You can meter:
- DC diversion loads
- DC generation connected directly to your battery bank
With this $13US meter and shunt you can have a low cost means of recording DC kWhrs. We just installed 2 on our own DC hot water diversion loads and they work really well.
One of our two DC water heaters that has logged 414 kWhrs over the last few months. It is very helpful to be able to account for power sent to diversion loads via AUX relays. We may decide to disconnect our SHW collectors and just use surplus electrical power from the PV array to do all our water heating as PV is far less complicated than plumbing.
You will note our 48V system is:
- Floating at 54V
- Diverting 1008W (1600W is the max/heater)
- Amps = 18.65
- Energy = 414 kWhrs
We can highly recommend this solution, good information is key to managing your system well and at these prices there is no excuse not to have a kWhr meter installed no all your DC diversion loads and battery direct generators.
Likewise you can buy din rail AC meter so you can easily account for AC energy used by high loads such as refrigeration, hot water, water pumps etc.