Wrong voltage and you have bought the wrong charger. Wrong amps and you wait all night or stress the battery. Micropower industrial chargers and DC/DC converters come with the numbers published, and OEM NORDIC supplies them and ships worldwide.
Size it yourself in four clicks
Move the battery voltage and the amps and watch watts, mains load and hours on charge change. Uses Micropower's own Sharp 20 datasheet figures; charging time is a rule of thumb.
- Voltage first. The charger must match the battery: 12, 24, 36 or 48 V in the Sharp 20 range.
- Amps decide the hours. More amps shortens the charge, but the battery maker sets the limit.
- Published numbers. Rated output, mains power and efficiency are in the datasheet, so you can check the maths yourself.
- Straight to your quote. Send battery voltage, Ah and connector. We answer with the charger.
Pick your charger family
Champ IP67 chargers
Sealed IP67 housings for wet and dusty places. 12 V and 24 V units.
Shop Champ chargers →
DC/DC converters
Step 24, 48 or 80 V battery voltage down to 12 or 24 V for your loads.
Shop DC/DC converters →
Adjustable supplies
PAP802 adjustable DC supplies and a service charger for workshop and test use.
Shop adjustable supplies →Looking for higher currents, or the SHARP 50/100, ACCESS and LION ranges? Request a quote with your battery voltage and Ah. Browse everything in Industrial Chargers or the full Micropower Group range, and add matching REMA battery connectors to the same order.
From battery to charger in three steps
- Read the battery label. Note nominal voltage and Ah.
- Pick the amps. Divide Ah by the hours you can leave it on charge, then check the maximum charge current with the battery maker.
- Choose the connector. Tell us your plug type, or order the charger with a REMA connector fitted where offered.
Stop guessing amps
Send battery voltage, Ah and plug type. We come back with the matching Micropower charger. Need one charger now? Order it in the webshop. Quoted prices are available for multiple units.
Straight answers
Why does a 24 V charger put out about 28.8 V?
A 24 V lead-acid battery has 12 cells. While charging, each cell rises to roughly 2.4 V, and Micropower rates the Sharp 20 output current at 2.4 V per cell. 12 × 2.4 V is 28.8 V.
How is the mains power worked out?
Charging voltage × rated amps gives output watts. Divide by the efficiency in the datasheet and you get the mains power. For the 13 Sharp 20 models this matches Micropower's published figures within 3 %.
Can I use a charger of another voltage?
No. Match the charger to the battery's nominal voltage first, then choose amps.
How long will my battery take?
As a rough guide for a flat lead-acid battery: Ah × 1.2 ÷ charger amps. Real time depends on the battery, the charging curve and the temperature.
Do you supply chargers for other battery types?
Micropower describes its chargers as suitable for all types of batteries, including lithium-ion. Tell us the battery type and we confirm the right model before you order.
Who makes the chargers?
Micropower makes them. OEM NORDIC supplies them and ships worldwide.
Can I buy just one?
Yes. Order a charger in the webshop. For several units or higher currents, request a quote.
Sources: Micropower Sharp 20 datasheet and technical data, Micropower Group product information. DC/DC input power shown in the explainer is the ideal value before losses. Micropower is the manufacturer; OEM NORDIC supplies the products.