ML-COVER-SLA, 12V battery charger for solar powered data loggers

12V battery charger for solar powered data loggers The ML-COVER-SLA is a power provision cover fitting our ML-x17 off-grid 2G/3G/4G data loggers to power a data logger from a 12V battery and to charge the battery from an external solar panel.

We designed our remote data loggers to be cost effective and low power, but as they are feature rich and practical in use as well, we see a growth in deployment in more power demanding monitoring applications. Think of applications with power hungry sensors or sensors that need to be powered continuously. In such applications a bigger battery, then just three AA NiMH batteries, is inevitable. An external 12V battery could already be connected to an ML-x17yy-DC data logger, but it required an additional charge controller. We have designed a new power supply option with integrated 12V battery charger to cut-out the cost of an external charger and to reduce installation costs as well, all you need is an ML-x17yy-SLA, your sensors, an external 12V battery and a solar panel.

Please use our online Data logger power consumption calculator to estimate the battery life of your application.
Specifications
1) Sensors that only require power during sampling should be powered from the 12V power switch of the ML-x17.

2) Sensors that require continuous power could be connected to the terminals of a 12V battery directly as well, but its better to connect them to the outputs of the charger board as they will be switched of in case of a depleted battery to avoid damaging the battery.

3) The battery voltage monitoring pin reflects the battery voltage divided by 2 to be able to connect it to a 10V analog input of an ML-x17 (Don't forget to multiply the measured value by 2 again).

Tip) Small capacity 12V batteries like the Pbq 2.9Ah could fit into an empty ML-x17 enclosure (ML-BOX + ML-COVER), if their dimensions stay within 92x74x64, 112x74x64 or 92x98x64 mm.