Hi,
I'm taking over a remote off-grid site (no grid anywhere near) that has an existing +48 VDC battery bank, and ancient charge controller, and some older panels that are in pretty good shape. There's also an AC generator that charges through a separate AC-to-+48VDC charger. As part of upgrading a few things, I may need to replace a few panels, add some new panels, replace the +48 VDC charge controller, and possibly the generator 48 charger as well. I'd LOVE to update existing and new panels using per-panel MPPT optimizers, but to do so I need to find a great non-MPPT-but-optimizer-compatible charge controller. Any ideas or recommendations for such a charge controller? I'd love a system that perhaps combined AC-from-a-generator charging of the +48V batteries as well as solar panel charging--but if not, no big deal. What cannot and will not change is the battery system. They're quite new, and the equipment is all set up on the +48v (negative ground) power system. That's non-negotiable.
Benefits of going with per-panel optimizers to me are partially shaded panels in winter (from snow), varying outputs due to the panels being older, and mismatched panels (new ones likely will be higher wattage).
I do NOT want any systems that require "cloud" or network connectivity. All functionality must not require connections. And I'd love stuff I can monitor myself (likely via ethernet/IP talking to a Raspberry Pi system, etc.--but MODBUS over IP works too...)
Suggestions?
I'm taking over a remote off-grid site (no grid anywhere near) that has an existing +48 VDC battery bank, and ancient charge controller, and some older panels that are in pretty good shape. There's also an AC generator that charges through a separate AC-to-+48VDC charger. As part of upgrading a few things, I may need to replace a few panels, add some new panels, replace the +48 VDC charge controller, and possibly the generator 48 charger as well. I'd LOVE to update existing and new panels using per-panel MPPT optimizers, but to do so I need to find a great non-MPPT-but-optimizer-compatible charge controller. Any ideas or recommendations for such a charge controller? I'd love a system that perhaps combined AC-from-a-generator charging of the +48V batteries as well as solar panel charging--but if not, no big deal. What cannot and will not change is the battery system. They're quite new, and the equipment is all set up on the +48v (negative ground) power system. That's non-negotiable.
Benefits of going with per-panel optimizers to me are partially shaded panels in winter (from snow), varying outputs due to the panels being older, and mismatched panels (new ones likely will be higher wattage).
I do NOT want any systems that require "cloud" or network connectivity. All functionality must not require connections. And I'd love stuff I can monitor myself (likely via ethernet/IP talking to a Raspberry Pi system, etc.--but MODBUS over IP works too...)
Suggestions?
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