[RE-wrenches] System Monitor for HV Off Grid System?

[Starlight Solar Power Systems]

Right, it lacks many features. Old school method: tape a piece of paper next to the meter showing AH removed = xx % full. I think any shunt up to 1000 amps can be used. It can be programmed for different styles.

It also has two programmable relays to start a generator or notify the user to charge or whatever. For under $90 it has its place and covers the voltage range you need.

Thank you,

Larry Crutcher
Starlight Solar Power Systems
(928) 342-9103





On Oct 20, 2017, at 3:38 PM, Sindelar Solar <Allan at sindelarsolar.com> wrote:

Larry,

Thank you for the referral to this item. Unless I'm missing something:

- it lacks the ability to provide % of full;

- it lacks a charge efficiency factor, and can thus develop an accumulated error;

- the accumulated error can be manually cleared but not automatically;

- it requires a separate 9-30VDC power supply, most likely a wall wart AC power supply;

- it looks as though it would work with a 100A/50mV shunt, but I'm not sure.

Am I correct about these?

Allan

On 10/20/2017 3:58 PM, Starlight Solar Power Systems wrote:
> Look at the JLD 404. 500Vdc, 10kA
> see http://www.evwest.com/catalog/product_info.php?products_id=162
> 
> Larry Crutcher
> Starlight Solar Power Systems
> 
> On Oct 20, 2017, at 2:48 PM, Sindelar Solar <Allan at sindelarsolar.com> wrote:
> 
> Wrenches,
> I have an upcoming remote residential off grid upgrade job that uses one of the rare Michigan Energy Works inverter/charger/controller packages, this one from 1997, which the homeowner wants to continue using. The package uses a 120 volt nominal array (10 x BP90 in series) and a 144V nominal battery bank. I'm adding array (6 x 60-cell generic), replacing batteries (FLA with VRLA), and updating disconnects and overcurrent protection. Can anyone suggest a user-friendly system monitor that will work with this system voltage, something akin to a TriMetric 2020 or 2030? I can't think of one that will work with a system voltage this high. Mostly I'd like the percentage function for a nontechnical homeowner.
> 
> Thank you, Allan
-- 

*Allan Sindelar*
allan at sindelarsolar.com <mailto:allan at sindelarsolar.com>
NABCEP Certified PV Installation Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*

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