I høst skal jeg installere sol/vind anlegg på stølen. I den forbindelse har jeg gjort mengder av research, selvsagt, for å finne beste løsning, og unngå overkill med tanke på behovene der oppe. Mens solenergi fortsatt er på barnestadiet her hjemme, har det eksplodert i USA, UK og Tyskland, med mengder av hjem som enten har gått helt off-grid og leverer sin egen strøm; eller som leverer overskuddsstrøm til nettet, i mange tilfeller noe de får betalt for.
Slike anlegg har ulike nivåer, fra superenkle som leverer 12V, til avanserte som leverer 15KWh/dag med 230V i perfekt sinus og null avvik på frekvens. Skal du få til sistnevnte bør du ha en eiendom som er sydvendt, har godt solinnfall og der du kan legge solcellepaneler på hele taket. Men slikt kreves ikke i mitt tilfelle, heldigvis.
Sist jeg nevnte dette, så dukket det merkelig nok opp en artikkel med reportasje fra Definitive Audio, som faktisk har tatt i bruk nettopp et slikt anlegg som det jeg beskriver i starten av tråden.
6moons industry features: RoadTour Living Voice
Her er batteribanken, og under er oppsettet med ladere og invertere. I deres tilfelle, så tar de strøm fra nettet, bruker denne for å lade batteribanken, og så trekker de strøm de har perfekt kontroll over via inverter og frem til anlegget i lytterommet. De mener selv at dette gir store utslag på lyden.
Hva koster et godt anlegg? Vel - hvis man ikke skal styre med solcellepaneler eller vindgenerator, så er det snakk om å kjøre strøm via lader/inverter til en batteribank, og så trekke strøm fra denne til anlegget via inverter. Avhengig av hvor mye anlegget trekker så dimensjonerer man i forhold - enkelte av disse inverterne brukes på større båter, for å rense landstrøm, og man kan legge opp et slikt anlegg hjemme, uten batteribank. Da snakker vi om hva en inverter koster, og her får man meget gode for under 50.000
Utfra hva jeg kan se på bildene fra Living Voice/Definitive Audio, vil jeg anta at batteribank, ladere, invertere og styreenheter, samt montering, har kommet på i overkant av 120.000
Dette er hva de selv sier om effekten det gir:
6moons industry features: RoadTour Living Voice
"On battery drive: The amount of clutter and artifacts battery drive gets rid of which you previously blamed on the loudspeaker or electronics is amazing. If I go into the mill on Saturday or Sunday—and bear in mind that we’re the only business there which occasionally works over the weekend—we’re on a separate power sub station so all of those powerful solenoid winches that lift things up, all the office computers and assembly machines are off. Then the sound quality from the national grid is fantastic. You’ve got that vanishingly low impedance and no turbulence or hash on the ground. The sound is calmly powerful, beautifully resolved, succulent without being overripe and has that heterogeneity of the emotional expression, the separation of the textures. The whole thing is just socalm and assured and actually better than the batteries. But every other time of the week I plug the system into the national grid, it’s just awful. There was a time when I couldn’t do any demos on Thursdays at all because that's when the textile plant in the vicinity ran its big dying machine which agitates all of their fabrics with that massive solenoid. The sound on Thursdays was simply appalling. With anyone coming in from London for an appointment, we’d be utterly humiliated and embarrassed. |
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One of my clients has a house in the Far East and a yacht. For his marine Kondo/Living Voice system, I wanted a battery supply that would be separate from the general power for his boat. That’s how we first got in contact with the right people for whom we laid out our requirements and who then programmed how various power inverters and chargers should work. The same client had four power cuts in his house alone while I was there to install our off-the-grid supply. This battery solution became a real life saver for him. With another customer in the south of France and a big Kondo Gakuoh/Living Voice system, the sound was atrocious yet I had no explanation why - until I stuck my multi meter into his power line and measured 192V instead of 230V. Undervoltaging a filament on a valve amp is worse than overvoltaging it. With the wrong high-tension voltage, wrong negative grid supply and wrong heater voltage, he wasn’t listening to the amplifier as it was designed to operate. Line voltage stabilization from batteries was the perfect solution - again.
When I combined this case evidence with my own work situation, it was a clear case of getting on with it and I’m thoroughly delighted with the outcome. Ours are sealed gel rather than water batteries so whilst having higher impedance, they’re incredible safe and durable and work in difficult circumstances. You can use them on their sides or upside down without problem. There also areludicrous 2V cells which you would use in a forklift truck or milk float. For all 12V applications, you'd parallel six. These are massive and I'd fancy having 12 or 24 of those. They have incredibly low impedance and massive surge capability. That should really be saucy. They’re very long but narrow so you could lay them sideways and slide them into a special rack like torpedoes. An amplifier after all is no more than a modulated power supply. Many people would be better off with a more modest system that's run off such a stable battery supply." |
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