via our enquiry system

Akvaterm Solar Plus Thermal Stores details
PRODUCTHEIGHTDIAMETERINSULATION THICKNESSPRESSURE RATINGPRICE
AKVATERM AKVA SOLAR 500 LT PLUS2050 MM900 MM100 mm3 BAR£3,047.81
AKVATERM AKVA SOLAR 750 LT PLUS2100 MM1050 MM100 mm3 BAR£3,406.58
AKVATERM AKVA SOLAR 1000 LT PLUS2050 MM1150 MM100 mm3 BAR£3,647.26
AKVATERM AKVA SOLAR 1500 LT PLUS2150 MM1350 MM100 mm3 BAR£3,986.17

Akvaterm Solar Plus Thermal Stores extras
STOVESONLINE 3KW IMMERSION£80.64
STOVESONLINE 6KW IMMERSION£158.93
DIAL THERMOMETER - EXTRA SMALL PROBE£18.50
SAFETY GROUP£65.00
EXTRA 2 1/2 INCH TAPPING£82.05
GRAVITY COIL£320.00
REMOVABLE SIDES FOR THE TANK FOR NARROW ACCESS£131.28
STOVESONLINE 1KW IMMERSION£115.08


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