Which setting to choose on LRM 1218 regulator

Discussion in 'Solar Power' started by Tony M, Jun 17, 2016.

  1. Tony M

    Tony M Funster

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    I'm in the process of installing a 120 watt solar panel to my Globecar which has a Schaudt EBL 119 Elektroblok (basically a 99 with an AGM setting for the charger) and a Varta Professional LA95 dual purpose AGM leisure battery.

    I've splashed out on a Schaudt LRM 1218 MPP solar regulator which has three possible settings depending on battery type and I was wondering if anyone could suggest which would be the correct one.

    The first is for lead acid so obviously it's not that but these are the two I have to choose from:
    AGM 1 / Lead-gel.
    Charging voltage: 14.4 volts. Charge retention voltage: 13.8 volts. Time phase: 12 hours.

    AGM2
    Charging voltage: 14.7volts. Charge retention voltage 13.7 volts. Time phase: 4 hours.

    I emailed Udo Lang at Schaudt but he just suggested I contact Varta which I have done, but not had a reply. Anyone got any ideas which is best?
     
  2. JeanLuc

    JeanLuc Funster

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    I would contact Varta technical for complete certainty, but their guide to leisure batteries states the following for AGM:
    • Absorption phase 14.8V
    • Float (retention) 13.8V
    Nothing about the time required for charging but it does suggest a charging current of 25-35% of the nominal Ah capacity of the leisure battery bank.
     
  3. Tony M

    Tony M Funster

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    JeanLuc, thanks for that. The absorption phase would suggest I choose the AGM 2 setting but the float would suggest AGM 1. Which is best I wonder?
    Still hoping for a reply from Varta.
     
  4. JeanLuc

    JeanLuc Funster

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    I telephoned them and got answers to my questions straight away.

    Johnson Controls Batteries Limited
    Suite 5, Building 6, Croxley Green Business Park, Hatters Lane
    WD18 8YR
    Watford
    United Kingdom
    Tel: +44 (0) 1895 515650
    Fax: +44 (0) 1923 630899
    E-mail: info-uk@varta-automotive.com
    Website: http://www.varta-automotive.com
     
  5. Tony M

    Tony M Funster

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    Got the answer from Varta - AGM 2 setting.
    Thanks again JeanLuc
     
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  6. dave newell lvs

    dave newell lvs Trader-Vehicle Services

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    I would opt for AGM2.

    D.
     
  7. Tony M

    Tony M Funster

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    Many thanks Dave. That's the setting I'm going to go with.
     
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