Antfarm

Thanks Greenman and 87. I'll let you know how it all goes.

Thanks Greenman. That's a good point you make about being able to monitor the AC. I'll run 2 sets of cable in parallel, with each core being about 6AWG. I still need to get the rectifiers. Any recommendations?

Hi 87, I have a water turbine connected to a permanent magnet generator (http://www.motenergy.com/mepmge3.html), which generates 3-phase y-connected 48VAC, and should produce about 600W at the peak water flow available here. I need to connect it to an existing off-grid solar installation (48V BYD-BBOX batteries, Victron Multiplus). I plan to connect it directly to the battery bank, and use a tristar to dump excess power. So I need to run cable from the turbine to the battery banks, which is about 40m away. I have 2 choices for the cabling: 1) Rectify the current at the generator side and transmit +-54VDC single-phase via 2-core cable to the site of the batteries 2) Transmit the 3-phase power on 3-core cable at +-48VAC to the site, then rectify before connecting to the battery My question is which would be more efficient, given the cabling I specify above

Greetings, I have a 3-phase y-connected 48VAC PMG that I will connect to a 48V battery bank, located about 40m from the turbine. Must I rectify the current at the generator and then run a 2 core cable, or should I rectify at the battery bank and run a 3-core cable? I already have the cable, which is surplus from a previous project, being 2 x 40m lengths of 3core+earth. If I were to rectify at the battery bank, I would configure the cable to run 3 circuits in parallel. Efficiency is important here as it is small turbine and I need to get max power to the battery. The cable I have is aluminium with a diameter of about 4.5mm Thanks

Thanks for the input @GreenMan, @Kalahari Meerkat, @P1000 So to summarise, I should get 3 of 240/96 transformers as they will do the job and are likely to be available off-the-shelf, rather than needing to be made up. They do not need to be toroidal. Is this correct? Ideally I should then feed the rectified power into an MPPT (150V). If this MPPT is out of my budget then I need to go the load diversion/clamp route The maximum power potential from the water head is about 600 watts, so what maximum power rating should these transformers have? I assume it's less than 600w as it's spread across 3 phases. Any recommendations on where to get these in the Western Cape?

The generator recommended to me is a 3-phase permanent magnet PMA-1112, which would have a no-load output of 235V at 2096 rpm. "We want 208Vac to work with the 120V transformers connected in wye which gives 27V for windings losses with current. ".

The hydro power will feed in to my existing solar system: panels, BYD BBOX battery, Victron MPPT, Victron Quattro, victron Venus. Presently the BYD BMU protects the battery

I have a victron multiplus inverter/charger. Ideally I'd like to feed in the power to an MPPT to charge the batteries and protect the kit from the turbine, but cash is a constraint as it seems I need a 150V MPPT. So thought to charge the batteries direct and have a clamp or diversion control to protect from overspeeding

Greetings, as part of my microhydro system I need to connect a 3-phase AC generator to my 48V battery bank. I'm advised that as part of the connection I need 3 units of a 117Vac primary, 24Vac secondary transformer? 320W. (See attached spec sheet) I can get them from the USA but freight and tax are an issue. Can I get them off the shelf locally, or can I get them made-up? Thanks 732.242.pdf