Battery check

Will this panel's batteries carry the unit?

Pick the panel, enter its loops and add its cards. The check adds up the load, runs the battery sum with and without the Magnifire unit, and gives you a record to keep with the site.

1The site

Site name Panel brand Panel model

Standby the site needs

2The batteries

Capacity fitted (Ah) Last routine battery test

The batteries passed that test

Two 12 V batteries in series make 24 V at the capacity of one. Two 18 Ah batteries are 18 Ah, not 36.

3What the panel is running

Use + and − or type a number. Grey figures are typical values: type over them with the figure from the datasheet.

Quiescent

In alarm

4The Magnifire unit

standby, mobile data on

absolute peak, used for the alarm period

An Ampac interface board is fitted with it

5Sign-off

Technician Date

The sum and its assumptions

Capacity = ageing × [ (quiescent × standby hours) + derating × (alarm × alarm hours) ]

Alarm period (hours) Alarm derating factor Ageing allowance

Check these against the standard you design to before relying on the result.