Yamaha EF1000iS / EF2000iS — Battery charging
Operation · 12V battery / DC output
For the Yamaha EF1000iS / EF2000iS, from the Yamaha owner's manual.
Before you start
- Do not connect a VRLA (Valve Regulated Lead Acid) battery.
- Do not connect any load to the battery or use the engine starter motor while charging.
Procedure
- Start the engine
- Connect the red battery charger lead to the positive (+) battery terminal
- Connect the black battery charger lead to the negative (-) battery terminal
- Turn the economy control switch off to start battery charging
Specs & values
- Generator DC rated voltage: 12V
- Charges batteries up to 40Ah, half-discharged, in approximately 5 hours
- Full charge electrolyte specific gravity between 1.26 and 1.28
Source: Yamaha owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.