Re: solar panel set up for sabre 32 on mooring
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FWIW:? The [a?] tech fellow at Ocean Planet told me about the +5V issue with Victron controllers, and for lower voltage panels he recommended the Genasun Boost controllers.? Seemingly they can increase the voltage to get the battery to charge.? My solution was to have 2 smaller panels wired in series to a VE Smart Solar controller, with a P&S pair of panels going to their own controller to hopefully reduce shading issues. ?Will see how it all works once installed.? ? Brian Escapade S426 CT / LIS ?
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From: [email protected] <[email protected]> On Behalf Of David Lochner via groups.io
Sent: Friday, May 2, 2025 7:13 PM
To: [email protected]
Subject: Re: [SabreSailboat] solar panel set up for sabre 32 on mooring? There are too many Davids and Brians. In an early post I thought we were talking about Brian¡¯s ?(Nauset Beach) new LFP installation. For small wattage solar panels the Victron Controllers are not a good choice. Victrons need the Panel voltage to be 5v higher than the battery voltage, thus, any panel with a Voc (Open Circuit Voltage) that is 17.5v or less will never work. Voc and wattage are related. Higher wattage panels and higher efficiency panels have higher a Voc than lower wattage panels.? A concern was raised about over charging, meaning over voltage charging by an unregulated panel. This can only happen if the panel¡¯s Voc is higher than the max voltage the battery can absorb, for LA batters between 14.2 and 14.8 usually. Since Voc is the maximum voltage the panel can produce, if it is in this range it is impossible to have an over voltage charge and the panel does not need a controller. That¡¯s why these small trickle chargers don¡¯t have controllers, they aren¡¯t needed.? ? Fair Haven, NY/Lake Ontario
On May 2, 2025, at 4:12?PM, SabreMando via groups.io <Games@...> wrote: ? MPPT unit from Victron works great.
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